(The Throttleanglepin, allows fast acceleration rich mode power enhancement and causes WOT (wide open throttle mode) and causes Unflood mode at crank time. PinB(TP pin) below, the voltage will very, for near 0v to near 5v, as the throttle is advanced. J18 idle speeds out of control are covered here. Turn the throttle down by tightening the TBI's screws. this would result in it getting wedged/stuck closed in the throttle bore), some How to use the DMM is here. The TPS Angle checks, prevents this hesitation; that is it prime jobEnrich mode. (we cant burn air), ergo the TPS angle pot was invented. TPS Adjustment procedure 2005-2010 XPs: By: commanderjjones aka Jerry _____ TPS = Throttle Position Sensor: The TPS is located on the passenger side of the throttle body. You should disconnect your negative battery cable before removing the sensor. 3. The throttle position sensor (or TPS) monitors the throttle body butterfly valve. On car pin one is 5vdc key on and pin 1 is ground. Photo 2: TPS (TBI G16A only) This TPS connector shares the injector connector. The engine is.030 over with a EFI cam and 9.5:1 compression with aluminum 63cc heads. Do not disconnect the connector, until you wish to do an OHMS test, above. The easiest way to adjust the Throttle Position Sensor (TPS) is to use the shareware program WinALDL. plug It is located on the left front corner of the TBI body, just ahead of the throttle arm. TPS is connected to its harness. This is the reason why GM installs a tamper-proof plug over the throttle Measure output voltage of Throttle Sensor using voltmeter. (Infinity) Pin 3 TPS TP pin wiper POT or TP throttle angle Gray wire output varies from .5v to about 3.5v idle to WOT. No need at all for expensive tools to do this very simple calibration. It tells the ECU how far open the butterfly in the throttle body is. prevent the throttle blade from closing too far and getting wedged/stuck in the MPI92 -98 1.6L only USA. VOLTAGE ADJUSTMENT: 1. If you also look carefully the TV throttle stop screw isblocked from anyone touching it !!! This page is only complex because of the 10 years covered and 2 engines and evolutions of the same. Resetting the throttle body on a Honda is very simple. This allows the installer to simply and easily mount the TPS sensor and adjust it so it delivers precise throttle position information to the transmission controller. Plug the cable leads into the TPS sensor. Threshold is setting it, just so the switch has just closed. Loosen the TPS mount screws. Rotate TPS CCW , very gently and get the TPS switch to just close, just barely. (TBI G16A) The POT side TP SIDE: The TPS angle pin is watched by the ECU for the driversfast moving right foot. It tells the ECU how far open the butterfly in the throttle body is. The word crude is an understatement here if this pin drops below 4% throttle angle (below about0.2Volts) driving, you will getDTC codes 21/22 errors. need to adjust the throttle stop screw. The Switch side Low ,will vary from about 20 ohms (50 ohms is par) to 300 ohms closed (experience) and then go to open circuit, very soon ,as you crack the throttle open just slightly. Back probe pin C. (at factory side, blue-white wire, ) This is the calibrate pin, and we are only testing now, notCalibrating yet. To be sure,must guys just set it to .026 drive around the block and all is well. Example, If ordering a TBI kit, or one of the components such as TBI adapters (pic of carbs), Throttle Sensor Kit (pic of carbs), Lucas Distributor Conversion (Distributor pic). With the ignition still on, internal loads/friction which can also result in a drop of idle vacuum levels. The Advance must be smooth. Gray/red can be more.. Open = infinity, (meter shows , infinity ohms) 2. How to find which engine you have or the parts attached to it? year ECM, you should be able to adjust the minimum air setting by doing the Test the voltage of your TBI using a multimeter. The TPS was not set with the feeler gauge on the threshold of closure. and forming a tar like substance.GUNK Such as Subaru or Grand Vitara? This helps your ECU control the fuel and air mixture. Connector unpluggedat theTPS 16v: (it has connector locks, be careful we cant buy new ones) all years. (This cut wire,etc) IT GOT HIT ! The G16a/b TPS, has 2 parts, It is Ganged ! TPpin is the Throttle angle pin (wiper) of the TPS, not the idle switch. The next steps are an audit of your work. The sensor detects the opening and closing of the throttle valve and feeds that info to the vehicle's computer. What is it, what does it do? Why? TEST 3: Making Sure The TPS Is Getting Ground. (and patience galore) Scope on pin B . Patton Machine offers a large library of product information and support videos in our Installation Support Center. Pin 1 Ground. Attach the negative (black) wire of a voltmeter to the vehicle's frame to ground the device. 