Question about 1998 Jeep Wrangler

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1998 jeep wrangle 2.5l will not start.

1998 jeep wrangle 2.5 it will not start here what i did to it.. replaced ECU, camshaft and crankshaft postion sensor, tune up cap, rotors, plugs. there is not volt to the coil. when it ran the jeep back fired both ends no power top speed 35miles. gave it a tune up ran good then drop on it's face pop out both ends died

also check fuse 21 20 amp in the power distribution box under hoodright side of engine compartment. no power,fuse good

still no volt's to coil is there a relay somewhere on the line that could be shout off what feeds power to the coil?


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  • jcobb_123 Jul 14, 2009

    i check all the sensor they came back good but, there was something else that happen when you hit the side of the jeep the injecter would fire with the key on. the fuel pump would run we started smelling gas. i puled all connecter cleaned fallow the wiring. there was no cuts then i pulled the batter cable- waited then plug it back in the jeep started and it ran, then turn it off back on and it started again poping out both ends then died.

  • jcobb_123 Jul 14, 2009

    i check all the sensor they came back good but, there was something else that happen when you hit the side of the jeep the injecter would fire with the key on. the fuel pump would run we started smelling gas. i puled all connecter cleaned fallow the wiring. there was no cuts then i pulled the batter cable- waited then plug it back in the jeep started and it ran, then turn it off back on and it started again poping out both ends then died.

  • jcobb_123 Jul 14, 2009

    ran a wire from battery. turn over the jeep and it did nothing no pops. also put some gas and still nothing.

    tming chain or electrical?

  • jcobb_123 Jul 15, 2009

    this work and made the jeep run. the bad thing it pop and no peddle but it ran. when it was turning over it kick back to the starter then would start.

  • jcobb_123 Jul 15, 2009

    the poping only started after it die from running. blue smoke throw the carb. plus i put fuel down the carb to get it to run. need to power to the injector.

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  • Master
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Most likely the valve seals that are bad so its throwing the blue smoke.check out.

Posted on Jul 15, 2009

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well i am sorry a mechanic cant figure this out its really sad. ok so your problem is your either one of two things but most likely the first one i list.

1. camshaft postion sensor
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Now that being said it most likely the camshaft sensor the reason i say that is when a crankshaft postion sensor is bad the car has very hard starts and most of the time no start issues. When a camshaft postion sensor is bad the car cuts off whil driving and can be hard to start up again.

So that being said they are both pretty cheap parts i would go ahead and replace them both and i would bet my 5 years as ford mechanic that solves your issue.

The crank postion sensor is located behind the harmonic balancer pully or right beside it here is a picture from autozone.com and description.

The crankshaft position sensor identifies position of the crankshaft to the ignition control module (ICM), engine control module (ECM) or powertrain control module (PCM).
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  • Designed to meet or exceed OE specifications in form, fit and function.
  • Global coverage for import and/or domestic applications.

  • jamiesturm29_6.jpgAnd the camshaft sensor picture and info from autozone.com below.

    The camshaft position sensor identifies position of the camshaft to the ignition control module (ICM), engine control module (ECM) or powertrain control module (PCM).
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  • jamiesturm29_7.jpg
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    PS if this helps please 4 thumbs up it helps me continue to help on here thanks

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