Last post on Mar 12, 2013 at 1:19 PM
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#660 of 1886 No Spark to my jeep? 97 wrangler
Jul 20, 2006 (2:48 pm)
I have a 1997 Jeep wrangler 2.5, I took it off roading and on this trip the jeep rpm's fluctuated sparatically and then the jeep shut off, it sounds like it will turn over and on but there is no spark going to the ignition coil or wires. the starter, alternator, battery, and computer have all been tested and verified in correct working order. for a few times i was blowing the ASD fuse but that has ceased. I still have no spark to ignition coil, but at the turn of the key i have gauge indicators and all. Anyone have any ideas what to check or test next, im stuck. I'm thinking i may have a ground or somehow a slit wiring harness... any suggestions?
#662 of 1886 88 jeep 2.5 l no spark
Aug 02, 2006 (1:09 am)
my 88 jeep was sunk up above the fenders in mud and water it shut off in the pit and had to be pulled out i changed the coil ignition module rotor distributor cap plugs and wires. i checked all fuses and relays but still no spark help please
#663 of 1886 Re: 88 jeep 2.5 l no spark [88jeep]
Oct 17, 2006 (11:28 am)
You guys still having problems? Check the distributor cap for moisture or damage. Spray some WD40 in there to get rid of any water.
#664 of 1886 1997 Wrangler losing power and missing
Oct 17, 2006 (7:35 pm)
I have a 1997 Wrangler SE. 4 cyl. Driving around town, I don't notice any problems. If I drive 100-150 miles in one direction at one time, the Jeep starts losing power, then it begins "missing" or acting as if it isn't getting fuel. I doesn't quit, it just "misses." I took it to a shop back in June, they ran a diagnostic and said it was the MAPS sensor. I also changed the cap, rotor, plugs, and wires and it ran great until earlier this week. It jsut started after about 150 miles into a trip from Boise, Idaho to Salt Lake City, Utah. The diagnostic shows nothing. Anyone have any ideas? Thanks.
#665 of 1886 Re: 1997 Wrangler losing power and missing [1utahman]
Oct 17, 2006 (10:26 pm)
Would that be before I-84 meets I-15? Some parts of that route may take you over 6,000 feet in elevation. Could the reduced air pressure there affect manifold pressure?
#666 of 1886 Re: 1997 Wrangler losing power and missing [tidester]
Oct 18, 2006 (7:22 am)
That is exactly where the trouble began. Just about 20 miles before Snowville, Utah. Then it continued sporadically until I got home. I suppose the change in elevation could be affecting manifold pressure. It could mean the MAP sensor installed back in June was faulty. Any other thoughts? I'm headed to Autozone this afternoon to see if they can pull any codes. Thanks.
#667 of 1886 Re: 1997 Wrangler losing power and missing [1utahman]
Oct 18, 2006 (11:00 am)
That's all I can think of off the top. Any other Wrangler owners experience those symptoms?
#668 of 1886 Re: 1997 Wrangler losing power and missing [tidester]
Oct 18, 2006 (5:39 pm)
Autozone is unable to run a diagnostic unless the check engine light is on. So I took the opportunity to stop in at Terraflex (formerly MEPCO, all Jeep, all the time...) in Salt Lake and I had a chat with the head service tech. He 99% certain that because nothing is activating the check engine light, I have an injector going bad. Once I run for a while, it heats up and aggravates the bad injector. He says he'd put money on a bad injector causing the occasional single cylinder misfire. This weekend we'll run a diagnostic history to find the misfiring cylinder, replace the injector, and according to Terraflex, I'll be out the door for just over 2 bills. I'll post the rseults for future reference. Thanks.
#669 of 1886 Re: 1997 Wrangler losing power and missing [1utahman]
Oct 18, 2006 (7:33 pm)
I'll post the rseults for future reference.
We're looking forward to your report!