Question about 1994 Pontiac Firebird

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Got an oil change in my 94 firebird formula. The next day (after only 3-5 miles of driving after the oil change), my car started to idle roughly and had more of an elongated idle. Could the guys who changed my oil knocked something loose, like the mass air flow sensor??

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  • damonrjohn Mar 24, 2011

    It is not on. New distributer, plugs, wires last year...

  • damonrjohn Mar 24, 2011

    Not on...new distributor, wires, plugs last year...

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Check engine on? if so have a diagnostic run on it .

Posted on Mar 24, 2011

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94 honda accord vtec Car started to have a rough idle and a **** like feel when it only comes to a stop as in a stopsign or stoplight. When I accelerate pass 10mph the rough idle and jerks goes away....


I don't think it's a fuel problem. Sounds more like spark. Change plugs and wires, and possibly the coil pack. Also could be idle control sensor.

Mar 30, 2013 | Cars & Trucks

1 Answer

I have a 1994 Firebird 3.4 that runs rough intermittently when warm.


I can't imagine anything being affected by changing the oil other than the valves in the heads. I assume you have good oil pressure hot or cold. I suppose you could be moving a wiring harness around when you take the oil filter off.
It would depend on if the rough running is mechanical or fuel or ignition related to say what to check first. I would have to figure out which area is affected first.
Something like a sensor or a dead miss on one cylinder could turn the check engine light on, but most fuel and mechanical issues will not do it on a car of that year.
If one of the coils was failing when the engine is hot, changing the oil should have no effect.

Dec 19, 2012 | Cars & Trucks

1 Answer

Rough idleing in2000 deville


Need a professional mechanic to take a ride with you
driving & check all data,especially short term fuel trim.

The O2 Sesnors have less than 100,000 miles?

Do a cylinder leak down test,you have lots of miles
on the motor,so stay with basics & be sure you have
anything left in the motor mechanically

Don't know the car so what controls the idle,& is there an AIC
Valve to clean

Nov 20, 2012 | 2000 Cadillac DeVille

1 Answer

Have misfires on firebird hestation and acting


could be fuel pressur regulator or coils

Apr 12, 2010 | 1994 Pontiac Firebird

1 Answer

I have 2005 cavalier when at an idle is rough not when driving


MASS AIR FLOW ENTIRE UNIT(I GOTTA 1987 FIREBIRD FORMULA AND THE SAME THING HAPPENED TO ME)

Dec 18, 2009 | 2005 Chevrolet Cavalier

1 Answer

1998 firebird 3.8 v6 92000 miles runs great until 3000 rpm then it runs rough and starts to miss


Same thing happened to my 94 firebird. Did your car run hot at any point? Mine overheated and ended up melting a couple of plug wires.
I replaced the wires (and plugs). That took care of the problem.

Jun 09, 2009 | 1998 Pontiac Firebird

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