(, The TPS idle switch is DEAD. f The 1996 to 1998 real FSM calibration procedures for TPS is Here and Here. As you turn the throttle up or down. spec is. (your meter manual shows these facts) Now the ECU will enter idle mode and activate the ISC system. ECU, engine controller unit (a.k.a. (cut means broken,cut or corroded) TPS = Throttle Position Sensor: The TPS is located on the passenger side of the throttle body. A set of feeler gauges. THROTTLE POSITION SENSOR (TPS) 1) Turn ignition on. In most cases 50 ohms to 1000 is the range on the switch carbon (real hardware) then jumps to INFINITY about .030_ travel off the stops, The only reason this is hard, is the silly carbon cheap Suzuki switch. (however an analog meter may see them or a graphic GMM may, and all scope for sure can). So before The green arrow is pointing to the voltage reading which should be close to 0.50 volts. If you have a scan tool, I recommend allowing the engine to warm up to wires. Once the driver is properly positioned, tighten the Allen screw to lock it in place. Stick the pin in the center wire of the throttle position sensor plug. 3. The TPS can fail this way: (on autoranging meters, it will tell you the scale its on just ofter the readings eg 3.5 k, means 3500 ohms the K ICON on the meter LCD means , times 1000) Works well. The Throttle angle pot is acrude5,000 ohm(3500- 6500 ohms) Pot. engine around the throttle blade or thru the IAC passage at idle. This program lets you connect your laptop to the ECM to conduct data logging sessions while driving the car. Aftermarket camshafts with lots of duration or lots of overlap tend to lower the TheAnglepin only needs to be linear, (foot action to Ohms(volts) It mustnot glitchas you drive. MPI is 16v Multipoint Injection motors, and has no Dash pot steps, or device. If these ck ok there are other more complicated issues you would need a scan tool to ck. The reading should be the same as the previous reading. I use tinyalligator clipsto comment my DMM meter to the TPS male pins, or I remove old female pins from spare connectors to make up test wiring. The TPS switch is not closed at idle, for any reasons. aka, set at threshold of closure. are you using the stock TPS? 2003 S10 Long Bed 4.3L ZQ8 + 2/3 drop, Caltracs, rear disk conversion, 7" dual diaphragm booster, 255/50/R16 Falken ZE-512, MPFI converted 2114, 48LB Racetronix injectors, eBay RS BOV, Accel 60115 distributor, Aeromotive FPR, Corbeau Forza seats, Mach headers, 2.5" front mount intercooler, Innovative turbo, Precision Industries Vigilante 3,000 RPM torque converter, EFILive COS3 tune. custom built to order, please reach out to us. 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. Select the configuration button. discovered most shops dont have these tools anymore. or when your stopped at a stoplight and hit the gas a little it sputters for a sec or two the runs smooth. 172318 . Gray/ yellow 0 Volts. This should force the radiator fans to come on. All TB cables are 10mm loose. This page covers calibration and testing , on car or off, volts and ohm methods. The throttle position sensor (TPS) circuits (wires) that we're gonna' be testing are: Throttle position sensor (TPS) circuit A: GRY (gray) wire and it connects to the F-14 terminal of the blue PCM connector. STOICH: (means perfect fueling) that happens in Closed Loop mode of the ECU. Adjustment is made by rotating the TPS driver slightly clockwise to increase (counter clockwise to decrease) percentage & voltage. and What is it, what does it do? Start engine and warm up sufficiently. No dash pot. Say the 1991 car has a 1989 actual engine, (or parts) and not 1991 . Set the scan tool to TPS voltage (or connect DVM) then set the adjustment screw for the lowest value & still touching the throttle arm stop. Throttle Position Sensor adjusting the easy way! ), Using Walmart leather sewing needles work great. Nothing more. if the TPS delays opening, the idle switch , as you move the throttle pedal, a tiny bit ( .020) The ECU and ISC will fight you hard, and it willSURGEduring that fight. Key ON: No start(we will measure, the 4 pins live and hot, anduse back-probing method)All connections, normal, no disconnects! METER MADNESS: Locate the TPS on the throttle body near the air intake hose. Thank you from italy. (about 300k) After replacement of Idle Air Control (IAC) valve, system must be cycled as identified for PCM to properly control idle speed. ON THIS at all ! Step 1: Locate the sensor. Open = infinity, (meter shows , infinity ohms) Keyon, NOT RUNNING test: (with alligator clips to hold them) these can work great. or potentiometer, or variable resistor. Figure 3: air will always be allowed to enter the engine around the throttle valve. I've got an '89 and used a scanner to find out my TPS was shot. No need at all for expensive tools to do this very simple calibration. This page is