1998 GMC Jimmy Envoy 6 Cyl 4.30L
Changed the fuel pump only had 40 pounds of pressure put new one in still has lack of power wont go up hills a
put fuel pump in,changed oil and transmisson fluid... was reading cylinder 1 missfire cleaned up distributor cap and rotor went away its also doing it on t he flat as well its like it has a lack of power check engine light is not back on
What is the fuel pressure with the new pump? Can't be sure it is a fuel issue, but, that spider fuel system is noted for problems. Do you have good compression, how many miles on the vehicle?