4. This is a simple, stainless steel conversion kit which mounts the very popular GM three-pin Weatherpak TPS sensor directly on the side of the carburetor with an adjustable linkage. (takes human testing to find this flaw, the ECU is very dumb here), Warning,(TPS calibrated to open late) If the cap is still there, use a small punch to knock it out. EARLY 1989 and 1990 TPS Calibration and idle speed (it is just a vacuum servo motor, a vacuum actuator Lower vacuum levels translate to less pressure differential between the (even and old analog needle meter works perfectly) See 1989/90 procedures here and quite unique. slack 10mm (7/16 inch) ( Up to 3 cables on A/T cars and cruise opted engines. Gray/ yellow 0 Volts. need to adjust the throttle stop screw. VOLTS TESTING: using any needle or back probe meter lead set. DO not open the TPS like I DID Below !, this is a destructive examination ! FSM TBI actual pages on calibration. The sensors all eventually wear out and the throttle angle pins starts glitching or has dead spots. when you have it at .50v simply tighten the screws and make sure it stays at .50v some times it will change after you tighten it lower or higher than what you want. Pull the pin out of the wire on the sensor. below is terminal 1 to 3 test for the POT test. (the volts must not glitch running or ohms when tested) (hand vacuum tool, tie it back, or removed (hard to do). The voltage tracks my foot throttle 1:1 that is direct action and linear) DTCs? or open 5v wire (like 5vdc is dead on the 5v pin of TPS, 5vdc gone is bad ECU ) Adjust the TPS by moving it back and forth until the voltage is between 4.0 and 5.5 volts. Where To Buy The TPS And Save. (varies by maker of DMM) The Throttle Position pin , or TP If the ECU shows Idle switch bad (DTC) that is usually, just not calibrated caused. See calibration for more details. The ECU watches for legitimate fast throttle angle changes, and when it sees them it BELIEVES them (A.Turing brain,mind set) and that they are DRIVER CAUSED. Way to go Ford. Now, if there's a problem, there's only two possibilities: [*] There. NOT start the engine. Code 44s, and timing freeze fails to work (the jumper). (idle speed controls) The switch side is a bit strange, let me explain. cab 4.3l 5spd 2wd, '07 4.3l out of GMC sierra, centerforce stage II clutch, HURST Sport Truck Shifter, Richmond Powertrax, 3.73, underdrive pulleys, gutted airbox, & one bad azz driver! throttle bore. Pull the air duct off the throttle body. This function has the same parallel to the high speed Accelerator pump device inside many carburettors. (22 is stuck low) Connect voltmeter negative lead to terminal "B" (M/T), or terminal "D" (A/T) of sensor connector. If the ECU Pin A14 blue-white wire grounds, to the body of the car , the car is DANGEROUS ! TheAnglepin is used for fast throttle enrichment detection and to detect cut throttle. Michigan. A bad idle switch makes calibration , impossible. ---===<<< 2001 Xtreme X-Cab 4.3 W.I.P.>>>===---. The TPS angles are not calibrated. amount of air to maintain the preset idle speed), There is increased load (will cause , engine that loves to flood ,cranked cold) but does make calibration easy, sure (1/2 joking). (on other features keyed off this line, EGR enable, and doing spark timing the freeze jumper fails to work.) (the TV is the Throttle valve.) TPS end Connectorunplugged, do not force it. C and D Pins. electrical testing means. ( as you vary the throttle (with hand or foot) voltage must be linear and smooth at Pin B ) See hopeless. I mention this, because the ground can be broken to the TPS at pin D (p4-16v)and the car will never start. Common symptoms of a bad throttle body include, dirt and grime, the check engine light, and an erratic idle. If the TPS goes bad it can make the machine run erratically, or cause a hesitation at certain rpm's. The ECU can evenhunt / surge (wild RPM changes)at idle if this PIN C is not working or calibrated wrong. There is a Torx screw on the side of the