Failed emision test
08-11-2008, 10:56 PM
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Failed emision test Its a 94 a4 z28 with 110,000 on it. I got from my friend for free (sort of ) It needed a tranny,fuel pump,front bumper,fender and hood. I got all that taken care of now and got a chance to take to get it tested. The car has been sitting a while (maybe a year)? So it still had some of that old gas in it so I'm sure that
has something to do with it but not all. I'm not sure if it's ever had a tune up at all! I'm getting that taken care of this week new plugs and wires! I also put some fresh 91 in it. So is there anything else that I might need to take care of?
has something to do with it but not all. I'm not sure if it's ever had a tune up at all! I'm getting that taken care of this week new plugs and wires! I also put some fresh 91 in it. So is there anything else that I might need to take care of?
08-11-2008, 11:13 PM
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Id start where your starting, considering you know what the car needs... If you already KNOW it could use a tuneup and a fresh tank of gas then do it, drive it to get the cobwebs out, and see what happens.
It should tell you what reason the car failed (O2/HCs/NOX ect...) which was it? That helps alot when trying to diag a failed emissions test.
It should tell you what reason the car failed (O2/HCs/NOX ect...) which was it? That helps alot when trying to diag a failed emissions test.
08-11-2008, 11:55 PM
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If you failed hydrocarbons and carbon monoxide alot of unburnt fuel is getting out the exhaust (for whatever reason, cat being bad maybe or just too rich).
Tune it up and get some new gas in it, check your air filter also to make sure its not something stupid. The tune up alone should get you somewhere.
Tune it up and get some new gas in it, check your air filter also to make sure its not something stupid. The tune up alone should get you somewhere.
08-12-2008, 12:05 AM
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Filter is a new LPE intake the original air intake didn't make it out of the wreck.
The exhaust has a pretty strong smell to it when it idles. But other than that it
runs pretty strong from a stop it gets sideways and even spins second gear.
This is my first lt1 and I'm impressed how it goes for as old as it is lol
The exhaust has a pretty strong smell to it when it idles. But other than that it
runs pretty strong from a stop it gets sideways and even spins second gear.
This is my first lt1 and I'm impressed how it goes for as old as it is lol
08-12-2008, 12:11 AM
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Its going to run a whole hell of alot better when you get that rich condition sorted out. If the car is stock, there should be a very light fuel smell, if any from the tailpipes. If its never been tuned up at all, that would be a real good reason for smelling unburnt fuel at the other end.
It could be alot of other things too, but its obviously better to start with the basics and make sure its not anything you already know about.
It could be alot of other things too, but its obviously better to start with the basics and make sure its not anything you already know about.
08-12-2008, 12:21 AM
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Ya hopefully this will take care of it. I want to get it to the track this weekend and see what it will do.
All it has is the intake. The tranny came out of a cop car so Im not sure if that makes any difference or not?
All it has is the intake. The tranny came out of a cop car so Im not sure if that makes any difference or not?
