Question about 1984 Pontiac Fiero

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1984 fiero what happens is that i drive the car anywhere from 1 mile to 5 miles, it runs great for a lil while then when i have to slow down for something the car dies. it starts back up right away but every time i let off the gas afterward the car dies and the car doesn't have any acceleration almost like the theres a plug in the fuel line. I fixed the O2 sensor and replaced the spark plugs and wires. now theres a hell of a knock in the engine. the car has 93000 miles and get pretty good gas milage

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  • misscherry_g Feb 08, 2009

    well found out the problem i have 4 giant wholes in my heads. going to replace that and see if thats better



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Sounds like u got a timming issue or a wire on the wrong plug geta book and check your firing order

Posted on Feb 07, 2009


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Do you know plug wire line up for a 1995 pontiac fiero 2.3

The Pontiac Fiero was made from 1984 to 1988
In the 84 thru 88 Fiero's they had the 2.5L In-Line 4-Cylinder or the 2.8L V6.
I have included both below

For the 2.5L In-Line 4-Cylinder:
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For the 2.8L V6:
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Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at!

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Engine turns off when coming to a stop

I have used this procedure for years.
Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

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