should i set the timing to stock?

 

yes to stock and make shure that the cam timing is on.

 

Before you go out and buy any parts,try this BG stuff.It might help.Check out how much it lowered the HC and CO (HC went from 1.41 to .66 and CO went from 11.94 to 6.33) on a Emissions Dyno test I did on a POS 91 Cadillac with a 4.9L..Try to use it right before you test it,If the guy who's doing the test will let you do it on the dyno,great,if not do it like a block away..You spray 1/2 the can into the throttle plate with it open and close with engine off and then the rest of it after you start it...I love this stuff,I call it "tune up in a can" ..The BG Part # is 4068

 

damn, where do i buy that. i'm gona use that and some "guarenteed to pass" from a local auto parts store.

 

that garranty to pass stuff hasnt worked for me,I tried it on several cars with little effect......one last thing,just make sure you get the same exact BG stuff,not any old intake cleaner you find.

 

aright, well where do i buy that tune up in a can stuff?

 

lots and lots of places sell it,A lot of dealers and service stations carry it or just use a online search engine and put in BG Air Intake Cleaner..I did that and found these two places...
http://www.3sxperformance.com/fluids.asp
http://www.carfood.net/fuelsysclean.html