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No check engine light

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Old 11-05-2014, 12:02 PM
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Skyhigh82
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Default No check engine light

Car doesn't start, when to check codes and no check engine lite. Checked fuses all ok. Guess next thing is to pull the ECM and start probing.
Old 11-05-2014, 12:53 PM
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AzMotorhead
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We can only ASSUME your car comes with one? No details about what you have. So everyones guess is as good.
ASSUMING your car is equipped with a CEL. Does it illuminate when you first turn the key?
if NO check the bulb.
Things that wont illuminate the CEL Fuel, Spark ,or air. everything needed to make engine run.

DOes engine turn over? Crank but no fire?
Or should we keep trying to be mind readers
Old 11-05-2014, 01:50 PM
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MelWff
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do you have spark at the plugs? do you see evidence of fuel at the throttle bodies?
Old 11-05-2014, 02:38 PM
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Easy Mike
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Originally Posted by Skyhigh82
...Car doesn't start, when to check codes and no check engine lite...
Tell tale bulb might be burned out.

...Guess next thing is to pull the ECM and start probing...
Why not check for stored error codes in the computer before pulling things apart?

Old 11-05-2014, 09:46 PM
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kcb37
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I would agree you are trying to get ahead of the horse when your tied to the back of the wagon.

Before you start tearing apart everything check for air/fuel/fire.
What are you missing?
Old 11-05-2014, 11:05 PM
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crashdog172
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Check ecmb fuse if it has one
Old 11-06-2014, 08:18 PM
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Duane4238
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If it's cranking but no start, check that you're getting fuel. If yes, pull the dist. cap and take out the ignition module and go to your nearest Autozone (OR whatever) and have it tested. The ignition modules go with no warning and are an easy replace and fairly cheap. Good luck.
Duane
Old 11-07-2014, 02:24 PM
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Skyhigh82
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Thanks everyone, Duane, it was the ignition module. 82 running but still no check engine lite....guess i'll check bulb.
Old 11-07-2014, 07:22 PM
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Duane4238
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Glad to hear you're back on the road. My '72 is put away until the spring. Forecast is for snow, tomorrow.
When you turn your key to the on position "before" starting, look and see if the check engine light is "on". It should be lit and then go off when the engine is started. GM's way of allowing you to check that the bulb is working. Good luck.
Duane
Old 11-07-2014, 07:27 PM
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Amorget
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Also to note, a dead ICM normally won't cause the ECM to throw a code (at least in my experience).

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