Quote:
Originally Posted by CSG Mike
I consider +- 5-10% unacceptable; I would be up in arms if a tune had me sitting at more than, at a maximum, +-5%. Even fuel variance from the pump, at an extreme, won't cause more than 5%.
Popping an o-ring off on your fuel pump means faulty installation; if you use both o-rings supplied with the DW pumps, you can't have a leak that causes that failure. Typically 3 are used for installations to prevent that with this car.
OP are you getting a bank 1 or bank 2 over rich, and/or a fuel trim bank mismatch code? I need more info to help diagnose.
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May very well have been a bad instal because my shop fixed it for free. Popped may have been the wrog term. The tech said one of the o rings broke.
The guy working on it told me
"Pulled the pump, and an o-ring broke. Caused a fuel leak in tank at the pump. Made a Delrin spacer to keep the o-ring where it needs to be since your old one from your old pump didn't fit."
Maybe they lost or did not use all the o rings supplied