only complex because of the 10 years covered and 2 engines and evolutions of the same. Turn ignition switch is "ON". If ENG idle speed does NOT drop below curb idle speed, check for vacuum leak. (below 300 is TPS spec) {ECU wants below 500 ohms but spec is 300}, If the TPS screw mount slots bottom out, here theTV valve shaft is bentor the valve stop screws were. < with good skills you can set it with one feeler(calib). If you also look carefully the TV throttle stop screw isblocked from anyone touching it !!! When you start any TBI car, the Dash Pot must retract before 30 seconds expires or that part is bad. (0 volts connected on a running engine at idle (hot)) TBI throttle position sensor chevy small block throttle body injected Efurd Garage 7.12K subscribers Subscribe 35 Share 3.2K views 10 months ago One way to change the throttle. but at with the pedal to the floor, it only goes to 3.9v (the old sensor did this too, probably didnt need replaced.) All steps here: trouble codes thru the check engine light). That would put the main line pressure to maximum. (+5 vdcis applied to the TPS pot pin A, from ECU, if not , ECU is bad or this pin A wire is grounded out.. or cut) 4.75 to 5.25vdc is factory spec.. 4) The TPS was not set with the feeler gauge on the threshold of closure. tps. There are exceptions to that. in software we think, so use 300 for best upper limit) Connector unpluggedat theTPS 16v: (it has connector locks, be careful we cant buy new ones) after 100k miles many TPS can fail on any car, and depends, on utility, be that, city ,highway or mix, when that happens. have no SWITCH at all now, one just sets the volts and you are done) {0.5v at HOT idle , key on), (Which pin is TP ?. Just give it a try. Eg. In the instructions it says to adjust the tps to .65 volts but it does not say how. (A/C fast idle), If not closed this idle switch, at idle the, if set (closed switch) to far into the TPS range, then the car , will have TIP-IN bogging. You are done. Rotate TPS CCW , very gently and get the TPS switch to just close, just barely. MPI92 -98 1.6L only USA. EARLY 1989 and 1990 TPS Calibration and idle speed I had to stack some feelers to get this. Way to go Ford. To check that the TPS is getting power, go to: TEST 2: Verifying Throttle Position Sensor Has Power. : (off car tests) TEST 1: Checking The Throttle Position Sensor (TPS) Signal. This is the Fast ohms tests, unplugged tests. ( resistance meter){ near 5volts} On cars that dont have an adjustable throttle position sensor, the ECM Tools: (no more Code 44s now !) (but can if the ISC goes dead and other failures, prevent air flow to the engine or very weak fueling as this idle switch will shut down, the ISC) Two things come to mind very quickly. Remove cap from ported tube on rear TBI and connect manometer (J-23951). year ECM, you should be able to adjust the minimum air setting by doing the This helps the ECM learn the position of the IAC valve. DMM/DVM: meter set to 20k Ohm range: See Figure 2 above for pin locations. What is it? The throttle body costs between $200 and $500, while the labor cost is around $50 and $150. operated at normal road speeds (35mph or more). The wrong factory part number TPS was installed. Only the Dashpot on top left of TB throttle body, is allowed to do this. and it will work. (by people) I have the only list like this in the web. 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?) Any ohm meter works, here, even the $10 Walmart meter, works very well. Key ON. Pin B stuck at 5v, is caused by a bad TPS or the ground wire broken. maintain a set idle speed. Turn the throttle down by tightening the TBI's screws. 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. (put the. It should be mounted to your throttle body, which is on top of your engine. The TPS acts oddly, because the ECU is in. (aka SPI ,er, single point injected, bla bla) (the ECU cant tell the difference from a glitching TPS or a driver with a wild right foot) If idle speed is not okay after cycling system, problem is usually caused by a dirty throttle plate or vacuum leaks. Tighten the two bolts in the sensor so it will no longer move. Standard Ignition 3 Terminal Connector - S674. ( I will cover 92-98 1.6L 16valve MPI method here) A GO /NOGO method this is called. (to avoid this nasty EFFECT) Adjust the TPS to 0.5v that is 1/2 volt, exactly. If you dont have a scan tool and you are working with a pre 1994 model (Fuel pressure wrong, timing belt slipped, EGR stuck open, leaking injectors,clogged injectors (full or partial)), Exceptions:(to how the TPS is used) VOLTAGE ADJUSTMENT: 1. Adjusting the TPS switch is the ACT of Calibration. A $250+ Suzuki part. and kick down cables. need to adjust the throttle stop screw. 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 Stuck at 0v means Pin A wire is cut or open or ECU pin A not at 5vdc, or the TPS is bad.