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#1
06-18-2006, 06:33 PM
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91 Caprice running rough
We have a 91 Caprice (89,000) that is running rough. If left in park the engine seems to run steady with no problems. As soon as I put it in drive the engine starts to run rough and pulling away it still runs rough. Driving down the road it seems good but when stopping at light it will run rough again. Things I have tried are new plugs,cap,rotor,air filter,fuel filter. I have cleaned fuel system (regane),throttle body,egr,idle air control.
Any help would be greatly appreciated as this car is now slated for the bone yard and I would hate to see it go. 
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#2
06-18-2006, 09:42 PM
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Re: 91 Caprice running rough
there is a gizmo that bumps the idle speed up when you turn on the a/c or put the car into gear to keep the thing from stalling out due to the increased load. i cant remember its name, but i would start there. it is a solenoid connected to the throttle in the engine. it extends to bump up the idle speed by pressing the throttle open a tiny bit. describe it to someone and they will kno what im talking about.
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#4
06-19-2006, 02:51 AM
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Re: 91 Caprice running rough
Quote:
__________________
1988 9C1 - Modified LM1 @ 275HP/350TQ - TH700R4 - 3.08 8.5" Disc Rear - see it at http://www.silicon212.org/9c1! 2005 Crown Vic P71 - former AZ DPS - 4.6 liters of pure creamy slothness! 1967 El Camino L79/M20 old school asphalt raper Remember - a government that is strong enough to give you everything you need, is also strong enough to take everything you have.
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#5
06-19-2006, 06:48 PM
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Re: 91 Caprice running rough
its called either the throttle positioner, or the ISC (idle speed control), which ever you have.
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