Mechanics

POSSIBLE VACUUM LEAK

2000 Chevrolet Blazer • 4.3L 6 cylinder 4WD Automatic • 160,000 miles

I have had my blazer sitting for about 7 months without starting it, I recently have begun trying to get it road worthy again. When I finally got it to start again, it sound like it has a massive vacuum leak by the throttle body and idles very inconsistently. It was very low on fuel so I filled up the tank and added a stabilizer to try and combat against bad gas. I replace the base gasket on the throttle body. I also did a smoke test to see if it would pull it in but I wasn't able to locate anything and no improvements with the little mechanical improvements I have done. I was wondering if it could be the egr valve? Map sensor? Or if you have any other things you may suspect? Thanks, Tim
Avatar
Helpmeinindiana
April 26, 2014.




Stabilizer doesn't do a thing for bad gas. It's a preventative to prevent the gas from going bad but it doesn't fix bad gas.
You probably want to start out with a fuel pressure test. This system is very pressure sensitive and requires a MINIMUM of 55 PSI at all times to even run. The spec is over 60.

Wrenchtech
Apr 27, 2014.


AD