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Unread 03-06-2015, 02:00 PM   #1
Shiny
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1989 YJ Wrangler 
 
Join Date: Feb 2015
Location: Shawnigan Lake, BC
Posts: 21
89 YJ 2.5 no spark, no fuel

I dont like puters at all...
So I would be driving along and the Jeep would die for a few seconds then would come back to life. It is like I shut the ignition off, once in a while it would even backfire threw the exhaust. So it has done this on and off for a while now. Well yesterday it died while I came to a stop, I could hear the fuelpump turn on and then it fired up, I backed up about 20 feet and it died again, then it started back up, pulled forward to park and it died again. Now there is no fuel and no spark. Fuel pump is turning on. It does have power to the coil, but no spark. I pulled the CPS out and it was pretty oily and dirty. Gotta figure out how to clean the flywheel inside? Any ideas? It was also idling at 1400rpm for a while, right before it died.
Few weeks ago it died, but it was getting spark but no fuel. Ended up going thru a bunch of things, and cleaned up some stuff, put it back together and it fired up. Not sure what it was.
I have read alot of write ups and still unsure what it is. I do not have a OHM tester.
Thanks in advance

-Shiny

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Unread 03-06-2015, 02:20 PM   #2
Jeepsr4me
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Does your check engine light come on?


You dont really need to clean the oil in the flywheel area.. It has no effect on the system.

BUT if you just got to. take a can of brake clean and spray in there with the nozzle. I put a piece of tape on the nozzle so if it came off it will not go in the hole. (not that it would matter..) Also while spraying in there get someone to crank it, make sure out of gear...
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Unread 03-06-2015, 02:32 PM   #3
mike134
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1989 YJ Wrangler 
 
Join Date: Aug 2014
Location: Cleveland, OH
Posts: 2,413
It certainly has the symptoms of a CPS problem.

is this happening at low speeds only? An oily flywheel can make your clutch stick. Are you sure its fully disconnecting?

Run the vehicle at idle, grab the CPS wires and jostle them around. Does the engine turn off?

Also, check jeepsr4me's suggestion of engine light just to be sure. Is it throwing any codes? does the CEL turn on when you first turn the key to the ON position?
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Unread 03-06-2015, 03:37 PM   #4
Shiny
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1989 YJ Wrangler 
 
Join Date: Feb 2015
Location: Shawnigan Lake, BC
Posts: 21
Its dead, no spark and no fuel as I said above. The intermittent dying has gone on for a while, and would happen at normal driving speeds, like 40mph. Cleaned the CPS, but it wasnt that dirty, pulled the inspection cover and it wasnt oily in the bell.
Its an '89 so doesnt have engine light
If it was the ICM, would it send a signal to not pump fuel? Cuz there is no spark at the coil

-Shiny
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Unread 03-06-2015, 05:50 PM   #5
Jeepsr4me
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Could have swore it had a light
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Unread 03-06-2015, 06:07 PM   #6
mike134
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1989 YJ Wrangler 
 
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Quote:
Originally Posted by Jeepsr4me View Post
Could have swore it had a light
he's right, it didn't get CEL until 1991
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Unread 03-06-2015, 09:42 PM   #7
Johnnyrev
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1994 YJ Wrangler 
 
Join Date: Mar 2015
Location: Alaskan-Stuck-in-TX
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You said it's like turning the key off and on.. well, a deteriorating ignition switch can make this happen too, both the ignition and fuel pump are switched on by it. It's down on the steering column under the dash, the key turns a tumbler that moves a rod that eventually moves a sliding ignition switch.

You've probably wiggled the key and tumbler already when it happens, but check to see if the switch itself has a crack, wires to it are loosening or coming apart, it's barely held on to the column, etc.
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Unread 03-08-2015, 01:56 AM   #8
Shiny
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1989 YJ Wrangler 
 
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Location: Shawnigan Lake, BC
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I will check that tomorrow. But why would it have power to the coil? So frustrated!
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Unread 03-08-2015, 07:13 PM   #9
Johnnyrev
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1994 YJ Wrangler 
 
Join Date: Mar 2015
Location: Alaskan-Stuck-in-TX
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Intermittent problems are the most frustrating. Just do a visual check, do a little tug on the wires and make sure the fuel pump and coil have power, and move on. If it isn't a new coil and you haven't checked the coil for continuity (you can use a volt meter and system power to do it) then check it just to rule it out.
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Unread 03-08-2015, 08:32 PM   #10
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
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Trying to troubleshoot a no start electric issue without a meter is like going to an exclusive restaurant without your wallet. You need to see if you have voltage on the coil. How do you know you have no fuel?
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Unread 03-29-2015, 08:32 PM   #11
Johnnyrev
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Just wondering if you resolved this issue. Another post http://www.jeepforum.com/forum/f12/1.../#post29206625 brought it back to my attention because the ignition switch connects pretty much the same way, so it may have a corroded contact.
__________________
Measure it with a micrometer, mark it with a crayon, cut it with a hatchet.
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