I have check the EGR vavle, it's working. Well I had a shop look at it and they said the timing was off. I let some one diagnose the problem but I'll be fixing it.

I went to do the timing and I can't get the timing mark to hit top dead center it's either way over or way under.

 

Well what is your exact problem? What isn't passing?

 

You can't change the timing on these engines...

 

It is very rare to have the timing off, unless the motor was taken apart. Are you getting any codes or its just not passing the exhaust emissions?

 

First of all timing is completly controlled by the PCM so if your timing is off you either got a faulty sensor, timing chain ( it would run very very poorly), or you pcm is bad.

But that aside what did you fail for? Visual? Functional? HC, CO, Nox?

 

it runs like a champ....it's not passing NOx gas which is exhaust. I've checked the egr and vacuum line's and am about to put a new catalytic converter on it. It's has around 1300 to 1800 ppm on the NOx and it needs to run between 800 and 900.

 

Where would the PCM be located?

 

Under the hood on the passanger fenderwell.

 

I used to cheat the exhaust testing by adding VP or a strong Octane booster, and about the catalytic converter, I dont have one and still pass emissions.

 

Changing the Cat would not be a bad idea. Good luck with it.