19BLACKBIRD99

So I'll be driving my car, and it'll throw codes saying it's running lean in both o2 banks, then after I erase them, my car will start jerking after it sits still and I start moving again say from a redlight or stop sign. Any suggestions on what it might be?

Darkman

iTrader: (2)

The lean codes can be caused by vacuum leaks anywhere upstream of the motor, contaminated fuel/fuel filter, or low fuel pressure. Other causes, which are less likely since you have codes on both banks, include exhaust leaks upstream of the front o2 sensors or a bad/unbalance fuel injector or injectors.

19BLACKBIRD99

Could it possibly be from a injector not seated all the way in the intake??

Darkman

iTrader: (2)

It is possible I suppose, but less likely. An injector problem with a single injector does not usually unbalance both banks - i.e. throw two codes.

19BLACKBIRD99

So could it be a bad fuel filter, it's probably time to change it, if so.

Darkman

iTrader: (2)

It could be a bad fuel filter. Fuel filters are killed most often by some contaminated fuel so fill up with fresh fuel after you change the filter. If you want to verify the fuel system - hook up a pressure gauge at the fuel rail and check the fuel pressure.

19BLACKBIRD99

Aight I will do that. And see what happens.

19BLACKBIRD99

It's holding 30 psi idling doesn't look good

Darkman

iTrader: (2)

The fuel pressure spec runs from 50 psi to 62 psi. Try it with the engine off, but the ignition to on/run.

19BLACKBIRD99

I did still at 30 and my fuel filter was nasty

Darkman

iTrader: (2)

Sometimes you have to flick the ignition on 2-3 times and take the highest reading - but if it does not hit 50 psi there is a problem. If it is not the fuel filter/fuel (which from what you are saying about the condition of the filter it still could be) then it is a weak fuel pump. Fuel pumps can get weak before they die completely.

19BLACKBIRD99

The filter is the only thing I can assume is wrong, I just installed a new racetronix fuel pump and harness. So that's not the problem I don't think.

Darkman

iTrader: (2)

Okay. Did the racetronix come with a particular pressure specification? (I am just curious.)

19BLACKBIRD99

I'm not sure. I didn't even pay attention to it lol

Darkman

iTrader: (2)

I just went to the Racetronix website. I did not see anything to indicate that the Racetronix would not deliver at factory spec pressure levels. I did see that the Racetronix has to be wired properly to deliver full performance. Good luck.

bayer-z28

iTrader: (14)

Possible FP Regulator? Did you do the pump, yourself? The regulator is above the fuel pump. Also check the voltage going to the pump itself. Check it right at the pump, if at all possible. Check the ground for it too.

Stock wiring:
-FP Relay is grounded to RF and LR of engine
-FP is grounded to left door sill. (??? no idea why they put it THERE.)

19BLACKBIRD99

I did have an extra ground wire. Im wondering if I find where it should be grounded it might pick up the pressure. It picked up 10 psi just from the fuel filter..