Thread: Car stalling and P0171

I've been having this issue for a couple months. I thought the P0171 and coolant loss was from my LIM. Well I replaced the gasket and UIM but it still has this P0171 code.
Sometimes on acceleration it jerks like it cut off fuel for a second and sometimes while going through a turn at the light that requires to let go of the gas or sometimes at the lights it just stalls out. I turn it back on but I have to give it gas for a bit to prevent it from stalling again.

The SES light for P0171 usually comes on after these events. MAF or vac leak? I cleaned the MAF while doing the LIM fix with electronic parts cleaner.

That's what I was thinking but it's so an intermediate issue. It idles fine most of the time and not high. And the SES light turns on and off

Usually an o2 sensor isn't the problem with a p0171 as from what I read from Bill on this forum

Yep been trying to find a vac leak like that. It's the same as finding a boost leak in a way. I've had 4 turbo DSMs lol. I think it might be my EGR pipe. 180k on this motor.

Well sprayed everything I could with carb cleaner. Nothing. I'll do it again with the engine warm as that is when it stalls. I think I hear a hissing sound from the plastic fitting that connects the brake booster hose to the UIM. I have a new Dorman UIM. I didn't RTV that o-ring. Should I of did that while installing? I sprayed it and nothing. I'm thinking its the EGR tube.