Mambeau / Admin
Join Date: Dec 2003
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Re: Four Fuel pumps Four years
Besides the K&N cold air intake, do you have any other engine or performance mods?
If so - what are they?
What are the details on the larger tires and the modified rear end gearing? Unless you've done some re-calibration to adjust for the different tire diameter and / or gearing the ECM is trying to adjust the fuel / air mixture for the wrong speed. This alone may explain the miserable gas mileage.
I can't help but wonder whether fuel pressure problems have something to do with it. Have you definitely ruled out a fuel leak somewhere? I'm still hung up on wondering WTF would wear out fuel pumps, and an over-pressurized fuel flow might explain it by increasing the load on the pump.
If one or both these angles is what's happening, I'm even more baffled as to why the ECM isn't throwing one or more codes.
I suppose there's a combination of problems that would leave the ECM "blind" to the actual situation while over-driving the pump and fool the ECM into never throwing codes, but that seems like too much of a wild coincidence.
"If i saw a old dude with what appeared to be a cat over his mouth driving faster than me I'd stop driving fast." - Firdaddy
Line-X, ARE, Recaro, Team Voodoo, Husky, Lund, Optima, OMP, Aesthetic Finishers Inc.,Michelin