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-   -   79 3.0 - dropping idle (http://forums.pelicanparts.com/porsche-911-technical-forum/339353-79-3-0-dropping-idle.html)

twobone 04-03-2007 05:00 PM
79 3.0 - dropping idle
 
when I rev the engine and let off, the revs drop to an almost stall, then return to idle.

any ideas?

Joe Bob 04-03-2007 05:39 PM
Try turning the idle up....if it does it only when warm, you may have a vacuum leak or a airbox leak....

Do you have a pop off valve in the air box?

twobone 04-03-2007 05:48 PM
no pop off valve
 
Hi

No pop off valve

twobone 04-03-2007 05:49 PM
running problems
 
last summer it was having hot start problems

Could it be related to fuel pressure accumulator issues?

Joe Bob 04-03-2007 05:52 PM
Hot start can be pressure valve in the neck of the fuel pump....cheap part. The idle is a different issue.....could be fuel pressure related....you need a CIS gauge to test it.


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