How do you know if the problem with starting is the fuel pump or fuel filter? on 1998 GMC Envoy

My vehicle has fuel, will crank but not start. I hear the fuel pump kick in when I turn the key. Had the battery checked and ruled out. Is it the fuel filter or fuel pump?

by in Akron, OH on November 04, 2012
2 answers 2 comments
ANSWER by on November 04, 2012
check your fuel pressure if they are good and strong, then check if you have spark.
COMMENT by on November 04, 2012
How and where do you check the fuel pressure?
ANSWER by on November 04, 2012
On your 4.3L engine, the fuel pressure check valve is on the fuel rail...fuel pressure should be 56-66psi when powered up...most likely it will be a failed fuel pump because that is a common GM Truck issue. When changing fuel pump, fuel filter replacement is recommended.
COMMENT by on November 05, 2012
SEE IF IGNITION FIRE IS PRESENT FIRST, THEN CHECK FUEL PRESSURE WITH A FUEL PRESS. TEST GAUGE. TEST PORT IS ON THE FUEL LINE LEFT REAR OF ENGINE. PRESSURE SHOULD HOLD AFTER KEY IS TURNED OFF. IF NOT COULD BE FUEL SPIDER PROBLEM. PRESSURE NEEDS TO BE AT LEAST 50 PSI TO START THE ENGINE.