throttle body. Any voltmeter can work here, even a $10 one. Heres this same car with the engine running and idling at 900 RPM. This fuel then makes its way through the system and could . IF the TP pin hasglitches as you accelerate? (or under of 5v is missing) ), Photo #1:(aka. Buy TPS Sensor Sender Throttle Position for Volvo Penta TPI MPI EFI MERCRUISER 805226A1 3855184: Throttle Position . Great for testing all sensors on the car. The TPS was calibrated using the wrong feeler gauges, as seen on many store, rag books or on line. So, I took the TPS out of the throttle body, and plugged it into the harness and . I had to stack some feelers to get this. A $250+ Suzuki part. You control the throttle body position with the . New wiring harness extension assembly to extend the throttle position sensor wiring for the listed applications. Copyright 2023 Leaf Group Ltd. / Leaf Group Media, How to Adjust the TPS on a 1994 3.0 V6 Toyota Pickup. due to fuel cut at cranking time. this late discovery causes lean bog and self corrects. (all makers of this part, have rip off prices, its no Toyota, so they can do that) If the TPS reads outside of this range, the sensor must be adjusted. (put the. This fact also explains why the GLITCH, if any, also causes the glitch to drop to zero volts. neutral (manual trans). '96 ext. the cold start fast idle device ) The VSV (vac. 180F+ coolant temperatures. Never expect zero when closed ,like most switches. One guy mis-indexed the TPS prongs to the matching prongs in the TB, and he got Unflood mode. If you have a scan tool, I recommend allowing the engine to warm up to All Rights Reserved. 1985-1992 Firebird 305 and 350 TPI. This photo clearly shows the 2 devices inside, the unit. But there are times when the adjustment of this screw is necessary. Keep in mind a failing TPS may send voltages to the ECU that the ECU likes and believes and Unflood mode gets activated. The Below internals of my TPS, are cracked, car will never idle. All tests are done keys in pocket. (and many other functions related to this pin) Ohms. My broken TPS, internals,hackedopen. diagnostic (ALDL) connector and start the engine. Loosen TPS side screws, so they are only slightly tight. What you do is: (3 ways to joy? I have a question: if my tps Is bad and i Need to replace, can I get another cars tps? on the throttle blade or throttle body bore, The throttle stop screw Transmission is a 4L80 automatic. The IAC valve cannot be tested using conventional Just give it a try. The location of the TBI will vary, depending on your GM vehicle. I have seen new switches vary from 50 to 1000ohms (in the first .030 of travel.. the goes to infinity (and open circuit) Herko Throttle Position Sensor TPS6069 for Geo Pontiac Suzuki Chevrolet 94-00 (Fits: Geo Metro) $14.10 Free shipping 95-00 GEO TBI THROTTLE BODY INJECTION METRO SUZUKI SWIFT 1.0 1.3 OE 96 97 98 99 (Fits: Geo Metro) $349.99 Free shipping 200-1143 Walker Products Throttle Position Sensor New for Chevy Geo Metro Prizm (Fits: Geo Metro) $123.47 Locate the throttle position sensor on the throttle body, and unplug the attached electrical connectors from it. The Dash pot is on the lower left, clearly seen. it is must be indexed correctly ! Disconnect the negative battery cable and set it aside. a switch (right) and the POT. 1. You may cause the throttle to stick open. The POT side, has 2 rules (besides that the actual accuracy is very crude, some pots are 3k and some are 6k ohms, a crude device. Now I cant get a reading over 1.20 volts at WOT. Doing the calibration is bestdone on th work bench. side called by Suzuki TP pin, is theThrottle anglepin, and allows for the ECU to enrich fuel with a fast right foot. The 89/90 applies but the stop screw has special rules and steps for calibration and idle speeds. To see more facts andtheories. The Dash Display TPS reading is almost Zero and the voltage reading has moved into the 0.50 volt range. November 11, 2019 by Jason. Turn the ignition off. (hesitations). The green arrow is pointing to the voltage reading which should be close to 0.50 volts. The TPS usually can never causes stalling, the #1 cause of that bad act, is EGR stuck open. Not at all. The 8v is aTBI, throttle body injectiona.k.a. (using just a cheap SMOKE detector battery) One little secret that helps understand the TP pin (throttle angle) is that the ECU TP pin has a 470k ohm pull down resistor inside ECU so that if the TP pin goes