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Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 15722
Experience:  15 years GM master tech
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1990 Chevy tahoe 5.7 L Engine won't start but

Customer Question

1990 Chevy tahoe 5.7 L Engine won't start but tries-sometimes will start and run for a few seconds then stop-Received Code P1351
Submitted: 1 year ago.
Category: Chevy
Expert:  Gary replied 1 year ago.

I am sorry for the long wait

usually with a code P1351 which is set if the VCM detects an unusually high voltage on the ignition timing signal circuit

( the white wire off the ignition module to the computer )

this type of issue will usually come down to a bad ignition control module and a few with shorted or bad white wires and a few very rare bad computers

visually inspect the wiring off the ignition coil and ignition module if the wiring looks good replacing the ignition module usually corrects this kind of issue

Customer: replied 1 year ago.
Where is the Ignition Control module located?
Expert:  Gary replied 1 year ago.

its located next to the ignition coil

i circled it in this picture

Expert:  Gary replied 1 year ago.

how are you making out ?

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