Tonyrodz's Tahoe Build Thread

[Tonyrodz]

Now it just threw the belt and I don't have any tools.

 

[Scottydoggs]

its says bank 2 is lean. really lean. like vac leak lean, but that would be both banks showing lean. so likely a wet o2.

a neg number is rich, pos numbers are lean. so you got a +18 long term and a -31 on the short term, thats the pcm trying to make it right, but it cant win this fight lol

 

[Tonyrodz]

its says bank 2 is lean. really lean. like vac leak lean, but that would be both banks showing lean. so likely a wet o2.

a neg number is rich, pos numbers are lean. so you got a +18 long term and a -31 on the short term, thats the pcm trying to make it right, but it cant win this fight lol

Thx for the info. I just find it weird that I sat idling for like 20 mins AFTER hitting all the puddles, that the issue popped up. Btw--I was maybe 2-3 miles from home when the belt just came off--didn't break--, had no tools, and it was already up to operating temp. I said screw it! Turned around, got up to speed and shut the key off, as it was starting to overheat. The HOT COOLANT popped up. Coasted through red lights and stop signs--screw it. I must've shut it off and coasted about 10 times. Each time it cooled enough to not overheat. Guess I'll try to put the belt on tomorrow after work. Life is an adventure!

 

[Scottydoggs]

tossed the belt ehh? must have been pretty deep, or you were going fast lol

 

[Tonyrodz]

tossed the belt ehh? must have been pretty deep, or you were going fast lol

Neither. I was driving to the store. It was actually sunny and at normal speed--35-40.

 

[bigfootchiro]

Hmmm... something doesn’t seem right. What are your fuel trims as you increase in RPM? Say 1500 and 2500 RPM?

 

[Tonyrodz]

Hmmm... something doesn’t seem right. What are your fuel trims as you increase in RPM? Say 1500 and 2500 RPM?

I have no clue how to read the live data, that's why I posted a pic of what it was doing while idling. In your opinion, what do you think is/could be the problem?

 

[bigfootchiro]

I have no clue how to read the live data, that's why I posted a pic of what it was doing while idling. In your opinion, what do you think is/could be the problem?

The STFT is definitely compensating for the lean condition. This could be vacuum leak, dirty/clogged injectors, low fuel pressure, or even dirty MAF sensor. Since you went through a puddle, I’d check your air intake to see if you sucked up any debris that may have dirtied the MAF. Clean it with MAF cleaner and see if that works. Easy place to start.

You can also watch the live data. See what the trims are at idle, then increase the RPMs up til about 2500. Watch and see what happens. If the LTFT comes down to more of a normal range, then you more than likely have a vacuum leak or exhaust leak pre-cat, like manifold. If it gets worse with increased RPM, then more than likely a fuel related issue.

Keep in mind, I’m just learning about fuel trims too lol

 

[Scottydoggs]

did you just do a p/s pump or something? belts dont "just "come off.

 

[Tonyrodz]

The STFT is definitely compensating for the lean condition. This could be vacuum leak, dirty/clogged injectors, low fuel pressure, or even dirty MAF sensor. Since you went through a puddle, I’d check your air intake to see if you sucked up any debris that may have dirtied the MAF. Clean it with MAF cleaner and see if that works. Easy place to start.

You can also watch the live data. See what the trims are at idle, then increase the RPMs up til about 2500. Watch and see what happens. If the LTFT comes down to more of a normal range, then you more than likely have a vacuum leak or exhaust leak pre-cat, like manifold. If it gets worse with increased RPM, then more than likely a fuel related issue.

Keep in mind, I’m just learning about fuel trims too lol

Damn I hope I don't have a severe issue.I did check the air cleaner--not the maf--and it looked ok, no debris in the air box.