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Unread 04-24-2008, 10:12 AM   #1
DuaneJ
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Why won't my Jeep start after new starter? (starter works, no spark??)

Hello

I'm a brand new Jeep owner, just picked up a 1992 Cherokee the other day.

It required a few basic things (battery, starter, tires, etc.).

I just put the new starter in this morning. With the new battery and starter, the motor spins really well. However, it won't fire off. No problems with starting before the new battery and starter.

What in the world could I have screwed up by just replacing the starter? I can't possibly see leaving the battery disconnected overnight causing a problem ?!?

It's not fuel, I pulled the line off and there's plenty of fuel incoming.

Any ideas or things I should try?

Thanks in advance for lending a hand to a Jeep newb.


Last edited by DuaneJ; 04-24-2008 at 11:21 AM.. Reason: clarification
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Unread 04-24-2008, 11:02 AM   #2
DuaneJ
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After doing some research, it seems there's something called a crank position sensor that can cause this phenomenon?

Could I have jacked that up by disconnecting the battery?
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Unread 04-24-2008, 01:38 PM   #3
DuaneJ
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Yet another update...

I have spark. I've got to find a fuel pressure gauge to check pressure.

Is it just coincidence that this started after changing my starter? I'm still thinking I must have done something ...

Anybody take a stab at this ??
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Unread 04-24-2008, 10:21 PM   #4
XJ4oh
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Leave the ground wire(s) disconnected accidentally? Possibly shorted something out?
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Unread 01-05-2010, 08:59 PM   #5
jeepitup1
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Oxygen sensor might be bad?
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Unread 01-05-2010, 09:01 PM   #6
631XJ
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oxygen sensor and coolent sensor go hand and hand you get em checked out ... mayb nuetral saftey switch? just got all of these sensors and switches replaced in my 97 jeep starts and runs perfect now
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Unread 01-05-2010, 09:09 PM   #7
robdoggydog1
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have you tried to start it in nuetral? also check if any wires on the starter moved while you were tightening they may be grounding out or shorting.touching eachother .
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Unread 02-11-2012, 04:02 PM   #8
Mdeez415
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I am having the same problem, I started a similar thread... check it out http://www.jeepforum.com/forum/f11/helllp-1323954/
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Unread 02-11-2012, 06:24 PM   #9
tjwalker
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Quote:
Originally Posted by DuaneJ View Post
Yet another update...

I have spark. I've got to find a fuel pressure gauge to check pressure.

Is it just coincidence that this started after changing my starter? I'm still thinking I must have done something ...

Anybody take a stab at this ??
Is your spark a strong, blue snapping spark? Yellow/orange/white indicates a weak spark which may not be strong enough to start the engine.

If spark checks out (and only if), then try a bit of starting fluid into the intake or a splash of gas. If the engine starts and runs momentarily with this technique, you have identified a FUEL DELIVERY problem.

The above tests are really necessary to help isolate the issue.
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Unread 02-11-2012, 06:34 PM   #10
DezertXj88
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Did said jeep start before the parts were replaced?
All grounds checked, cleaned and tightened?

My jeep would crank for days, just wouldn't turn over. Mine is a 88/89 and it turns out I shorted out my ecu somehow. My point is, it can 1 of a million things. Time to start the process of elimination. I'd follow advice in steps, make sure you do it right..if it doesn't work come back for more!
But as said. First did the jeep start before this? Are all grounds checked, cleaned and tightened?
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Unread 02-13-2012, 02:14 PM   #11
Mdeez415
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Could it be cps ( crankshaft position sensor )?
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Unread 02-13-2012, 03:22 PM   #12
Azzy
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Originally Posted by Mdeez415 View Post
Could it be cps ( crankshaft position sensor )?
It is possible, they get all weird when going. When mine acted up, it would start on starting fluid, but never by itself, when all else checked out good.
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Unread 02-13-2012, 03:45 PM   #13
Mdeez415
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I think mine is goin at the moment. It's my daily driver. Sometimes it starts great , sometimes it just cranks with no fire. Is it hard to change and how am I sure this is the problem before buying hella new parts?
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