Engine Stumble on acceleration solved

Stumble on acceleration solved

I've been having problems with stumbling on acceleration for some time now. I've run diagnostics checks and they would come back 1st O2 sensor. I changed the O2 sensor, installed new plugs, installed new PCV valve, ran plenty of injector and fuel system cleaner through the engine and still a hard stumble and rough idle. I finally checked the MAF sensor and it was fried (this never came up on the diagnostics check, but would throw the CEL). One of the sensors was crusted black.

So a break down for this long post...

When you have stumble on acceleration:
- Check your MAF sensor first
- Check/replace plugs
- Check/replace PCV valve
- Check/replace O2 sensors (don't do this if you don't have to, it's a difficult procedure for the O2 sensor before the cat)
- Run fuel system cleaner through your engine

Ah....I have been through this. It was the front O2 sensor though-it was freakin cracked in half!

I had a slight stumble on acceleration that I cured with a thorough cleaning of the throttle body. After 40Kmi it needed it.

I dread the day I start getting the amber light that looks like an engine. They should replace it with one that looks like a dollar sign. "Check Engine, Empty Wallet".

I agree with the dollar sign! The MAF cost me $180. O2 sensor $145.

Cracked in half?! Was that before or after you were boosted?

After...

How do you use the fuel cleaner? I have fuel treament at the house...do you just dump the whole thing in when you fill up or what..

Ya fuel cleaner is added to a full tank of gas.

I think it's best to add the cleaner to a near empty tank right before the fill up ... at the gas station ... so it mixes...

just to be clear...

Heh..makes me wonder what stuff I forgot to do..just turned 145k the other day.

Maybe it's time to replace my PCV valve..