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boyt911sc boyt911sc is offline
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Join Date: Mar 2002
Location: Philadelphia, PA
Posts: 9,060


If your cold control fuel pressure was 2.6 bar and suddenly increased to 3.0 bar this could be the result of the TTV opening. However, why did the WCP dropped down later? The WCP should remain steady while the engine is running unless the vacuum supply is deteriorating (?).

There are too many variables with your problem to solve it. You need to reduce or minimize these unknown variables by testing. For example, how much vacuum does your decel valve could hold? Same with the TTV. Same with the WUR. Same with the AAV. Finding and identifying this ďweak linkĒ will help solve your nagging problem.

The culprit is right there. But we donít recognize it yet. A systematic diagnostic test will eventually lead to its identity. At this point, I donít believe you/we are close to finding the most likely culprit(?). Donít give up yet.

Old 09-16-2018, 07:18 AM
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