Quote:
Originally Posted by Skippy
Sounds like your smog guy may have accidentally dislodged a vacuum hose or something under the hood. Get in there and look. Post pics if you can. That will get you back to your original problem of not passing smog. The high NO points to an EGR problem. Maybe not opening, not opening enough, or the passages are too clogged. All three are fairly likely on a 30 year old car.
|
EGR was checke & is working ok
Quote:
|
The high HC leads me to believe your fuel mixture is too rich. I'm not very familiar with the type of fuel injection your car has, but there are several things generally that can go wrong to cause that issue. Aging O2 sensors will do it, but you have a newish one, so it's unlikely to be that. MAP and/or MAF sensor failing could also be a culprit, as could a bad coolant temp sensor telling the computer to run cold fuel enrichment after the engine is warm. Pull codes if you can. On an OBDII system, this would be stupid easy.
|
O senser did fix same problem in 2009 so maybe it needs replacing again?
It has been sugg that mix is too lean?