Question about 1996 Oldsmobile Aurora

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What causes rough idle an surge? - 1996 Oldsmobile Aurora

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Vacuum leaks also cause surge and idle issues. After 20 years, vacuum hoses can crack and leak. I'd check and replace any vacuum hoses that look "old".

Posted on Apr 30, 2015

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By what you are saying I would think its the idle control valve.

Posted on Apr 30, 2015

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Both those answers are good. I would check vacuum lines and clean the throttle body and IAC first. Also check the flow from the injector/s. You can look at it and see the flow. Has to be consistent.

Posted on May 01, 2015

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2 Answers

Idles roughly, then low when stopped or in park, then dies. Decreasing gas mileage. Slow to accelerate


Sometimes that's caused by a vacuum leak near the manifold area.

Sometimes air in the coolant will cause an idle problem. Air will keep the air temp sensor from sending proper info.
Hope this helps.

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1993 Ford explorer.Began idling rough and surging


The test connector is in a holder at the back bottom of the fuse/relay box on the passenger side fender well. There are 2 parts to it: the main connector and the ground, you will need both connected to the diagnostic tool to get the codes.
Check your IAC (Idle Air Control) valve on the side of the intake. These get carbon fouled and tend to stick causing high rpm for extended times. Also the EGR valve should be checked (under the intake) as it will cause rough idle or stalling near idle.

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94 chevy astro rough idle and surge when driving


check throttle body and check for codes

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I have a 1988 Chevy C3500 1 ton PU. Engine runs great at idle and acceleration but when cruising it runs rough or surges.


if the truck has a locking converter goin bad it will surge at steady speeds such as 55 mph the converter will lock and unlock causing you to feel an surging

Mar 07, 2009 | 1988 Chevrolet C3500

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Rough idle / engine surges until power is applied


Sounds like a possible vaccume hose leak?

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My V6 1992 PATHFINDER IDLES RICH AND SURGES AT IDLE.


You need to Replace your Gas Cap. The Seal is worn and it is allowing Air to get inside the Fuel tank Causing your Rough Idle.

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