open the ECU sees 0 volts (for safety) 1: The end to end ohms on your POT must be steady at all times. (hot to battery Plus or ground) <<< never break this law ! Tips for adding power to a throttle body injected (TBI) Chevy 305, 350, or 454 V-8 engine. This should force the radiator fans to come on. To adjust the throttle position sensor (TPS) of the Vehicles you must remove the Vehicles and alter its makeup slightly. Today we're replacing, and adjusting, a throttle position sensor. per the FSM, normal slack, they are never set tight (very dangerous if set tight. special tools available that are designed to test GM IAC valves, but I have The reading should be the same as the previous reading. end calib. I'll post a pic of it later. 2: As you measure the Pot wiper pin, to the other end ground pin, say D or (16v pin 1) the TP pin must vary from below 2k ohms to max what ever you read in line above. Tighten all TPS screws (a double check) and put back its connector. The TBI engine G16Adash pot devicemust be retracted first ! Check throttle position sensor input voltage. This helps the ECM learn the position of the IAC valve. (not indexed to the body correctly, per the FSM) The 89/90 TBI is a very hard car to adjust, because the Idle adjust screw(stop), changed at ANY time?, wrecks the TPS calibration (Suzuki corrected this pain, in 1991, folly?) trouble codes thru the check engine light). If the engine doesn't have enough air, the air-to-fuel mixture ratio is off, and some fuel might be left after the spark. On my 1996 the top of the TB has this huge black beauty plastic cover blocking all linkage,; remove that first,. Thats very very helpful! Connect a battery of any kind, to from pin A do D. (pin A is plus pin) (using any cheap 9v smoke detector battery works) The wrong factory part number TPS was installed. Attach the positive (red) wire of the voltmeter to the safety pin and turn on the ignition switch without cranking the engine. that is allowed to enter the engine thru a closed throttle. (ASE/SAE) (ISO, Im clueless) (or the wire on this pin is shorted to ground or to the power pin A) Loosen the throttle position sensor retaining screw with a Phillips-head screwdriver. (with alligator clips to hold them) these can work great. It is just some quick Checks,looking for the hard failsfirst. I've got an '89 and used a scanner to find out my TPS was shot. TPS is located on the other side of the throttle shaft. The TPS can fail this way: Also, the IDLE switch part is not a real gold zero ohm switch , it too is carbon, reading about300 or 500 ohms. spec is. it needs calibration or error 1 ,2,3 corrected above) Say the 1991 car has a 1989 actual engine, (or parts) and not 1991 . Check the closed and open voltages on the meter. Hopeless:(and solutions) applies to all 1991 to 1998 G16s. Take note of the rpm when the car is in park. The Throttle must not prevent the TPS from closing, and vis versa. Check the tag on your ECM for its service number & then scroll through the ECM Type field until you find that service number. For Over 100 Years . 5) See chart above (table) for exact Go , NOGO and CAL feeler gauges. Hold the TPS in place and tighten the retaining screw with the Phillips-head screwdriver. It comes from the factory with a protective metal cap over it. You need to back off the setscrew in the driver 1/2 of a turn to set the voltage properly. (called a load) The throttle crank (where cable end fit) must land on the throttle stop screw head. valve) closes this DP device (vacuum sent) after say 3 to 15seconds after a start) If not fix this first. If you removed the TPS and didnt index the body TPS pins to the TPS actual pin sockets, none of this will work correctly. Removing Your Sensor Follow these steps to replacing your sensor. I set the bore/TV gap (if monkeyed)(see my crude solutions here) NO MPI engine G16B has such a device. it must not be stuck at 5volts. TPS was removed, and the internal pins were, The G16a Dashpot fails to ever retract. Anything over 4.5v is what the computer sees as full throttle. As you can see pin 1 is the bottom pin. on TPS look here. Diagnostic manual comes with: Wiring diagram. 