kazuma

Hey guys I've run into sort of a weird issue and I am stuck at what it could be.

I had noticed that my car would go ridiculously rich(<10 afrs) sometimes and if I let off and go back on the gas it would disappear but lately it does it no matter what I do except if I were to go WOT it goes and sits at about 11.5-12 afr which it should do. so far I've done the following trouble shooting:

1.change out stock FPR for a aeromotive one, set the pressure to 40psi without vacuum and when vacuum is plugged in sits at 34psi. No difference at all
2. redid all grounds and added 3 additional ones. Much better lighting but still no difference
3. replace Coolant temperature sensor(not the gauge one but the ecu one). No difference
4. Checked for boost leaks. When I did this I found I had a boost leak right at the throttle body which I fixed but I also heard a very loud squeal from the back of the motor near where the head meets the block(bottom of intake manifold). At first i thought it was a the big o-ring that keeps the injector in and replaced it(it had a small rip anyways) but then I realized it wasn't that and I could actually feel air pressure from underneath the manifold.

I think the intake manifold gasket has to be replaced but I just wanted to get some other opinions before I did that(still have a stock manifold and it's a PITA to remove as you all know).

PS: the build is:

built ka24de(ross pistons, eagle rods)
stock head
650cc injectors/z32 maf/tuned ecu(chipped)
t3/t4 50trim turbo


thanks!!

ch1873857

did this happen all of a sudden or has it always done it

if its always done it its probably the tune

if it just started. try switching MAF sensors

kazuma

it just started doing this. Ya I will be switching out mafs hopefully today and go from there.

anyone know what sort of voltage I should be getting from a n62 at idle/car off but key in the on position?

Crondy

use goggles!

kazuma

huh? wtf is goggles?

ch1873857

google......

frftw

probable more boost leaking, like you said check the im gasket

__________________
1990 240sx coupe, 1997 BMW 328i, 1981 MB 300SD

santi5222

my car has been running rich for a while. yesterday I noticed the plug on the coolant temp sensors was lose. pluged it up good car ran fine. just my 2 cents

daftphunk

My car has a huge exhaust leak at the down pipe. It's all fucked up from scraping so much. Would that also cause a car to run rich? Or am I strictly looking for boost leaks?

Idles at around 12.5