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Dave Nova
Dave Nova, Pontiac Technician
Category: Pontiac
Satisfied Customers: 18825
Experience:  ASE Master Certification. GM World Class Certification
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Pontiac Grand Prix: engine will not rotate when trying to start

Resolved Question:

engine will not rotate when trying to start already replace neutral start switch. starter and battery check good.
Submitted: 1 year ago.
Category: Pontiac
Expert:  Dave Nova replied 1 year ago.

Hello and thank you for trusting me with your question. My name is XXXXX XXXXX I will do my best to help you with your Pontiac problem.

.

Does your key have a security chip in it?

Customer: replied 1 year ago.


yes there is a security chip

Expert:  Dave Nova replied 1 year ago.

Remove glove box and look above it in the dash. There you will see the theft deterrent module and relay. Unplug the relay and jumper the thick yellow and purple wires together, then try starting the engine. It will likely start and then stall. Let me know what it does.

graphic

Customer: replied 1 year ago.


It started and then stall

Expert:  Dave Nova replied 1 year ago.
That is what I suspected would happen This means the theft deterrent module is shutting down the starter and fuel injector controls. The common problem is breakage of the wires coming off the igntion lock cylinder. These wires carry the signal from the chip in the key to the antitheft module. The fix is either to replace the ignition lock cylinder, or to bypass the wiring with a resistor as shown in the diagram below.

graphic


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Dave Nova, Pontiac Technician
Category: Pontiac
Satisfied Customers: 18825
Experience: ASE Master Certification. GM World Class Certification
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