ls1 codes P0131 p0137 p0151 p0157 help please

[skinypuppy]

oh sorry buddy did not see that... thanks!

what kinda pump would you recomend?

[SMWS6TA]

Depends on your intentions?

Do you plan of modding your car later or keeping it stock with basic bolt ons?

Basic bolt on's - OEM, I'd stay away from the parts stores and go with gmpartsdirect or rock auto.

Modding the hell out of her - Racetonix $210 (I'm not sure if I can post website, let me know if interested, I'll PM it to you)

Me, I have plans on modding so I'm going to go to the Racetronix when mine goes.

[JayTA98]

couple of things. Check the fuel pressure 1st. You mention that the O2 are the universal type meaning that the have to be spliced in to the harness.

If your Fuel pressure comes out good(58-60) then I would make sure that they installed the wiring of those sensors correctly. FYI and just my opinion don't buy anymore more universal sensors specially the O2. They might be cheaper but they are prone to more problems.

if your fuel pressure is low change your fuel filter too it could be clogged.

[SMWS6TA]

Agree with Jay, universals are more problems then the savings.

If you do check the fuel pressure and it is low, change the filter 1st, it is the easiest and quickest thing to do, plus it is routine maintenance that most ppl neglect. It only takes about 20 mins to do.

It may be the problem.

[Cutlass]

hey skinny i as the mod in the other section to merge your other thread with this one and move it to this section.

merged per your request!

[Joseph_98]

alright so i tested my fuel pressure.. and its riding 60 at idle and it barley drops to red line...

so i think the fuel pump and the regulator is fine?

[Joseph_98]

so any other ideas.?

[Joseph_98]

Ok ..
I cleaned the mass air flow sensor
I checked fuel pressure 60 psi all the time
I ran injector cleanor threw it
..

Only mod is borla exaust

..

Anyone have any other ideas why all 4 o2 sensors would run the codes previously stated?
Thank u for your help

[JayTA98]

Ok ..
I cleaned the mass air flow sensor
I checked fuel pressure 60 psi all the time
I ran injector cleanor threw it
..

Only mod is borla exaust

..

Anyone have any other ideas why all 4 o2 sensors would run the codes previously stated?
Thank u for your help

are you sure the o2 sensors were wired correctly? other than unless the wires are pinched or melt. I keep looking and see what can i find.

[Joseph_98]

P0131, P0137, P0151, P0157 codes that are popping up

alright i also just deleted the pcv in hopes it was just a bad vaccume leak but still stumbles and hesitates like a mother...so all i can think of is

mass air flow messed up
spark plug wires
egr vac leak
maybe a short in the o2 sensors wires
o2 sensors

any other things you think might be able to fix this would be very appreciated

[JayTA98]

P0131, P0137, P0151, P0157 codes that are popping up

alright i also just deleted the pcv in hopes it was just a bad vaccume leak but still stumbles and hesitates like a mother...so all i can think of is

mass air flow messed up
spark plug wires
egr vac leak
maybe a short in the o2 sensors wires
o2 sensors

any other things you think might be able to fix this would be very appreciated

you said you deleted the PCV. Did you plug the holes? do you hear any air leaks?

[Joseph_98]

i plugged all the holes and put on the breathers for the valve covers.... and i did have a vacume leak in that system but i dont think that is what the problem was.. because it still hesitates and still throws the code after hard driving..

[SMWS6TA]

Joseph 98 list any mods that you might have.

Aftermarket MAF?

[Joseph_98]

1998 trans am
exhaust
that is all lol

[Joseph_98]

could the trottle position sensor do make this happen?

[SMWS6TA]

yes

[Joseph_98]

here is my code scanner.. maybe someone is seeing something im not lol
[ame]http://www.youtube.com/watch?v=KIQD7QVHPVY[/ame]

[Joseph_98]

lol i have also searched from top to bottom looking for vacume leaks and found nothing