Jeep won't start

[ladean2185]

I, on the other hand, have had at least a half a dozen coils fail on me. No kidding. But it sounds like he has already eliminated that as the culprit, so it's a non-issue. I've had ignition switches fail to where there's power to the distributer when in the "On" position (spark at the points, which tells you the vintage of said vehicles), but once you start cranking, there is no power getting to the dizzy. I've forgotten what the actual reason was, but I replaced the ignition switches in both cars, and the issue was resolved. Seems like a longshot, but just thought I'd mention it...

I'm getting ready to go change the sensor now, I talked to the guy at my local parts store and he just went through the same thing with his Dakota. Turned out to be the distributor pickup assembly so I had him get one of those on hand for me also. If that stuff isn't the problem I'll try the ignition switch.

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[Squatch]

I'm getting ready to go change the sensor now, I talked to the guy at my local parts store and he just went through the same thing with his Dakota. Turned out to be the distributor pickup assembly so I had him get one of those on hand for me also. If that stuff isn't the problem I'll try the ignition switch.

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See if there is a test you can do regarding the ignition switch. There's got to be something online regarding doing so. I'd hate to see you throwing your money at something that's such an obscure possibility. Wish I could say I remember how it was that I discovered that's what my problem was, but I just can't recall.

 

[ohiopatriot]

I'm getting ready to go change the sensor now, I talked to the guy at my local parts store and he just went through the same thing with his Dakota. Turned out to be the distributor pickup assembly so I had him get one of those on hand for me also. If that stuff isn't the problem I'll try the ignition switch.

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Buy or borrow a noid light and test for pulse at injector.

If you have just no spark, could be bad coil,etc

If you have no spark and no pulse could be crank sensor,etc.

More clues help us help you.

Or.... throw parts at it, guaranteed the last part you install will fix it.

 

[ladean2185]

Or.... throw parts at it, guaranteed the last part you install will fix it.

I've actually got a guy coming in a little while to check it. I already talked to the parts store and they said I can return the parts if I don't need them. I figured a new coil wouldn't hurt anyways since the one I took off was factory

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[ladean2185]

Or.... throw parts at it, guaranteed the last part you install will fix it.

The guy hooked his snap on reader up, no codes and had crank position sensor is good. I replaced the pickup assembly in the distributor with still no change.

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[Squatch]

The guy hooked his snap on reader up, no codes and had crank position sensor is good. I replaced the pickup assembly in the distributor with still no change.

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:icon_popcorn: Please continue. You have a captive audience... :icon_popcorn:

 

[ladean2185]

:icon_popcorn: Please continue. You have a captive audience... :icon_popcorn:

Well he checked everything, the computer is bad. So my new one and metal cloak front fenders should be here around the same time lol

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[Squatch]

Well he checked everything, the computer is bad. So my new one and metal cloak front fenders should be here around the same time lol

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Wowzer. If you don't mind my asking, how much will the computer set you back?

 

[ladean2185]

Wowzer. If you don't mind my asking, how much will the computer set you back?

$187 programmed to my door

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[ladean2185]

$187 programmed to my door

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The parts that I had already picked up was just about that much. I took the crank position sensor back though

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[Squatch]

$187 programmed to my door

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Well, it's a bargain if it takes care of the problem. Keep us updated!

 

[ladean2185]

Well, it's a bargain if it takes care of the problem. Keep us updated!

I will, should be here by 3-9-18

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[KCsTJ]

I used to get miffed at myself for misdiagnosing and getting a part I didn't need. Now I put the misdiagnosed (dont need yet) part in my new "Tj parts inventory box" cuz I'll need it at some point down the road.
And I won't have to reorder
Not that I have lots of parts in there u know, ... just a Bosch fuel pump and Mopar temp sensor ...ack we'll u get the point

 

[ac_]

I used to get miffed at myself for misdiagnosing and getting a part I didn't need. Now I put the misdiagnosed (dont need yet) part in my new "Tj parts inventory box" cuz I'll need it at some point down the road.
And I won't have to reorder
Not that I have lots of parts in there u know, ... just a Bosch fuel pump and Mopar temp sensor ...ack we'll u get the point

Not only that you have parts to test with. You can shove them in your tool box haha.

I am nervous for the op. Usually when the computer is bad, it throws codes. Not saying that is always true, but for the most part that is true. I would have liked to have seen more testing like. Is there Key-on power at the coil with the key in crank position. I would like to see if there is actual power coming out of the key at crank.

Is there input to the computer from essential sensors? This could be a broken wire to the computer or from the computer. Is the computer actually getting battery power?. Is every every fuse and fusible link good? (there are also fuses behind the glove box) The fact that it has no spark, and no codes makes me believe it is a little more basic than the computer unless I am missing something.

Are there any tiny red lights on the dash anywhere like an old rogue alarm?

I think I missed what year this is, but doesn't the newer ones have a key sensor? Like a master key?

I don't know. I think I would check crank, and key-on power at the coil, and if it isn't there put some there, and see if you can get it to limp. Usually a bad computer will let you run but not in closed loop.

I am intrigued at best! keep us posted.

Also since I have a factory service manual I didn't need to download one, but maybe someone here can link to the factory service manual. I know we have a list of them here for each of the TJ's. It might help you with diagnosing your issues.

 

[Squatch]

I, too, just save the new "not needed at the moment" parts, Been doing it for years, and now have a small toolbox full of assorted parts. One problem, though, is that I've long since forgotten what the hell some of the parts fit! I end-up having to run part numbers to try and find an application that matches with something I've owned. Some are new parts to things I've never owned, but acquired the parts through some means. How about 6 water pumps to some 30's vintage Chevy stove-bolt sixes? You get the idea. I finally learned to mark the boxes, accordingly. :thumbsup:

 

[ohiopatriot]

I see this at the shop all the time.

Them: I got this problem, it won't start, I've replaced this, this, this and that and done that, but still no start.

Shop: That will be $100 for diagnostics.

Them: WHAT? Crooked ass shop, how can you charge a hunnerd just to tell me what's wrong.

Shop: Well, my experience, knowledge,time and tools are worth something. Without that I go your route and throw parts at it until it starts, what has that cost you?

Them: Uh, well I've put $$$.13 in it so far.

Shop: Plus your time? And still doesn't run, huh?

Them: But I've put $$$.13 in it. I can't afford to pay you a hunnerd to diagnose it. :nusenuse:



Diy is great, if you know your limits, sometimes it's cheaper to take it somewhere.

 

[Squatch]

I see this at the shop all the time.

Them: I got this problem, it won't start, I've replaced this, this, this and that and done that, but still no start.

Shop: That will be $100 for diagnostics.

Them: WHAT? Crooked ass shop, how can you charge a hunnerd just to tell me what's wrong.

Shop: Well, my experience, knowledge,time and tools are worth something. Without that I go your route and throw parts at it until it starts, what has that cost you?

Them: Uh, well I've put $$$.13 in it so far.

Shop: Plus your time? And still doesn't run, huh?

Them: But I've put $$$.13 in it. I can't afford to pay you a hunnerd to diagnose it. :nusenuse:



Diy is great, if you know your limits, sometimes it's cheaper to take it somewhere.

Agreed! Knowing "when to say when" is a great tool to have on hand...

 

[KCsTJ]

What he said ^ know thy limits !

 

[Squatch]

What he said ^ know thy limits !

Well put, Shakespeare!

 

[ac_]

I am still trying to learn mine! I never take my shit to the shop except for glass and tires. And I really wish I could do those myself. It is always 6 tries to get it satisfactory. Easier just to do it right the first time myself.