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High idle glowing hot manifolds weak power

S

Sig

New member
I have 2002 grand prix GT 3.8 replaced the LIM and UIM gaskets and everything went fine a couple days later I took it on a long trip. On the way back it started losing power it would rev up really high but not go anywhere kind of like how people describe they have a clogged cat, and then it started idling really high like 2500 rpm.

I rented a code reader from autozone it came up bad iac tps and maf. I replaced the iac and tested the other 2.

I drilled a 1/2 inch whole before the cat so I don't think that's the problem

I noticed my exhaust manifolds are glowing hot so I must be running lean. I checked for vacuum leaks by spraying starter fluid around areas that could potentially be leaking

I didn't replace the o-rings on the injectors. If one is leaking could it cause this?
 


clogged cat?

Without a wideband you can't tell if you're running lean.

If the upper injector o rings were leaking you'd have fuel spraying all over the place.

if the lowers are leaking you'd have a vacuum leak.

which normally shows up as a bank 1 running lean. which suggests vacuum leak.
 


Clogged cat...or your timing is way off...only really the 2 ways your manifold will be glowing red hot.
 
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