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Re: Something is Über Wrong Posted by Ari [Email] ![]() ![]() In Reply to: Something is Über Wrong, Aom, Thu, 25 May 2006 13:47:29 Members do not see ads below this line. - Help Keep This Site Online - Signup |
If you have a DI, I'd go back to the proper NGKs immediately. The DI is very sensitive to plug type. And as turrbo says, to gap.
When you pull the Bosch's out, look at them. Do they look like the engine is running rich or lean? Just one cylinder or all? Lean running may be low fuel pressure, vacuum leak, or sticky injector. Rich running can be a bad FPR, sticky injector(s), bad AMM, etc.
Low fuel pressure can cause poor acceleration, and since you mash the throttle even more ,poor gas mileage at the same time. A decent mechanic can do a pressure test and a flow test. Of course, how old is your fuel filter (and air filter?).
Most fuel pumps simply die, they don't start losing pressure. But it could happen. If you've done the easy stuff (right spark plugs, tune up (fuel/air filter), and the car is still a dog, have the fuel pressure AND flow checked. It's not that expensive a test, and a lot cheaper than just swapping out a pump and finding out it's perfectly fine.
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