Join Date: Jun 2009
Location: Saipan (!)
Mad Max is offline
Re: Cant find this miss...
If you have a burnt valve, this will cause the problem. Any vacuum leak will also be an issue.
Your brake booster diaphragm might be leaking - any issue with the brake pedal feel?
If you have the tools, try a compression test.
You can take carb cleaner and spray around the base of the TB, and check any connections. You're sure the firing order is correct?
Oh, and a worn camshaft can also cause this problem. Easy to tell... Pull a valve cover (one at a time) and run the engine. Look for a rocker arm that is barely moving. This is not uncommon since modern engine oils have no zinc any more. Zinc is a high pressure additive that prevents wear...
2.8s have flat tappet cams that are prone to wear.
Hope this helps...
Confucius say: Man with bad camshaft not pass smogs...
1)'82 S10, 383, 700R4, Shorty
2) '85 S10, 3.4, 700R4 4x4 stretch cab (Redneck)
3) '90 S10 2.5, 5 speed shorty
4) '91 S10, Built 3.4, 5 speed shorty (Voodoo)
5) '92 S10, 2.5, 5 speed shorty, (Barbie)
6) '92 S10, 2.5 5 speed, Shorty
7) 1979 LUV, Buick 3.8 V6, TH 350 Shorty.