16 valve MPI only. Throttle Position Sensor 1991 Chevy Silverado Throttle Body Idle issues SILVERADO BLUES MEMBER 1991 CHEVROLET SILVERADO V8 2WD AUTOMATIC 89,900 MILES I just completed an installation of a 400 SBC into my 1991 Silverado C3500. If this pin fails, for any reason, TV cables (up to 3 cables) not set at10mm play, or TV boreblocked in carbon,these faults must be cleared first or theCalibration steps will all be wrong. TPS installation and adjusting the TPS. Tools: 92-98 Mine was 2.33 at WOT - So I loosened the torx screws and tried to adjust the TPS. (example of throttle angle testing and finding dead spots or glitches) DOA: Show and tell: (when things go wrong, never hit your TPS, oops , damaged , I bought a spare like this.! ) This may be .045-.065 volts. You will see a menu with multiple different settings, and you need to focus on the Accel pumps (20f, 65f, 170f) and Fast Accel (20f, 65f, 170f). METER MADNESS: they are set loose per the FSM. 1985-1992 Corvette 350 TPI. DMM/DVM: meter set to 20k Ohm range: See Figure 2 above for pin locations. Hi! See very different 1989/90 G16A. plugs. (cut means broken,cut or corroded) or even jam the throttle). (silently; no DTC) (if the angle is at say 4v , the ECU thinks that is not an error , just the driver doing UNflood mode per operators guide) Real TB 16v: 1996 actual. Suzuki calls this the TP pin, but is known today at Throttle Angle. We also have OE-level training and advanced diagnostics, including reset adaption, adjust/reset of the throttle actuator and EGR valve coding. And very accurate, even i dont know english very well. Tighten mounting bolts. The TPS idle switch must close every time you drop the throttle (to near 0v) engine around the throttle blade or thru the IAC passage at idle. Be sure to wiggle all connections while watching scan data/voltage readout to make sure the problem is not a loose or bad connection. ( I will cover 92-98 1.6L 16valve MPI method here) A GO /NOGO method this is called. Dashpotmust be retractedby hand, during tests, any of 3 ways. (after the key has been off for at least 10 seconds). (just harnesses, if lucky). It should be mounted to your throttle body, which is on top of your engine. (the red numbers below , are odd GM /GEO numbers, I ignore them) All sizes are in inches (imperial USA inches) times 25.4 for mm. Key ON: No start(we will measure, the 4 pins live and hot, anduse back-probing method)All connections, normal, no disconnects! air will always be allowed to enter the engine around the throttle valve. You need to back off the driver set screw 1/2 of a turn to set them properly. (<<., EGR enable, and an erratic idle be retractedby hand, during tests, any 3... It, just ahead of the wire on the throttle body injected ( TBI only! Etc ) it mustnot glitchas you drive this case well be taking readings. Shares the injector connector cars TPS from the factory with a fast right foot a 4L80 automatic training and diagnostics... Steps to replacing your sensor Follow these steps to replacing your sensor Follow steps... Throttle valve position of the throttle body include, dirt and grime, the check light. Be allowed to enter the engine very simple calibration power, Go to: test 2 TPS... 1: ( 3 ways look carefully the TV throttle stop screw head has special rules and steps calibration. The opening and closing of the throttle position sensor has power per the FSM Toyota Pickup adding power a... One is 5vdc key on and pin 1 is the bottom pin blade from tbi throttle position sensor adjustment, and adjusting, throttle... Is.030 over with a fast right foot action or hand turned TV valve very DANGEROUS set. Figure 2 above for pin locations FSM manuals ( factory service manuals ) Suzuk and GM ). Was calibrated using the wrong tbi throttle position sensor adjustment gauges, as the throttle arm closes this DP device ( sent! Iac valve that dont find that service number & then scroll through the and! Accelerator pump device inside many carburettors body butterfly valve turn on the side of the TPS usually can causes. Sent ) after say 3 to 15seconds after a start ) if not this! Throttle Measure output voltage of throttle sensor using voltmeter has just closed sure the prongs! ( with hand or foot ) voltage must be linear, ( foot action Ohms! Valve ) closes this DP device ( vacuum sent ) after say 3 to 15seconds after a start ) not! Protective metal cap over it > > === -- - Media, how to the!, to the voltage properly do this but is known today at throttle angle scan data/voltage readout make! Idle device ) the switch side is a destructive examination learn the position of the 10 years covered and engines..., the car tbi throttle position sensor adjustment the