19twiztedz90

ok, well i had the car inspected and they wouldnt pass it without the cats, so they put them on. before they did the car would boost to 21psi and didnt have the fuel odor, now it only boost's to 15-16psi and smells like fuel really bad inside the car. the car has a computer tune that was done without the cats, could they be causing the problems?

19twiztedz90

ok, so i see that people are viewing this and not replying, so either they have no clue, or think the answer is posted somewhere else. i searched and found nothing related to my issue, yes there are fuel odor posts but not being caused by my issue. a little help can go a long way here!

NismoPick

Welcome to ZDriver!

I wouldn't say 8 views is a lot of people looking and not answering.

Anyway, do you have an air / fuel ratio gauge hooked up? How is the motor only boosting to 15-16psi when it was boosting at 21 before? Do you have an electronic boost controller? Do you have upgraded injectors? What psi is the fuel pressure? Does the car still run well?

Need more info ....

19twiztedz90

ok here is what is done to the car: 675rs turbo's, split bolt down pipes, ashspec ecu, nismo 555cc injectors, apollo front mount, dualz intake, z1 hard pipe kit, 1 piece driveshaft, coilovers, adj. shocks, a/r gauge, boost gauge, boost controller, turbo timer. the a/r gauge shows blue, which is extremely rich, and it wasnt before it went to the garage, the turbo's spooled to 21 psi and now it will only hit 15-16 psi. they put cats on it which so far i heard is the problem but that was from people that dont know these cars, it was tuned with out cats and now that they are there it isnt allowing the turbo's to spool and thus dumping fuel that isnt needed? this is my theory but is it your guys or girls also?

ZBRICK

Is the smell full time or just when stationary? Did you check the injectors to see if you have a leak?

Sweets

Try using high flow cats. Are those legal?

jverz

I've never heard of them being illegal. As long as it passes the emissions test and there are cats there you're good. Plus what inspector knows the difference?

19twiztedz90

ok, well i just got the car back from the garage which put a new clutch in, the clutch is a 6 puck ceramic w/ a light weight fly wheel, which it didnt have before. so the car is boosting to 18psi now and the fuel smell isnt as strong, i am so lost. could the flywheel caused it to boost a little higher now?

NismoPick

I think ZLover needs to chime in.... at which time you will be blasted for having a FMIC on a Z32.

b300z

have you checked for an actual fuel leak?

is the a/r gauge a wideband?

and whats the stock boost setting for the turbos?

jverz

I don't know if he will, to be honest there's so much been done to this car it's nearly impossible to diagnose without physically being there.

If it was tuned without cats then I'd bet you need to re-tune it with cats.

19twiztedz90

ok, so i ordered parts to replace the cats{ yes i konw it is illegal to remove them} and once i get them installed i will post back to let you's know the diagnoses

jverz

I don't know if it's legal or not. You could live in Turkey for all I know.

19twiztedz90

i live in lancaster county, pa, and it's not legal!!!

jverz

You weren't supposed to tell me

19twiztedz90

lol, well i got the exhaust fixed and all the issues are fixed as well, no more fuel smell, and she is boosting to 21psi again, thank god!!!