No spark from coil?

BETTYRAZO

MEMBER
1986 JEEP CJ7
6 CYL
4WD
MANUAL
100,000 MILES

86 cj7 with 96 eng. No carb, has injectors: rep coil, elect system coil, battery charged. No spark out of the coil. Repled the buzzer as well. Veh has no points. What could be wrong

Monday, January 6th, 2025 AT 10:58 AM

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
50,162 POSTS

When you say with 96 engine can I ask which engine and control system are you using? Can you upload an image? Did you check the fuses?

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Tuesday, January 7th, 2025 AT 10:41 AM

BETTYRAZO

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3 POSTS

Thank you for your response. The fuses have been checked, they are okay. The jeep engine is a 97 jeep wrangler.

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Tuesday, January 7th, 2025 AT 3:06 PM

KEN L

MASTER CERTIFIED MECHANIC
50,162 POSTS

Does it have the 97 jeep wrangler ECM and wiring harness?

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Thursday, January 9th, 2025 AT 10:27 AM

BETTYRAZO

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3 POSTS

I assume so.

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Saturday, January 11th, 2025 AT 3:41 PM

KEN L

MASTER CERTIFIED MECHANIC
50,162 POSTS

I have seen the crankshaft angle sensor cause this problem, but we should check for 12 volts at the coil.

Please use this guide to check the positive side of the coil with the key on, (dark green/black wire).

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Here is the location of the crankshaft sensor if you want to try swapping it out. Check out the images (below). Please let us know what happens. I would check the wiring to the sensor as well.

Images (Click to make bigger)