1998 Buick Century no injector pulse.

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3 months 4 weeks ago - 3 months 4 weeks ago #203179 by GM guy
I need to pick some brains today. Got a 98 Century with a crank, no start with no injector pulse.

Diagnostic chart points to bad PCM. PCM, ignition module, 7x crank sensor and cam sensor have been replaced. 3x signal wires between ignition module and PCM have been restrung including new terminals with injectors still not pulsing. checked all injectors with AFIT and resistance of all injectors is between 12.1 and 12.5 ohms injectors have power to them. Car will run on starting fluid.

Anyone got any ideas on the theft system and if it could cause just the injectors not to pulse?
Last edit: 3 months 4 weeks ago by GM guy.

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3 months 3 weeks ago #203242 by college man
Replied by college man on topic 1998 Buick Century no injector pulse.

Believe it or not Iam trying to help you.

Proud to be Eric The Car Guy Certified.

Over 10,000 posts strong.

Mobil1 New Jersey highway tested everyday.

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3 months 3 weeks ago #203244 by GM guy
Replied by GM guy on topic 1998 Buick Century no injector pulse.
I finally ran down the problem. It was an ignition feed to the PCM. There is nothing in any publications that references this and the PCM was communicating with the scan tool. i finally went back and starting checking all the power and grounds at the PCM and found an open between the underhood fuse block and the PCM. Circuit 438 I believe.

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3 months 3 weeks ago #203247 by college man
Replied by college man on topic 1998 Buick Century no injector pulse.
Glad you found the problem.

Believe it or not Iam trying to help you.

Proud to be Eric The Car Guy Certified.

Over 10,000 posts strong.

Mobil1 New Jersey highway tested everyday.

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3 months 3 weeks ago #203249 by relative4
Replied by relative4 on topic 1998 Buick Century no injector pulse.
Nice work, that was a tough one.

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