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1995 pontiac grandam runs rough hot runs fine coid

Change head and intake gaskets plugs wires fuel regurlator ready to change o2 sensor

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  • Cars & Trucks Master
  • 2,101 Answers

Have you tried the temp coolant sensor. sounds like yours maybe bad. Once it gets hot they can shut down a engine

Posted on Oct 28, 2012

  • 8 more comments 
  • conrad Oct 28, 2012

    the plaun gasket was leaking changed it put newgaskets on top ran rough so i changed wires and plugs than changed fuel regurlator dont no if o2 sensor is gumed up or deefect new plugs have 2 check ready 2 chang o2 sensor

  • conrad Oct 28, 2012

    not yet

  • conrad Oct 28, 2012

    car idles fine in nutrol not in drive motor shakes

  • conrad Oct 28, 2012

    car run fine cold runs rough hot in idle and worse in drive i meant

  • teds repairs
    teds repairs Oct 28, 2012

    well in drive that would be the tpi has bring up the rpms. are all the bolts torqued down right. I do a lot of 3.1 head gaskets ,and get one or two like this

  • conrad Oct 28, 2012

    i had afriend porse mechanic do it the oil and water dont mix any more so idont no ? what does tpi stand for?

  • teds repairs
    teds repairs Oct 28, 2012

    thottle position sensor ,but that would give a code. do you have any codeswas there any water or anti freeze in the oil. did he flush the engine out with a motor flush which goes in the oil and you run the motor for 2 minutes and drain it and put flesh oil and a new filter

  • conrad Oct 28, 2012

    yes i flushed it

  • conrad Oct 28, 2012

    i dont have a obd meter

  • teds repairs
    teds repairs Oct 28, 2012

    ok .is there any codes coming up

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Have you checked for vaccume leaks?
You've got lots of parts in there, Has the problem been the reason you have replaced all of those, or did it come up while doing some of the repairs?

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SOURCE: 98 chev 3.1L runs rough and dies at idle

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SOURCE: 1998 chevy blazer running really rough. It used

I had a similar problem and just happened to unplug the temperature sensor for the computer and the engine started running smooth.
So I replaced the temperature sensor and all was well!

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SOURCE: 2004 pontiac grand am replaced O2 sensor, spark

Idle air control motor(IAC). EGR valve. And vacuum leaks to include the brake booster and if you have a plastic intake, that too. this is a start there are other things that will have the same symptoms. let me know
Randy

Posted on Nov 12, 2010

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