No spark?

Tiny
INTERNETMECHANIC
  • MECHANIC
  • 700 POSTS
Check mil codes, see if anything shows up. Check primary voltage at coil and injectors, engine cranking. The dark green wire with orange tracer should be hot. Yes, the crank sensor could cause a problem.
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Monday, December 7th, 2020 AT 12:22 PM (Merged)
Tiny
TWEETY33
  • MEMBER
  • 1 POST
  • 1994 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
94 jeep have changed coil, dist cap and rotor wires and plugs I have tested power to coil get it only first couple seconds when turn key to crank and only cranks in neutral. What do you think it could be?
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Monday, December 7th, 2020 AT 12:22 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome to the forum, check the primary voltage to coil and injectors, that voltage comes from asd relay. The relay may be fine, if the computer doesn't see the proper cam and crank signal, it may not ground that relay. Check for codes, see if it points any direction?
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Monday, December 7th, 2020 AT 12:22 PM (Merged)
Tiny
KAH420DOPEY
  • MEMBER
  • 1 POST
I have a 1994 Jeep Cherokee and had the same issue. After reviewing 10 or more forums I came to the conclusion of the Crank Shaft Position Sensor. I took it in to a shop to do the repair since it was a difficult part to replace.
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+1
Monday, December 7th, 2020 AT 12:22 PM (Merged)
Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
I appreciate you sharing the solution to your issue.

Here are a couple of helpful articles:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor
https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

I have attached the diagrams for replacement procedure below for anyone else who might be looking for this information.

Thank you.
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Monday, January 31st, 2022 AT 1:14 PM

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