MJ Comanche Tech. Stock & Modified. MJ (86-92)
All discussion regarding the Jeep Comanche, the pickup truck related to the Cherokee platform.

1987 Comanche please help

Old 03-18-2016, 06:59 AM
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Originally Posted by ck12sk
well sorry i tryed to explain it the best i could this thing is getting the best of me i am going to try a new crank sensor today
YOU are doing just fine. This is your first THREAD. I'm referring to the first POST someone made ( by njs) which cluttered this thread with crappy info.

Keep up the good work.
Old 03-18-2016, 07:06 AM
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Originally Posted by cruiser54
YOU are doing just fine. This is your first THREAD. I'm referring to the first POST someone made ( by njs) which cluttered this thread with crappy info.

Keep up the good work.
o ok thanks no prob
Old 03-18-2016, 05:12 PM
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Originally Posted by ck12sk
o ok thanks no prob
Well crank sensor didnt fix my problem and its reading 0.5 ac volts now still no spark or injector pulse
Old 03-18-2016, 06:01 PM
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Go to www.cruiser54.com and do Tip 3 and 4.
Old 03-19-2016, 07:31 AM
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Originally Posted by cruiser54
Go to www.cruiser54.com and do Tip 3 and 4.
I did tip 3 and 4 still nothing no spark or injector pulse this thing is being a pain what else could it be i even cleaned and added new grounds
Old 03-19-2016, 07:33 AM
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Could be a number of things. It's a process of elimination.

CPS signal runs through the C101. See tip 2.
Old 03-19-2016, 07:41 AM
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Originally Posted by cruiser54
Could be a number of things. It's a process of elimination.

CPS signal runs through the C101. See tip 2.
The c101 has been delwted we done that about three days ago and the ecm started my cousins 88 cherokee
Old 03-19-2016, 08:11 AM
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Look around the engine bay where the CPS connector is. You don't have a spare connector, do you?
Old 03-19-2016, 08:27 AM
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Originally Posted by cruiser54
Look around the engine bay where the CPS connector is. You don't have a spare connector, do you?
No i do not but planning to go to the junkyard today and see ifbi can find one this thing has just stumped me
Old 03-19-2016, 08:30 AM
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Originally Posted by ck12sk
No i do not but planning to go to the junkyard today and see ifbi can find one this thing has just stumped me
You misunderstood me and I wasn't clear.

Make sure there are not 2 CPS connectors in the engine bay. There was a Bulletin to run a new harness to the ECU for the cPS. Part of the job was to clip off the old CPS connector. Some guys didn't, so the CPS on yours could be plugged into a dead harness. Look around there closely.
Old 03-19-2016, 08:36 AM
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Originally Posted by cruiser54
You misunderstood me and I wasn't clear.

Make sure there are not 2 CPS connectors in the engine bay. There was a Bulletin to run a new harness to the ECU for the cPS. Part of the job was to clip off the old CPS connector. Some guys didn't, so the CPS on yours could be plugged into a dead harness. Look around there closely.
We didnt see but one we searched all over that are to make sure there wasnt an extra one or maybe one that it could have plugged into
Old 03-19-2016, 08:38 AM
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Maybe you should check to see if you have CPS signal at the ECU........
Old 03-19-2016, 08:42 AM
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Originally Posted by cruiser54
Maybe you should check to see if you have CPS signal at the ECU........
On the computer plug its the sync sensor that is the cps correct if so i know i have 7 volts on the b+ and a ground on the other
Old 03-19-2016, 08:51 AM
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Originally Posted by ck12sk
On the computer plug its the sync sensor that is the cps correct if so i know i have 7 volts on the b+ and a ground on the other
No. Sync sensor is something else.

C1 and D1

Look at the TSB below in the link
http://www.lunghd.com/Downloads_and_...-90-update.pdf

Last edited by cruiser54; 03-19-2016 at 08:54 AM.
Old 03-19-2016, 09:03 AM
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Originally Posted by cruiser54
No. Sync sensor is something else.

C1 and D1

Look at the TSB below in the link
http://www.lunghd.com/Downloads_and_...-90-update.pdf
Ok that nay be where the problem is then i will try when i get home later

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