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Old 10-15-2016, 11:42 AM   #1
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Default 93 Buick Park Avenue turn over but no start

I have a 93 Buick Park Ave 3.8l, turns over but no start, I have fuel to the rail, I've replaced the coil packs and plate. I've replaced the crankshaft sensor. It'* got a great battery. Still no spark.. Could it be the camshaft sensor and where is it located on this model
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Old 10-15-2016, 12:02 PM   #2
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The camshaft sensor is on the timing cover, above the harmonic balancer. It has no effect on the ignition system however. It'* only used to reference when TDC for #1 cylinder is passing by to synchronize the sequential fuel injection. The Crank position sensor does everything ignition related.

I would check over wiring and connectors. Also make sure you are getting power where you need it, and check grounds in that area as well.
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Old 10-16-2016, 08:57 PM   #3
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I agree with Rjolly87....cam sensor has nothing to do with spark.....

The crank sensor, ignition module, coils and wiring between them is what creates the spark....

The crank sensor has to trigger the ICM which controls the coils....you have to test for a signal for the crank sensor by manually rotating the crank....if the signal is there, then if power and ground is is present in the harness to the ICM, then you need an ICM....
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Old 10-16-2016, 09:05 PM   #4
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Quote:
Originally Posted by Tech II View Post
I agree with Rjolly87....cam sensor has nothing to do with spark.....

The crank sensor, ignition module, coils and wiring between them is what creates the spark....

The crank sensor has to trigger the ICM which controls the coils....you have to test for a signal for the crank sensor by manually rotating the crank....if the signal is there, then if power and ground is is present in the harness to the ICM, then you need an ICM....
I've replaced the coils, and the icm, and the crank sensor. Still no start. The connections seen to all be tight w/ no corrosion. Could it be a faulty replacement part? I'm at a loss on this car.
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Old 10-16-2016, 11:44 PM   #5
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Having fuel at the rail is different from having the correct pressure, have you checked this?


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Old 10-17-2016, 04:17 AM   #6
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Having fuel at the rail is different from having the correct pressure, have you checked this?


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Yes I have. I have good pressure, the issue is there is no spark, and I can't figure out why.
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Old 10-17-2016, 11:57 AM   #7
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This might help.

http://easyautodiagnostics.com/gm/3....-sensor-test-1

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Old 10-18-2016, 02:16 PM   #8
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If the parts replaced are all good then it'* either a wiring problem, connection problem, or power/ground problem....

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