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Old 06-04-2015, 10:44 PM   #30 (permalink)
phunk
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Join Date: Mar 2009
Location: Chicago
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Quote:
Originally Posted by Mitco39 View Post
Just got to Vegas, fuel pressure was fine till the temps got up to about 210-220F and the idle fuel pressure dropped down to 40-50PSI and I could confirm that it was low because my AFRs were showing leaner than it was when it was at 58PSI.

I am really starting to think this regulator is being affected by heat and that spring that regulates pressure is getting weaker with the heat.

Possible?
Never heard of it happening before but I suppose anything is possible. I'd still bet on the mystery brand pump. Unfortunately its unlikely to be diagnosed fully until you begin the process of elimination.
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