Can't pass AZ emissions
Thread Starter
Junior Member
Joined: Apr 2010
Posts: 15
Likes: 0
Car: 1988 IROC-Z
Engine: 5.7 TPI
Transmission: 700R4
Can't pass AZ emissions
I'm sorry if this has been asked but I'm not having much luck searching the forums.
I have an '88 IROC w/5.7 TPI. It failed Arizona emissions because it was more that twice the allowable number on CO.
The injectors were replaced last summer with 24# Ford SVOs. Other than that the engine is stock. I just replaced the fuel tank and the vapor canister was replaced when the injectors were done.
I took it to the mechanic, and he's stumped. He tested the O2 sensor and the air system. It's not flashing any codes. He said the CAT is coming up to temp.
Would putting in the higher flowing SVO injectors really cause the numbers to be that high? Should I consider an adjustable fuel pressure regulator to dial down the flow? Do I need to get a different PROM?
I'm stuck so any help would be appreciated.
I have an '88 IROC w/5.7 TPI. It failed Arizona emissions because it was more that twice the allowable number on CO.
The injectors were replaced last summer with 24# Ford SVOs. Other than that the engine is stock. I just replaced the fuel tank and the vapor canister was replaced when the injectors were done.
I took it to the mechanic, and he's stumped. He tested the O2 sensor and the air system. It's not flashing any codes. He said the CAT is coming up to temp.
Would putting in the higher flowing SVO injectors really cause the numbers to be that high? Should I consider an adjustable fuel pressure regulator to dial down the flow? Do I need to get a different PROM?
I'm stuck so any help would be appreciated.
Thread Starter
Junior Member
Joined: Apr 2010
Posts: 15
Likes: 0
Car: 1988 IROC-Z
Engine: 5.7 TPI
Transmission: 700R4
Re: Can't pass AZ emissions
Quick update: The CO being twice the allowed numbers was before the leaky fuel tank was replaced. With the new tank in there, it's more than five times over the limit. But it's only the CO. HC is fine. So that means the CAT is OK, right?
Member
iTrader: (2)
Joined: May 2008
Posts: 104
Likes: 1
From: Austin, Texas
Car: 87 GTA
Engine: L98
Transmission: Automatic
Axle/Gears: 2:73
Re: Can't pass AZ emissions
Cheap fix...12 oz bottle of Guaranteed to pass emissions test formula.
They sell it at AutoZone.
They sell it at AutoZone.
Joined: Dec 1999
Posts: 5,964
Likes: 37
From: Hacienda Heights, CA
Car: 90 RS 'Vert, 88 IROC-Z, 88 Firebird
Engine: 305 ci tbi, 305 ci tpi, 350 ci tpi
Transmission: WC-T5, WC-T5, 700R4
Axle/Gears: 3.45, 3.27, 3.27
Re: Can't pass AZ emissions
Thread
Thread Starter
Forum
Replies
Last Post
darwinprice
Organized Drag Racing and Autocross
17
Oct 11, 2015 11:51 PM
