Question about Pontiac Firebird
1. This is a problem with either the injector or wiring.
2. You need a multimeter to test the electrical wiring in the injector and then the loom.
3. If it is an open circuit in the injector the only way around it is to replace the injector,these are not able to be repaired.
4.If it is an electrical issue then you need to trace the wiring back to the main connector in the engine bay, and check the wiring for continuity, if thats ok then you need to check the wiring from the main connector to the ECM. If this is ok then the fault will be in the ECM which you will need to replace. Check ECM output voltage to the injector with the key on, if it measures more then 4.5 volts across the wiring then all the wiring is ok. You will need to replace the injector.
5. Yes it will pay to replace the o-ring but it is only 1 oring so it shouldn't be that expensive, also you don't need any special tools just a good set of open end spanners etc.
So check the voltage to the injector first.
Then check the injector windings, then the wiring.......
Hope this helps, let me know if you need more information.
Posted on Sep 16, 2010
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Posted on Jan 02, 2017
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Operating the vehicle over a wide temperature range may help isolate the fuel injector that is causing the condition.
Perform the fuel injector coil test within the conditions of the customer's concern. A fuel injector condition may only be apparent at a certain temperature, or under certain conditions.
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