Jeep won't start

[ladean2185]

So I had a rattle that was driving me crazy in the passenger side front of my jeep. I found the problem and it was a bolt under the battery tray that had fallen out so I got that fixed and also removed the po's speaker and amp wire since I would never need it. I went back out to go to my parents house and the jeep would crank but never started. I hear the fuel pump kick in so I know it's not that. I did take the coil wire off and tried sparking it when someone else was cranking but it's not firing. My question is does the ignition coil go bad that fast or should I check something else. Sorry for the long post but I was just trying to put everything I done out there

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[ac_]

Retrace your steps of what you changed. Unless hell froze over I doubt your coil is the issue. When you removed the amp did you remove extra wires that may have once been connected to an alarm? Also did you miss a wire like one that goes to your fuse box when you removed your battery. Check your grounds.

Go back over what you changed. It worked you changed something it doesn't work now. That would be my first move.

 

[ladean2185]

I've checked and rechecked everything I can think of. Checked the little battery sensor even. Is there anywhere I can put a test light to check for power or anything like that I can do

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[ac_]

I've checked and rechecked everything I can think of. Checked the little battery sensor even. Is there anywhere I can put a test light to check for power or anything like that I can do

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Check all of your fuses. You can check those without pulling them with a test light. there are some behind your glove box and some under the hood, Make sure they are all good. There are also fusible links in the fuse box make sure none of those are smoked.

They other day out of the blue my rotor in my distributor broke with no warning make sure your cap and rotor are good.

 

[TJ2]

I hear the fuel pump kick in so I know it's not that.

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Put some gas my man!
Seriously, maybe it's a relay.

 

[ladean2185]

Put some gas my man!
Seriously, maybe it's a relay.

Already tried that also

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[T Crawford]

check the Crank Position Sensor wire-- un plug and replug it- I've seen that a lot of no-start issues.

 

[ladean2185]

check the Crank Position Sensor wire-- un plug and replug it- I've seen that a lot of no-start issues.

I'll try that when I get home from work this evening

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[ladean2185]

check the Crank Position Sensor wire-- un plug and replug it- I've seen that a lot of no-start issues.

I know this is a stupid question but where is it at.

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[TJ2]

I know this is a stupid question but where is it at.

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That CPS is under near the firewall by the bell housing closed to the floor.

 

[ladean2185]

I've been driving myself crazy trying to figure out what happened, all my gauges work normal I read that if it's the pcm they won't function right. I'm hoping it's not raining tomorrow when I get home from work so I can check it out more. I also read that if it's the crank position sensor the fuel pump won't kick in, is this true

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[mrblaine]

I've been driving myself crazy trying to figure out what happened, all my gauges work normal I read that if it's the pcm they won't function right. I'm hoping it's not raining tomorrow when I get home from work so I can check it out more. I also read that if it's the crank position sensor the fuel pump won't kick in, is this true

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Nope, the voltage is still going to the CPS with the key on, it just isn't reading the notches in the flywheel and sending the signal back to fire the coil correctly. Has nothing to do with the fuel pump or fuel system.

 

[ohiopatriot]

I also read that if it's the crank position sensor the fuel pump won't kick in, is this true

No. The pump runs for a few seconds if you just turn the key on and don't even crank it.

all my gauges work normal I read that if it's the pcm they won't function right.

Very unlikely. Oil pressure, fuel level etc have their own circuit.

My question is does the ignition coil go bad that fast

Yes it can.

or should I check something else.

Yes. Check for injector pulse. 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.

 

[ladean2185]

Bought the ignition coil and crank position sensor today, replaced the coil and no change replacing the sensor in the morning

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[ac_]

Bought the ignition coil and crank position sensor today, replaced the coil and no change replacing the sensor in the morning

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Sorry to hear, In all of my years of wrenching I have yet to see a coil fail. Other than an old HEI Chevy coil, I have seen those go bad.

I hope your crank sensor fixes the issue.

 

[Squatch]

Sorry to hear, In all of my years of wrenching I have yet to see a coil fail. Other than an old HEI Chevy coil, I have seen those go bad.

I hope your crank sensor fixes the issue.

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...

 

[ac_]

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 long shot, but just thought I'd mention it...

I have seen a ton replaced, but yet to have seen one fix the issue. Other than like I said those old abused HEI coils that sit in the distro cap.

 

[Squatch]

I have seen a ton replaced, but yet to have seen one fix the issue. Other than like I said those old abused HEI coils that sit in the distro cap.

There's actually a series of pics online from my old Cascade Ramblers days that capture me replacing a coil on an American convertible for a gal. The car just died while driving. No one could figure it out. I pulled a coil from another club member's car and installed it in hers. Fired right up. We made a run to NAPA for a new coil, and had her back on the road in no time.

 

[ac_]

There's actually a series of pics online from my old Cascade Ramblers days that capture me replacing a coil on an American convertible for a gal. The car just died while driving. No one could figure it out. I pulled a coil from another club member's car and installed it in hers. Fired right up. We made a run to NAPA for a new coil, and had her back on the road in no time.

Nice you old junk yard dog! I bet they go bad, but since I have never seen it; it wouldn't be where I started to look. Plus I would check for power going to it, and ground coming from it before I replaced it. Sometimes if I am fixing a friends car, I make them hold the coil wire while I crank it. I am a mean old dawg! What? If the coil is bad, they wont get shocked!

 

[Squatch]

Nice you old junk yard dog! I bet they go bad, but since I have never seen it; it wouldn't be where I started to look. Plus I would check for power going to it, and ground coming from it before I replaced it. Sometimes if I am fixing a friends car, I make them hold the coil wire while I crank it. I am a mean old dawg! What? If the coil is bad, they wont get shocked!

LOL When I installed the new coil in her American, I purposely left the hot wire off so that when she cranked it, it wouldn't fire. The panicked look on her face was priceless. Me 'n the guys just howled. Good times!