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Old 02-16-2014, 09:21 AM
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2002 TJ wont start no spark

I am new to this form but need some help. i have a 2002 TJ with 115,000 miles. a month ago I am changing the climate control panel and when I unplug the old panel i hear a hissing noise (car not running). My son (his car 16 yr old) starts it and no issue, but we shut it down to finish install and didn't want fumes in garage. We mount everything and he restarts and it dies after 2 seconds of running. We are in the midwest and its been freezing, but we replace all the plugs, wire set, CPS, ignition coil, rotor, cap, and distributor as well as relays and fuses and still no spark. We pulled a plug and with connected to the wire he turns it over and no spark. Had our mechanic look at it and he says possibly Computer, but no guarantee. I get no faults code and it has new battery as well
looking for ideas??

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Old 02-16-2014, 11:32 AM   #2
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I gather it is a four banger if that new and still has distributor

To check for spark the loose plug must both be connected to a plug wire and the body of the plug agonist a good ground otherwise no spark will be there even when everything is working

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Old 02-16-2014, 01:15 PM   #3
Knows a couple things...

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The hissing sound was simply from disconnecting (or damaging) a vacuum line which runs some of the HVAC system.

When you say you replaced the CPS, was that the camshaft position sensor under the distributor cap or the crankshaft position sensor next to the flywheel?
When you have a choice, buy American.
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Old 02-16-2014, 01:37 PM
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It is a 4 cyl. and I replaced the crankshaft position sensor. Also just test for spark at the brand new ignition coil and no go. Figure the ground is a little corroded at the fire wall and will clean that off. Still at a loss but everyone on this forum seems knowledgable and this is our first Jeep.
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