Cranks but will not start. I replaced the ignition coil because of no spark?
RICK ECKERT
MEMBER
1998 JEEP TJ
4.0L
6 CYL
4WD
MANUAL
189,000 MILES
1998 Jeep Wrangler TJ, cranks but will not start. I replaced the ignition coil because of no spark. Replaced the crankshaft position sensor, will not start. I've ordered an ignition camshaft sensor.
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Sunday, August 14th, 2022 AT 2:43 PM
15 Replies
KEN L
ADMIN
So, it still has no spark? Have you run the codes? This guide will show you how so we can see what comes up:
It sounds like you may have an auto shut down relay that is not working. Here is the location so you can replace it to see what happens. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Monday, August 15th, 2022 AT 9:37 AM
RICK ECKERT
MEMBER
I found the ASD relay switched out with another like relay and still no start.
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Monday, August 15th, 2022 AT 12:33 PM
RICK ECKERT
MEMBER
Yes, no codes shown.
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Monday, August 15th, 2022 AT 12:36 PM
KEN L
ADMIN
If you turn the key on without cranking the engine over can you hear the fuel pump in the tank, come on for about 5 seconds? Also, have you checked for spark directly from the coil?
Have you checked for spark directly from the coil or at the spark plug?
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Thursday, August 18th, 2022 AT 2:18 PM
RICK ECKERT
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Yes, I have.
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Thursday, August 18th, 2022 AT 4:54 PM
KEN L
ADMIN
Okay, then we need to check for power and ground at the PCM because it sounds like the PCM is bad. Here is a guide that will help and the engine/PCM wiring diagrams below:
Check out the diagrams (below). Please let us know what happens.
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Friday, August 19th, 2022 AT 11:16 AM
RICK ECKERT
MEMBER
I found the ignition coil to the right of the box was defective. I picked up another one and l have spark, engine turns over but will not start.
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Sunday, August 21st, 2022 AT 4:34 PM
KEN L
ADMIN
If you spray starting fluid inside the intake will it run?
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Tuesday, August 23rd, 2022 AT 11:40 AM
RICK ECKERT
MEMBER
Thanks Ken. Since l had a bad coil right out of the box, l decided to check the distributor cam sensor. Yep, bad right out of the box, replaced it started right up. On the road again.
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Tuesday, August 23rd, 2022 AT 6:16 PM
KEN L
ADMIN
Nice work, we are here to help, please use 2CarPros anytime. Bad parts are tough to deal with, good job hanging in there.