Can it throw lean code p0171? I can hear a buzzing sound sometimes when I step on it on cold starts
..

 

Hope ya can see the crack above the numbers

 

I can see it. not sure if it will affect you much.

 

I've been throwing the code for a while and I can hear a buzzing sound

 

i pulled off a zzp manifold that was cracked before, ended up being warped aswell, made a rattling sound when cold, huge exhaust leak. this car threw a lean on decel code, i forget what the actual code was tho.

 

Well that's shockin! Zzp header went bad did they have waranty??

 

i dont think so, the guy just ended up buying a new one (the revised one that has relieve cuts) but a turbo did blow on the manifold previously.

 

I just hope this is what's causing the lean code lol

 

Dawg, you have a vacuum leak. I'll bet your LTFT are in the positive double digits, right?!
Boost leak test with soapy water to find the leak. You can also smoke test it.

 

I used soapy water and found nothing lol then I used carb cleaner and no luck either.. and I thought the crack could b the issue since its before the 02 sensors but need more advise :P

 

Yes an exhaust leak before the o2 sensor can give you a lean code. When u get off the gas it pulls in air and throws the code

 

Alright , thanks will be buying a used header soon :P

 

Well after receiving mongorat's mani I decided to replace the cracked one
Removed heat shield and this is what I found

 

yup, thats cracked, ha

 

I have a spare exh manifold sitting around

 

Just installed a mani from mongo guys.. thanks though :

 

Your exhaust manifold shouldn't be throwing that code, do you have an aftermarket intake? Or did you do the airbox mod perhaps? Before I got tuned, my car was throwing that code because of the airbox mod, because of the extra air coming into the engine.

 

I haven't seen the code ever since I replaced the mani and I don't even have an intake lol

 

Really? Hmm...I used to get that code for my intake haha, even when my mani was cracked I never threw that code. Well glad you got it sorted out

 

: mani things can throw the code, even a dip stick that's not sitting properly lol

 

I kinda got the same or at least a similar issue... should start my own thread but I figured id chime in.. the only difference is I get that code and that leaky buzzing sound even after replacing the crappy manifold and dp the car had when I bought it.. put a new mad-nab headers and zzp catted dp.. still getting that noise.. fml

 

Same here I get a buzzing sound unde boost but no more code... I think it might b the gasket?

 

does that mean I keep blowing gaskets or something..? the car sounded normal for a couple of days after I put in header and dp.. and then back to that dumb noise..

 

Try tightneing the bolts , maybe they are not torqued right

 

have you checked the flexpipe? those tend to crack alot more often than manifolds do