Camaro Crank but no start

[aknight_sa]

suddenly had this issue with my 97 Camaro LT1 V8.

HISTORY
Engine was working normall but suddenly started to loose power.. then the engine went off and wasnt starting at all..

TROUBLE CODES
P0336: Crankshaft Position Sensor A Circuit Range/Performance – had it for some time
P0135: O2 Sensor Heater Circuit (Bank 1 Sensor 1) – due to removed O2 Sensor
P0141: O2 Sensor Heater Circuit (Bank 1 Sensor 2) – due to removed O2 Sensor

DIAGNOSES
1. at the begining suspected that the fuel pump wasnt working properly as it sounded lower than usual while turning the key to the on position, i currently dont have a fuel pressure gauge to check pressure. but when i opened the valve, the pump was pushing gasoline all over the place.

2. while checking ignition by removing one of the spark plug wires and bringing a grounded wire near the coil side.. no spark was jumping out of the coil (number one spark wire).. ofcourse that was while cranking the engine.. i then used an inline spark tester and it was showing spark but kind of looked very weak…

CONCLUSION
i do believe that the ignition is the problem as this type of engine is really known to have bad ignition “Optispark” system. how can i make sure 100% that this is the problem before buying a new coil or new optispark.

Topic

[aknight_sa]

[quote=”EricTheCarGuy” post=37217]Don’t assume that, with as little as a 3psi difference on some systems it can cause a no start. Check the fuel pressure and verify it with a pressure gauge to completely rule that out.[/quote]

Just tested fuel pressure and got 40PSI which in the operating range

[EricTheCarGuy]

Cool, now I suppose it’s time to verify the operation of the injectors. The only way to really do that is with a noid light. You may be able to borrow one from you local auto parts supplier. If all the injectors aren’t firing it may go back to the crank signal. Speaking of have you checked that at all?

[Author]

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