1997 GMC C1500 Repair Question
Topics covered: Compression, Fuel pressure, Spark.
Mileage: 450,000 miles.
Mileage: 450,000 miles.
Asked on March 1, 2013
GMC C1500 Compression Problem
I replaced spark plugs,wires,rotor button,cap etc and still have a miss in number 5 and 7 after it warms up. works fine when cold. i even had injectors flushed.
Asked by (pending member)Answer
Replied on March 1, 2013
check compression in those cylinders acheck fuel pressure if low causes this, check for a vacuum leak.
