Engine Performance problem
1995 Chevy Astro 6 cyl Two Wheel Drive Automatic 166055 miles
I have a 95 Chevy astro van with the 4.3 vortec engine with spider cpi. It shutters at about 58 mph. I have replace the tps, iac, fuel filter, intake and valve cover gaskets, fuel pressure regulator, and all vac lines. I also checked the fuel pressure with key on it goes to 62 psi. At idle fuel pressure is at about 56 psi and goes up to 58 psi with trottle snap not sure what fuel pressure should be. Also if you give it trottle in park engine shutters at about 1700 rpm. Can you please help
have the same problem?
Friday, March 6th, 2009 AT 8:59 PM