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Jerry Newton
Jerry Newton, Chevy Technician
Category: Chevy
Satisfied Customers: 4412
Experience:  ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
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Chevrolet Tahoe 4x4: i have a 03 tahoe 5.3.it has injector

Customer Question

i have a 03 tahoe 5.3.it has injector pulse but no spark.i checked all injector/coil wires and grounds.im thinking pcm is bad.truck shut down driving down the road,towed into shop cranks no start no lights on dash no codes.im bill
Submitted: 1 year ago.
Category: Chevy
Expert:  Jerry Newton replied 1 year ago.
Check ground G102, which attaches to the side of the engine block on the driver's side. Historically, when you have no spark, it's because there is something wrong with this ground. It's unlikely, though not impossible, that you have a faulty PCM that's causing this. Much more likely to be a coil ground issue.
Customer: replied 1 year ago.
ok i rechecked the ground and found it was bad.when i ohm'd it i found a high reading but i did not think it was high enough to cause a problem thank you for your help it was right on.bill
Expert:  Jerry Newton replied 1 year ago.
Excellent, thank you for the followup!

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