CELs and Stuttering

[stevo1111]

I am trying to diagnose an issue with my 1995.

CELs 175, 176, 177, 524, 543

car runs great around town.

after about 30-40 minutes driving, leaving a toll booth with really smooth accelerations, it will throw a light and begin to stutter like it's not getting enough fuel. It will go on and off and continue to cycle through being fine, throwing the light then stuttering. The revs do not jump and you can't hear it in the exhaust, it's a constant tone.

I'm lost.

Any suggestions?

 

[mafioso]

have you googled the CEL codes?

 

[stevo1111]

yes,

codes 175-177 are lean, signal not changing and rich bank 2 o2.

the other two are circuit failure fuel pump codes.


Bad o2 and fuel pump?

 

[Frogman]

Sounds like the fuel pump. Can you hear the pump prime up when you switch the car to "run"? (not start).

 

[stevo1111]

It's not so loud you would notice it. It has no trouble pulling first gear up to 6000rpms though. I always thought fuel pumps failed all across the board, all at once. Maybe not the case.

 

[stevo1111]

Has anyone else had these codes before?

First thing is first, I'm going to run a can of sea foam through the gas tank and try to clean off the O2 sensors. They are probably shot, but if it clears it up for a little bit I'll be happy.

I don't want to throw money into something that's not going to fix the issue.