Help!!

david07 · 04-22-2002, 10:06 AM

Just got these results back on the smog test on my newly rebuilt engine. Can anybody tell me what they mean and where to start with fixes??? Car is '83 5.0 with Holley carb (rejected slightly up), 3/4 cam and long headers.

NOS 4413 PASS
HC 344 FAIL
CO% 4.8 FAIL (BIG TIME!)
02% 0.9
C02% 11.3

thanks.

byrnech · 04-22-2002, 10:12 AM

You need to tell us what aftermarket parts you have on it, i.e. camshaft. Also if you have the cats still on it or not. I am assuming you do since you are smogging it.

PKRWUD · 04-22-2002, 10:13 AM

Was there an oxygen (o2) reading too? You're running very rich, but if your O2 level is less than your CO level, your cats aren't any good.

What's your story?

04-22-2002, 10:06 AM	#1
david07 Registered Member Join Date: May 2001 Location: new york, new york Posts: 5	Help!! Just got these results back on the smog test on my newly rebuilt engine. Can anybody tell me what they mean and where to start with fixes??? Car is '83 5.0 with Holley carb (rejected slightly up), 3/4 cam and long headers. NOS 4413 PASS HC 344 FAIL CO% 4.8 FAIL (BIG TIME!) 02% 0.9 C02% 11.3 thanks. Last edited by david07; 04-22-2002 at 10:27 AM..

04-22-2002, 10:12 AM	#2
byrnech Registered Member Join Date: Jun 2001 Location: Anderson, TX. Posts: 166	You need to tell us what aftermarket parts you have on it, i.e. camshaft. Also if you have the cats still on it or not. I am assuming you do since you are smogging it. __________________ 331 10:1, AFR 185's, TFS-R intake

04-22-2002, 10:13 AM	#3
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Was there an oxygen (o2) reading too? You're running very rich, but if your O2 level is less than your CO level, your cats aren't any good. What's your story? __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!