Well, my always reliable TJ died while driving down the road today. I have a 4.0L, 5-speed and was driving down the road few minutes from home when the seems to momentarily die and the continue to run fine. It did it again and I noticed the gauges jumped up and down. I turned around to head home, it did it again and then stalled completely, would not restart...happened to have code reader in the Jeep, NO trouble codes showing.
So....working backwards on what I have done after I towed it home.
Fuel Pressure - turned on the key and verified there was fuel present at the fuel rail.
Recently I replaced the spark plugs with Champion Platinum plugs and a new Delphi coil rail. I removed the new coil rail and put the old one back on...still won’t fire.
Assuming fuel pressure is adequate, next I plan to crank it over, then pull coil rail and plugs to check if they are wet with fuel, injectors are original with 215,000 miles on them, just find it hard to believe all 6 plug up at same time.
Not sure how to check for spark with the coil rail. I don’t understand why no trouble codes, assuming it’s an electrical type problem!
So....working backwards on what I have done after I towed it home.
Fuel Pressure - turned on the key and verified there was fuel present at the fuel rail.
Recently I replaced the spark plugs with Champion Platinum plugs and a new Delphi coil rail. I removed the new coil rail and put the old one back on...still won’t fire.
Assuming fuel pressure is adequate, next I plan to crank it over, then pull coil rail and plugs to check if they are wet with fuel, injectors are original with 215,000 miles on them, just find it hard to believe all 6 plug up at same time.
Not sure how to check for spark with the coil rail. I don’t understand why no trouble codes, assuming it’s an electrical type problem!