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I have a 1998 Pontiac Firebird 3800 car starts soon after dies out. I was getting a code saying to replace my throttle position sensor. Then it said engine cooling sensor. I replace both now car starts as soon as the dogs out what's next

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  • Cars & Trucks Master
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Are you loosing fuel pressure when it stops running ?

Posted on Jul 27, 2013

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Posted on Jan 02, 2017

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SOURCE: engine stalls

your on the right route but also check egr valve

Posted on Jul 07, 2008

  • 90 Answers

SOURCE: throttle position sensor

HI
did your car have (ETS) electronic throttle control system
the TPSis a part of this system
but you can test it by using diagnoses scan tool to check the TPS value when press or depress the accelerator pad.
so you can tell us the NO. of DTC for example(P0122)
ASK FOR MORE INFORMATION

Posted on Jul 14, 2008

emissionwiz
  • 76848 Answers

SOURCE: 1995 pontiac bonneville 3800 v6

P0321 Spark Reference Circuit. The spark reference signal is used by the PCM to improve ignition timing accuracy during crank and at engine speeds of up to 1,200 RPM. The spark reference circuit allows the use of ignition control mode below 400 RPM, eliminating the need to utilize module mode during start-up, and also allows the PCM to calculate true crankshaft position in 1/6 the time that use of the fuel control reference signal would permit. During normal operation, the PCM uses the spark reference signal to control ignition timing until the engine speed exceeds 1200 RPM, at which time the fuel control reference signal is used. There is no connection to the TCS.
If everything checks ok then the PCM is defective PCM.

Posted on Aug 28, 2008

dsacco86
  • 1077 Answers

SOURCE: Missing, stalling Pontiac Sunfire

The OBD II code for P0400 is Exhaust Gas Recirculation Flow Malfunction.
I'm sure the only thing you have left is you may have to replace the EGR valve or check for any leak from the vaccum lines going to to EGR valve.

Posted on Jun 01, 2009

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1 Answer

What could be causing my 1998 Pontiac firebird v6 3.8l,to "backfire"-"clunk",and lose power when taking off, or getting on the highway???


A bad mass air flow sensor , TPS - throttle position sensor , plugged catalytic converter ! You should have it checked out ! Is the check engine light lit ? or any other lights ?

Apr 20, 2015 | Pontiac Cars & Trucks

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Obd1 codes


could be ignition module or a coil or crank sensor or cam sensor
hope it helps

Mar 27, 2014 | 1991 Pontiac Firebird

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I have a 1999 Pontiac firebird. The car started to die on me. It starts but when I push on the gas it dies. Sometimes u can start it and rev it up but then when u put it in gear and push on the gas it...


a defective tps sensor could cause this kind of defect..tps is the throttle position sensor..located at the intake manifold connected in the accelerator cable

Jul 20, 2011 | 1999 Pontiac Firebird

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I have 1992 Pontiac Bonneville SE with 3800 engine runs good most of time but then it will start to miss and act like it is running on three cyls.,have replaced coil pack,ignition module,crank...


run engine until problem occurs. turn engine off or let it die. leave key on but don't start engine. put a paper clip in diagnostic plug under steering column. look at area on dash where service engine soon flashes. count flashes. (ex. 1flash-1,1 flashes=1,2. if you see 1flash of service engine soon, then 5 flashes in a row the diagnostic check = 1,5. It will flash this several times in a row. this is your code. look it up or ask and find out what it is. this is usually your problem area. let the car tell you.

Dec 28, 2009 | 1992 Pontiac Bonneville

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I have a 1988 pontiac firebird with a 2.8 v6 fuel injected engine that displays code 32 and 34. We have changed the plugs, plug wires, rotor, and dist. cap and have also replaced the mass air flow (maf)...


Check throttle position sensor (TPS) is a sensor used to monitor the position of the throttle. The sensor is usually a potentiometer, and therefore provides a variable resistance dependent upon the position of the valve. The sensor signal is used by the engine control unit (ECU) as an input to its control system. The ignition timing and fuel injection timing (and potentially other parameters) are altered depending upon the position of the throttle, and also depending on the rate of change of that position. For example, in fuel injected engines, in order to avoid stalling, extra fuel may be injected if the throttle is opened rapidly (mimicking the accelerator pump of carburetor systems). the cost about 50-75 bucks.

Oct 21, 2009 | 1988 Pontiac Firebird

1 Answer

My 1999 Pontiac Firebird will not go over 10 to 20 mph. After trying to excel the engine cuts out. When trying to restart it, the engine rumbles then dies. After waiting a few minutes its the same thing...


mine done the same thing and i had to replace my throttle body sensor. you can just buy the sensor , well not on mine anyway. i have a v-6 so maybe thats your problem.

Sep 29, 2009 | 1999 Pontiac Firebird

1 Answer

After it warms up it stumbles and dies especialy when you stop or


Check throttle shaft bushings on throttle position sensor end. If there is a lot of wear on tps end it will make the tps erratic and can cause this. I have seen this on more than one occasion. Hope this helps you!

Sep 17, 2009 | 1991 Pontiac Firebird

1 Answer

My 00 pontiac grand prix starts 3 seconds and shuts down


P1122 is a throttle position sensor code. P1629 is a theft deterrent system code. P1122 will set when the voltage signal from the throttle position sensor drops below 0.1 volts. Normally, the sensor should measure between 1 volt at idle and 4 volts at full throttle. A failed throttle position sensor could easily cause your problem.

As for the theft deterrent system code, with that code set, the car shouldn't start at all (if the code is active). With P1629, the engine computer should refuse to deliver fuel to the engine. This code can be stored for up to 40 warm up cycles before clearing itself, so unless it is currently active, there may not be any need to worry about it.

I would inspect the wiring and connectors leading to the throttle position sensor. If that wiring is good, I would replace the sensor and see where that got me. Give that a try and let us know how things go.

Jul 28, 2009 | 1998 Pontiac Sunfire

1 Answer

1998 3800 v6 firebird... wont run right after starting


Possibly a weak fuel pump, idle air control valve, vacuum leaks, or loose or damaged wiring in the ignition system. Check for vacuum leaks first. That's the only one that won't cost anything. Make sure all intake bolts are tight, and all hoses are connected properly and in good condition.

Jul 20, 2009 | 1999 Pontiac Firebird

1 Answer

1987 pontiac firebird trans am


I HAD SAME PROBLEM MY 87BIRD I HAD TO REMOVE THE FUELTANK AND REMOVE THE SOCKSCREEN OFF THE ELEC.FUELPUMP THE OTHER 87BIRD I HAD TO EXTEND THE HOSE TO BOTTOM OF TANK.ONE I CHANGED FROM FUEL-INJECTION TO 4-BB Q-JET ONE I LEFT ELEC.PUMP IN JUST REMOVED SOCK STILL WILL WORK.MY PROBLEM WAS SAME IT WOULD START AND IDLE FINE,IT WAS WHEN I TOOK IT DOWN THE ROAD IT WOULD DIE ABOUT A BLOCK AWAY.BELIEVE ME I WENT THRU EVERYTHING ALSO.HOPE TO OF HELPED OUT

Jun 07, 2008 | 1987 Pontiac Firebird

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