znasrah

im getting two codes for my light one says system too lean. and i was wondering if i make the air to fuel richer would that help? or should i not do that and the other one says FPDM disabled/offline... any help on what i can do for both of those thanks

timeformiller44

well see if there is anything not working right making you run lean first...by dumping more fuell your not fixing the problem that made the car run lean in the first place....

richinwa

Too lean is usually a vac leak, mass air flow meter, t.p. sensor, bad fuel pressure reg,stuck injector, bad gas,???? Could be number of things. How do you plan on making the adjustment to the fuel system yourself anyhow? Look at what your o2's are doing first if you can, you may just have a slow o2 popping that code.

Matts00GT

Too lean is generally an o2 sensor. Did you turn off your rear o2s when you put on the O/R x? Might be time to switch out the front o2s. Get it scanned at advance.

znasrah

what about the other code??? and my 02's should be off bc i got it tuned for that.. so how do i find out exactly what it is?

Matts00GT

Take it to advance. Their scanner can pinpoint it usually.

bb 460

I think fpdm is related to fuel pump. try new fuel filter then see if that will clear the code, if not my best bet is the fuel pump is not putting out enough, hmm reminds me of a girl i once knew

richinwa

I think it's Fusl Pump Diagnostic Monitor, you may have a fuel pump about to go ****-up. Or it may be something in that curcuit that has too much resitancelike the relay or the inertia switch.

8banger

Exactly.. possible cause of the lean condition...car runningslugish on top end?check the fuel filter first....clogged filtercan cause the fuel pump work harder drawing more ampreage than normal....

znasrah

i changed the fuel filter like 3 months ago.. so iono what the deal is.. if it helps the light never came on until i changed my throttle body and plenum..