). 
View Poll Results: Will deleting the EGR make me fail the sniff test
Yes
4
36.36%
No
7
63.64%
Voters: 11. You may not vote on this poll
Full emissions guys help please
Full emissions guys help please I have a 94 Z with full emissions an since i live in a county that i have to pass a sniff test this is my ? Will deleteting the EGR make me fail the sniff test? i plan on leaving the A.I.R. need some honest answers here guys thanks.
If your cat's are still good, you "should" pass, but why delete the EGR and keep the AIR? It's not going to give you anything.
Exactly...keep your cats. If they don't do a visual under the hood you should be just fine. If you delete the AIR/EGR it will throw a code and you will have to get it tuned out.
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Verdad Gallardo You have to pass the sniffer yes, but they will still hook up a scanner to your car and check for codes. If you had a code for the EGR/AIR, they won't even let you get on the rollers for the sniffer.
Just to let you know, it is easier to delete the AIR on headers than it is to delete EGR. To delete the AIR injection you just need two M22x1.5 bolts. EGR delete requires a bunch of blockoff plates.
I would suggest looking into MAC mid tube headers, they put down 28 rwhp and sound good. I recently installed these on my car and retained all the AIR, EGR, and put a high flow cat on there. I did this just incase I sell the car to someone like you that needs to do a sniff test.
I would suggest looking into MAC mid tube headers, they put down 28 rwhp and sound good. I recently installed these on my car and retained all the AIR, EGR, and put a high flow cat on there. I did this just incase I sell the car to someone like you that needs to do a sniff test.
On The Tree
Joined: Nov 2007
Posts: 130
Likes: 0
djjab, your sig said stock, so you don't have header or cat issues to worry about. EGR is enabled between 900 and 2200 RPM, and MAP greater than 36.2 for a stock '94 tune. The ODB1 sniffer test here in GA specifically test 0-25 MPH and 25-45 MPH cruising ranges where the EGR should be activated to decrease NO. I would guess Jersey is similar or close to that. I have tuning s/w so I have varied the on/off RPM/MAP ranges for EGR including turning it off completely. I can honestly say I can't feel any performance or driveability difference at the 25-45 MPH ranges . Since EGR cuts off at 2200 or if MAP falls below 36.2 it does not effect launches, low gear, takeoffs, top end or WOT situations. IMO the gamble that you will flunk the NO sniffer test without it, verses a small if any gain in a stock daily driver are not worth it. ALSO if you keep the cat then keep the air to prevent premature cat failure.
Last edited by bobdec; Jan 20, 2009 at 11:37 AM. Reason: spelling..
LOL dont look at all the oil its being taken care of Oil Pan Front & Rear Seals Timing Cover
and my car only came with one cat and it is there at the end of the Y Pipe under the cross member
and my car only came with one cat and it is there at the end of the Y Pipe under the cross member
Also, if you already have LT's installed with the emissions stuff hooked up to them, leave it alone, it's not going to rob any power or cause any problems to leave it the way it is. The only reason to delete it would be purely for aesthetics, and you already said you didn't want to deal with any headaches.
thanks for all the in put i will take your advice and put in another cat , put them at the front of the Y. And my reason for asking is the guy doing my work is tring to get me to take it off. Im sure its just because it would be easer for him to work on it
Emission style LT's are a bitch to work on, mainly because the EGR tube and the header connection in the back get's in the way of things, but they will help with the visual.
I failed the Ontario sniffer test with a stock motor and brand new cats because the EGR was not working limit was 400ppm mine was 424ppm. Some longtubes don't create enough back pressure for the EGR to operate properly. Once I put a cam in the motor it created its own EGR function and I didn't have any more issues. Heres some pics of my dual cats
looks like the same brand as my cats, i bought two but since my car only came with one i only put one on. i didnt thinks about it getting hot enough to work. and the h/c will be in the car in the next week or two
If you lose EGR with a stock cam/heads setup you will probably lose some MPG also... only good reason to do so is it limits the likelyhood of the rear seal of the intake manifold going bad and causing another oil leak... AIR same thing, you gain alot of nothing by doing that other than it looks nicer underhood...
Do it yourself if you must it costs about $12 for the nice plugs at NAPA..
Do it yourself if you must it costs about $12 for the nice plugs at NAPA..
