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Old 05-28-2012, 08:30 PM   #23 (permalink)
drmiller100
Master EcoModder
 
Join Date: Dec 2011
Location: Boise Idaho
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Quote:
Originally Posted by Old Mechanic View Post
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My best tool was pure knuckleheaded determination. No machine was going to beat me, the real question was how long would it take to figure out what was actually wrong, instead of just throwing parts at a problem, until you lucked out a got it fixed.

regards
Mech

I've only been absolutely stumped once in the past three years. 2001 s10 pickup. generally woulnd't start, but when it did it would idle, but wouldn't rev up.
check engine light, and engine reports lean bank 1.

MAF/MAP was fine, ECT was fine, no plugged cat, ignition perfect, fuel pump was 62 psi which was in spec.

No intake leaks.

Fought it and fought it. Eventually gave up, and referred them to a shop across town which works on them a bunch. I even was willing to pay for the second tow across town.

I called the shop I was sending it to. They asked some questions, took the referral.
An hour later they called back - they were swamped, and told me it was the fuel pump. Spec is 62 psi, but they won't run unless they are 70 psi, and you MUST use a Delphi pump.

They were right, and I went and gave them a big wet kiss and the customer was happy as they understand.
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