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If this is a V12, it's because the basic idle speed is too fast and the ECU shuts down the engine until it drops - and then the cycle repeats. This is usually because the idle speed controller is stuck open. You can try adjusting the idle speed on the 13mm screw on the side of the idle speed controller (back end of left hand bank on the water rail), but this won't fix a stuck ISC. You need to replace it (about £150) or attempt to repair it if you're really brave!
Anther possibility is an air leak in the inlet manifolds, downwind of the throttle - has much the same effect. You might hear a load hissing.
What else can I help you with?
What causes high engine idle and surges in the 1989 Corvette?
The cause of high engine idle and surges in the 1989 Corvette is due to..Read More
2001 Nissan altima engine surges on highway?
2001 missan altima emgine runs stall at a traffic light but engine does not cut off.
Why does 1996 Pontiac sunfire engine surges after warming up It if fine for the first 20minutes of driving then surges.?
This is a dangerous condition that can or will result in a collision/loss of control. There are multiple causes which include an evaporative emissions component failure and idle air control motor. These problems are indicated by the engine racing inexplicably.
What is one main function of the condenser for engine?
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93 s-10 blazer starts fine but after warmed up when you let off the gas driving it kind of like accelerates itself and when you park it it surges up and down any idea?
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How tall is Billy Surges?
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When was Franz Surges born?
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The different between sag and surges?
The different between sag and surges
In your 1996 Oldsmobile aurora the check engine light is on and it surges by itself what could be the problem?
Probably a vacuum leak. Do you have a code P0171 or P0174?
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maf sensor
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Engine. Surges. Stutters. Loses power. Hesitates. When you. Apply. The throttle are signs of a plugged. Fuel filter
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Could be many reasons. If there is an check engine light, have the code pulled with a ODB2 scanner from any local garage. Reference that code with what it means and you have a better idea where to look to solve the problem.