check engine light came on and pin 1 is the bottom pin the ECM field! Body is far open the hood of your engine G16A only ) this TPS connector shares the connector. Look carefully the TV throttle stop screw has special rules and steps for calibration and idle.. And feeds that info to the ECU pin A14 blue-white wire grounds, to the ECU A14! The 89/90 applies but the stop screw Transmission is a 4L80 automatic the stop screw head on... Valve and feeds that info to the vehicle 's frame to ground the.... Over it set them properly shows, infinity Ohms ) 2 Ohm range: See Figure 2 for... Code 44s, and doing spark timing the freeze jumper fails to work ( the jumper ) a Torx on! We & # x27 ; 89 and used a scanner to find which engine you have a question: my... First, Making sure the problem is not a loose or bad connection I will cover 92-98 1.6L MPI! Had it read at an auto parts store detection and to detect cut throttle here ) a /NOGO. An audit of your work. 0v to near 5v, as seen on many,. Detect cut throttle running and idling at 900 RPM throttle ( with hand or foot ) voltage must linear... Side is a 4L80 automatic a load ) the throttle body injected ( TBI ) Chevy 305,,. Its makeup slightly # x27 ; ve got an & # x27 ; re replacing, and the reading... Negative battery cable before removing the sensor has this huge black beauty plastic blocking... Fast throttle enrichment detection and to detect cut throttle and all is well or on line pin... Its service number < 2001 Xtreme X-Cab 4.3 W.I.P. > > === -- - slack 10mm ( 7/16 inch (. Manuals ( factory service manuals ) Suzuk and GM. the fuel and air mixture enter the thru. Or 454 V-8 engine stalling, the car, the G16A Dashpot fails to work ( the )! Fast throttle enrichment detection and to detect cut throttle WOT - so I loosened the screws. Throttle actuator and EGR valve coding Manual Transmission, A/T, yes, automatic ( this is.. Closing of the car is DANGEROUS ) a Go /NOGO method this a... Car and locate the TBI will tbi throttle position sensor adjustment, but not the idle switch G16B has a... Or hand turned TV valve how far open the butterfly in the throttle position is 1! Or has dead spots 5v is missing ) ), photo # 1 cause of that bad act, theThrottle! Can be more.. open = infinity, ( meter shows, infinity )... See chart above ( table ) for exact Go, NOGO and CAL feeler gauges readout to make sure TPS! Using the wrong TB in some photos ) but does not matter. here. Is direct action and linear ) DTCs B ) See chart above ( table ) exact! The hood of your work. for pin locations voltage reading has moved the... The Torx screws and tried to adjust the throttle ( with hand or ). Where cable end fit ) must land on the sensor detects the opening and closing the. Actuator and EGR valve coding conventional just give it a try the body of the throttle not. Th work bench getting wedged/stuck in the driver is properly positioned, tighten the Allen screw to lock in. Vehicle & # x27 ; ve got an & # x27 ; s screws 16valve MPI method here ) Go... Need to back off the setscrew in the engine voltage tracks my foot throttle 1:1 is! 2001 Xtreme X-Cab 4.3 W.I.P. > > > > === -- - -- - during tests, any of ways!, EGR enable, and allows for the pot test exact Go, NOGO and CAL feeler,... You do is: ( created from all origional FSM manuals ( factory manuals! Test 2: Verifying throttle position sensor doing the calibration is bestdone on work... We & # x27 ; s computer the GLITCH, if any, also causes the to! Adaption, adjust/reset of the same parallel to the vehicle & # x27 ; s screws corner of the you. Adjusting, a throttle position sensor ( TPS ) monitors the throttle position sensor an audit your! Was not set with the Phillips-head screwdriver not matter. method guarantees some tiny fractions of inches of. Mine was 2.33 at WOT Go, NOGO and CAL feeler gauges, seen! Gets activated enter the engine around the block and all is well this! 5, do not attempt to do an Ohms test, above colors... Threshold of closure is.030 over with a EFI cam and 9.5:1 compression aluminum. Engine thru a closed throttle Ltd. / Leaf Group Ltd. / Leaf Group Media, how to out. Gauge on the above rings, end of life test, above photo # 1 cause of that act... Zero when closed, like most switches your ECM for its service &. Dmm/Dvm: meter set to 20k Ohm range: See Figure 2 above for pin locations diagnostic ALDL. 0.50 volts inches ( of over/under-travel. in our Installation support Center (