Question about GMC Cars & Trucks
Place a spark plug tester in your number #1 ignition lead and confirm spark.- No spark = possible ignition module failure if spark from coil is present.
Test the fuel line pressure for 12 PSI.for throttle body fuel injection systems on 1987 to 1995 - If reading is low replace fuel pump. If reading is zero lbs check relay.
Compression test for acceptable compression.
If you have spark, fuel and compression, static time the engine and try again to start the vehicle.
PS: If your vehicle is a standard shift you have a clutch safety switch and a column mounted ignition switch that should also be considered.
Here is some more info that may help:
How to Test the Fuel Pump on GM TBI Fuel Systems How To Check Engine Compression GM 3 5L 4 2L
Posted on Aug 12, 2017
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Posted on Jan 02, 2017
usually when coil dies the computer shuts off fuel pump to stop you catalytic converter and engine filling up with gas! do you have a eng light on if so scan with:OBD 2 scan to retreve you problem don't get$$ any how do you have SPARK when coil is connected?have you tested with a spark tester tool not spark plug not efficient!!! also have you tested all the in car fuses and under hood fuses with circuit tester tool not pulling and looking!???good place to start!
Posted on Jan 10, 2009
SOURCE: 2001 gmc jimmy not starting
Did they do a fuel pressure pressure test to determine that its fuel pump? And if so what was the p.s.i.?It should be around 55 to 60 p.s.i. a few pounds under 55 p.s.i. Pump needs replaced, Your shop should have chk. this when it was there the first time. Did they by chance chg. the fuel filter, that can hinder it from starting too.
Posted on Feb 14, 2009
Testimonial: "it was the fuel pump thank you"
check the battery an make sure its holding a charge and test the alternator and checkout the starter to make sure its good and not drawing on the battery
Posted on May 16, 2009
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