LT1-LT4 Modifications 1993-97 Gen II Small Block V8

fuel pump? optispark? something else? Help me out

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Old 01-14-2011, 11:05 AM
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Change the fuel filter & report back... it's definitely a fuel issue as 36 @ prime is too low. It should also never bleed off pressure.
Old 01-14-2011, 01:44 PM
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Originally Posted by myk
How're you east coast guys doing with the weather?
Simply marvellous......Got 61" of snow in December, a new local record. Had a short thaw, now it's back to the icebox and snowing, about 9-10" in the last week.


Yes, 36 lbs. of fuel pressure is indeed low, but if it's measured at the Schrader valve on the fuel rail, it's AFTER the filter, which could be restricted....Not a given, but a "could be"...
Old 01-19-2011, 12:28 AM
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So I think I fixed the problem. I took the fuel filter off to put the new one on. I shook the filter and heard some banging around. Kinda sounded like a maraca. The filter inside the housing was loose and moving around. I think sometimes the filter would block off flow then when I shut the car off the filter would fall into the bottom of the housing, allowing fuel to flow through.
Old 01-19-2011, 12:41 AM
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I've heard that somewhere.

Now get cruising again!



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