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Geoffrey whalon Posted on Dec 06, 2016
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My 1990 pontiac firebird 3.1 v6 overheated and cut out 14 months ago and hasnt started since , is there a sensor that would cut engine off that would need resetting by the computer, thanks

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Jeff Armer

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  • Pontiac Master 15,575 Answers
  • Posted on Dec 06, 2016
Jeff Armer
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Overheated how bad ? Fried the engine , check compression ! Check to see if it has spark at plug wire ! Fuel pressure ! No there is no sensor that would cut off the engine .

Testimonial: "Got compression and spark and juice , put new ignition module and and distributor on it as the coil wire on distributor was broken, also put new cap and arm and leads and plugs , it backfires like once on turnover then nothing , thanks"

  • 6 more comments 
  • Jeff Armer Dec 06, 2016

    This vehicle has a distributer ?

  • Jeff Armer Dec 06, 2016

    Have you had the distributor out of the vehicle ?

  • Geoffrey whalon
    Geoffrey whalon Dec 06, 2016

    Yes replaced the distributor

  • Jeff Armer Dec 06, 2016

    Did you get back in right spot . #1 on top dead center an dist. rotor pointing to #1 cylinder . Sounds like your timing is off by 180 degrees

  • Geoffrey whalon
    Geoffrey whalon Dec 09, 2016

    Hi tried setting Timing , number 1 is at 7 o'clock on dizzy

  • Jeff Armer Dec 09, 2016

    on Dizzy LOL first time i heard it called that ! That's right #1 at seven O'clock with a clock wise rotation !
    http://ricksfreeautorepairadvice.com/3-1...

  • Jeff Armer Dec 09, 2016

    Does it have a mass airflow sensor or map ! Try checking five volt ref. voltage. At the TPS sensor .Do you know what 5 volt ref voltage is ? Engine computer supply's 5 volt ref voltage to some sensors on the engine , tranmission . If less then 5 volts a sensor could be shorted, bring down ref. voltage circuit inside the PCM - engine computer .This would cause no start condition . There are three wires at the TPS . Disconnect the connector and check to see if one has five volts . The other two are a ground and signal to PCM

  • Jeff Armer Dec 09, 2016

    Also , does the check engine light come on when you turn the key to the on position ?

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I have a 1994 firebird 3.4 v6 it will idle fine for about three minutes then it will fludder and die but as long as my foots in its fine. ive already changed aic sensor and the tps sensor and my egr v

1. You need to retrieve any engine faulty code with a scanner.
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Overheating, no coolant loss

I have a 1996 Pontiac Firebird with the 3.8 L V6, and have had problems until I replaced the DexCool (it's never ran so good!) However relating to your problem, there was a class action lawsuit regaurding the 1996 GMC/BUICK/PONTIAC 3.1 L engine, due to DexCool destroying the engine/heads/etc. Follow the link - I do not know all of the details, but it may be worth checking out. 1996 was the first year that DexCool was used at GM.
Hope it helps.
http://www.dexcoolsettlement.com/
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