Help on emissions on '94 Z28!
06-21-2008, 05:35 PM
#1
Teching In
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Help on emissions on '94 Z28! Ok, took it in for emissions test today and got back some really bad readings...not sure whats wrong. Anyone got any ideas?
(reading)/(allowed)
25/25 test
HC ppm = 1652/114
CO% = 1.11/0.63
NO ppm = 1795/796
50/15 test
HC ppm = 1184/117
CO% = 0.91/0.65
NO ppm = 1482/879
I have no idea and really need some help here, I got to get this thing on the road.
(reading)/(allowed)
25/25 test
HC ppm = 1652/114
CO% = 1.11/0.63
NO ppm = 1795/796
50/15 test
HC ppm = 1184/117
CO% = 0.91/0.65
NO ppm = 1482/879
I have no idea and really need some help here, I got to get this thing on the road.
06-21-2008, 08:20 PM
#2
Staging Lane
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My LT1 failed HC and CO about 2 weeks ago. What I'm doing is trying that "CRC Guranteed to Pass" Emissions formula (look it up), and if that doesn't pass me on the retest I'm gonna try seafoam.
And if that doesn't work then I'm pretty much screwed, but you should try the 2 options I gave since they're cheap and (usually) help people.
And if that doesn't work then I'm pretty much screwed, but you should try the 2 options I gave since they're cheap and (usually) help people.
06-22-2008, 09:14 PM
#6
Teching In
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Thanks for the input. I just did a full tuneup around 2 months ago, but I know how opti's can be so I am considering it. I am not throwing any codes though, so that is why I didn't really think it was the O2 sensors.
