WhosNXT

We have a 94 z with, Shortys and a single high flow, Cold air, Cam(size unknown the seller did not know), and hypertech hand held. The car was bought last week went through emissions and failed. The hydrocarbons were 808. The legal limit is 220! Does anyone have ideas?

NYC32798

Could be that the cam in there is too big for emissions. Or it could need a real tune instead of the hypertech to get it running right.

David94TA

Is there any way you can find out about the cam? That would help. If you have a tight LSA with a lot of valve overlap, that is going to hurt. Also, get rid of the Hypertech and go to a dyno and get tuned (or detuned) as the case might be. Do you know for sure that the cat is functional as opposed to being gutted? Do you have larger injectors? I'm still trying to get through emissions myself. I just replaced my CC305 112LSA with a blower cam and we are going to switch to smaller injectors for the test along with some tuning. Good luck.

Billy177

get a cat on there that is the only way you are gonna pass with a big cam in terms of hydracarbons

Z28eatinhonda's

make sure you run it good and then dont let it set and idle before the emissions are tested. I have a 93 with a gutted cat with a pipe in it. failed first time so i took it out and "ran" it came back and they couldnt hardly get a reading on the emissions

UnitZ28

are they stock injectors? old? leaking? is your maf clean? plugs? clean oil?

anaik

Check for exhaust leaks at the header flanges.

WhosNXT

Thanks guys I will relay all this to my friend, This is his first fbody and its just kinda a bummer he cant even get tags for it! Ill keep you posted.

WhosNXT

Actually guys problem solved. My freind took the car back to the lot that sold it to him. So now he's going to get one that hasnt been molested.