Will not crank

Tiny
REARDRIVE
  • MEMBER
  • 1992 CADILLAC DEVILLE
  • 4.9L
  • V8
  • 2WD
  • AUTOMATIC
  • 197,772 MILES
Drive about 15 miles go take care some business, I get back in the car it just turn over, wait about 20 minutes it will start up. What the symptom of a bad coil?
Thursday, August 20th, 2020 AT 12:15 PM

8 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

Does the engine crank over? Trying to see if you mean it will not crank or it will crank and not start.

https://www.2carpros.com/articles/how-a-starter-and-solenoid-works

https://www.2carpros.com/articles/car-cranks-but-wont-start

Roy
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Thursday, August 20th, 2020 AT 4:20 PM
Tiny
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The car will not start, you wait about 30 or 40 minutes then it will start. This happens about 5 or 6 times. No check engine light is on.
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Thursday, August 20th, 2020 AT 6:26 PM
Tiny
ASEMASTER6371
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Okay. Got it.

Again does the engine crank over when it does not start?

Roy
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Thursday, August 20th, 2020 AT 6:35 PM
Tiny
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Yes.
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Friday, August 21st, 2020 AT 2:38 AM
Tiny
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  • 93 POSTS
P/S I hear the idle control valve making tapping noise when I turn the key on and when I turn the switch off.
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Friday, August 21st, 2020 AT 2:46 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, that noise is normal for the idle control.

I would suggest replacing the ignition module in the distributor. That was a common failure for these back in the day.

I attached a picture of the location.

Roy

REMOVE OR DISCONNECT

1. Remove distributor cap and rotor.
2. Remove two module attaching screws.
3. Lift up module and stamped metal shield, if equipped.
4. Disconnect leads from module. Observe color code on leads as these cannot be interchanged.
5. Remove module.

NOTE: Be sure there is a sufficient amount of silicone grease on the metal face of the module and on the distributor base (where the module seats), when reinstalling the module. The purpose of the silicone grease is to cool the module.

INSTALL OR CONNECT

1. Install module.
2. Connect leads to module.
3. Install module shield, if equipped, and module attaching screws.
4. Install cap and rotor.
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Friday, August 21st, 2020 AT 3:54 AM
Tiny
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I replace this module Jan.30/2020. I guest I need another one. This time the motor did not cut off while driving down the street.
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Friday, August 21st, 2020 AT 5:23 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Make sure you get a good one. The cheap ones do not last.

Make sure you use the grease in the box for mounting it. It keeps it from overheating and failing.

Roy
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Friday, August 21st, 2020 AT 5:29 AM

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