Question about 1988 Jeep Wrangler

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I have a 1988 Jeep wrangler that was idling around from 1500 to 2100 RPM. After replacing the old 2BL with a new Webber it seemed to fix the problem and idled at 700 RPM but after sitting all night I cranked it and it was back at the 1500 to 2100 RPM. What could be causing this, has an inline 6 4.2L.

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  • heath_harris Oct 08, 2010

    I have a 1988 Jeep wrangler that was idling around from 1500 to 2100 RPM. After replacing the old 2BL with a new Webber it seemed to fix the problem and idled at 700 RPM but after sitting all night I cranked it and it was back at the 1500 to 2100 RPM. What could be causing this, has an inline 6 4.2L. The last reponse I received stated this is normal for cold engines, by the time I reached work this was still an issue; 2100 RPM is not a normal idle speed even for a cold engine.

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Check the accelerator linkage, it prevents the throttle valve from closing completely. Also check the throttle valve spring, it might be too weak and the airflow forces it open.

Posted on Oct 08, 2010

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Cold engines have a higher idling speeds. And then as the engine reaches its optimum temp, it comes down.

Posted on Oct 08, 2010

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1 Answer

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