Question about 1984 Pontiac Fiero

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1984 Pontiac Fiero

Low idle engine quits at stop

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  • Brocephus May 11, 2010

    Need more information in order to provide a solution. Could be timing, poor injector performance, a bad Idle Air Control valve, bad spark plugs, rotor or distributor cap. It could be a number of things.

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Possibly O2 sensor, sensor tells car fuel/air mixture. check oil, make sure not leaking

Posted on Feb 06, 2009

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Posted on Jan 02, 2017

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1 Answer

What is the maximum speed pontiac fiero 1983


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84 pontiac fiero injector want spray on crank up


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Mar 11, 2011 | 1984 Pontiac Fiero

1 Answer

Fiero Engine is spitting


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Apr 25, 2009 | 1986 Pontiac Fiero

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Removel of fuel pump on an 1984 pontiac fiero se


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Mar 25, 2009 | 1984 Pontiac Fiero

1 Answer

Engine idle


dirty intake throttle valve and air bypass idle speed control motor. ttry the following.

Here is the most common cause of surges and stalls at stops and low erratic idle speed and 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.

Mar 15, 2009 | 1985 Pontiac Fiero

1 Answer

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.

Feb 10, 2009 | 1986 Pontiac Fiero

1 Answer

Low idle engine quits at stop


Try toying with the timing, there's a good chance it's off a little bit and it would cause the stall. I had the same problem and changing the timing definitely helped.

Oct 21, 2008 | 1984 Pontiac Fiero

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