DESERTXJ206

Falied emissions

Hydrocarbons and the other one both failed. I can get all the %s of each that failed.

DESERTXJ206

On the v8 where do i start looking for issues?

Its a friends vehicle and iv only messed with the I6.

Jgcdude1

Happened to me, no engine codes either. I replaced oil, plugs, and O2 sensors, to no avail. In short, turned out to be bad cat. You can pick one up for around 100 or so. I would try replacing that first.

Good luck

DESERTXJ206

The weird thing is my friend went back there with no changes 2 days later and passed. So idk what his issue was. But ill be doing the tune up anf stuff anyways.

ol"blue

This may be of help. >http://www.jeepforum.com/forum/f13/f...h-nox-1036286/

Also, your '95 V8 ZJ has an EGR system. Don't know if that's part of your issue, but the following explains it, how to check it, and replace it if needed.

basegrinder

easy one to miss-- make sure you get your car up to FREEWAY speeds for *at least* 20 mins before. I drove around in my Acura for 20 mins on the street and the tech told me I barely passed and he could tell just from experience the engine wasn't hot enough to really start burning things off.

DESERTXJ206

Well his zj passed the next morning. Im thinking it was engine temp related. But its all taken care of now guys thanks i appreciate it.

ol"blue

Glad to hear it passed.