So I just put a Full MPx Exhaust with catless DP and Muffler Delete. In the mornings when its warming up, it bogs revs high then low. Once u rev it up like 3 times it clears up. Sounds like something is clogged up... Tough to explain. Exhaust just sounds weird, but when it is warmed up its perfect..

Any suggestions?

 

maybe cat warm up cycle?? are u tuned for the catless dp? if not it could be throwing off ur O2 sensor

 

That's what im thinking Cause my A/F on my RPD is saying no data available. Will I be safe to drive on it.. Planned on getting it Tuned in about a month.

 

ya u will just throw a CEL for the O2 sensor, so if u throw a code thats why, then when u get tuned tell them to turn the code off

and the cat warm up cycle will make the car rev at like 1500-2000 rpms when u cold start it to warm the cat up, so thats why it idles high then after a min it should go down to normal

 

I have a defouler and still throwing code. Once i get a bigger front mount im gettin it tuned. I might have to post a video tomm, cause i have never heard this before. The car shakes and feels like its going to just turn off. Its weird..

 

hmmm....did u do anything else beside the exhaust? like maybe u have a boost leak?

 

Nope thats it, and never had a problem before. IM Gm stage 1 and still perfectly hitting around 21 without no delay. Like I said, drives and feels fine after warm up. Just dont want to turn it on and one morning it blows or something lol

 

lol it wont, it wont let itself hurt the engine, no CEL's though?

 

No the only one i Have is for not having a CAT and when i went to put the defouler on. The o2 sensor was SUPER BLACK. But the car only has 6500 on it. So i dont think they can be bad

 

ya for sure, it might be your GMS1 sensors, i know alot of people had problems with those, do u have an intake?

 

Yeah the Injen Intake and IC piping

 

theres your prob lol ur not tuned with the intake, i bet your fuel trims at idle are off

 

And with the exhaust on it now, would i be noticing that problem then? Plan on just knocking this intercooler out. And just getting trifecta

 

ya maybe with the skewed fuel trims and now the O2 sensor, it just makes it run funny

these cars are so damn picky sometimes lol

 

Man I hope so. Cause I know it aint no defected exhaust and downpipe lol.

 

ya lol only real way to tell it with a tuning program

 

Well I guess ill have to deal with this till the time being. Prolly gonna run a OBD on the computer tomm just to make sure something isnt showing.

 

ya might have a stored code or something

 

Ya i'll check. And if it leads to big problems. Ill just throw the stock exhaust back on and take it to chevy if something happens :p

 

haha hell ya! well good luck and keep me posted

 

HA,Will Do!

 

Sorry to revive an old thread.... But if you are having this problem then you need to change your oil.

That is what happens. Change your oil, and it should get sorted out. If you went without changing your oil, it would crank over, bog, and sometimes shut off, then it will try to restart itself.

 

it could be the weather getting colder too...