Rabbit running rough

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Ears - 06 May 2007 00:26 GMT

I have a problem that just started. Below 3000 rpm and at idle the
car runs really rough, sputters and hesitates but above 3000 rmp it
runs fine. I replaced the cap/rotor/plugs and plug wires and it
didn't help. What's happening?

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samstone@aol.com - 06 May 2007 00:39 GMT

>I have a problem that just started. Below 3000 rpm and at idle the
>car runs really rough, sputters and hesitates but above 3000 rmp it
>runs fine. I replaced the cap/rotor/plugs and plug wires and it
>didn't help. What's happening?

I'd start by looking for a vacuum leak, visually check all vac lines and
the rubber connectors. Listening for these leaks sometimes helps.

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dave AKA vwdoc1 - 06 May 2007 04:49 GMT

Lean is a possibility but rich is another possibility.
I remember handling a problem like that and found that rodents had a nest
inside of the air filter housing and one of their nuts (acorn possibly not
the other type you might have been thinking of! lol ) had lodged inbetween
the fuel distributor body and its plate keeping it always slightly raised.

Control Pressure Regulator (AKA WarmUp Regulator) might be defective too!

Year of the Rabbit could help out here! It might have an 02 sensor that is
defective or shorting out.

>>I have a problem that just started. Below 3000 rpm and at idle the
>>car runs really rough, sputters and hesitates but above 3000 rmp it
[quoted text clipped - 3 lines]
> I'd start by looking for a vacuum leak, visually check all vac lines and
> the rubber connectors. Listening for these leaks sometimes helps.

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