I have looked around a few times now and haven't found a thread on this but if there is one please point me to it. I have a 2002 TJ Sport with 4.0L engine and automatic transmission.
I went out to start my Jeep this morning as usual. It was cold (15 degrees) so I pumped the gas pedal 3 times before turning the key. Normally it takes a few seconds of it just cranking before it fires up and runs. If I turn the key back and try again it starts up right away usually or if I leave it turned it starts after a few seconds. However if I turn the key back at the same time it is going to start up the engine dies and when I try to start it again it only cranks and doesn't start. This is the 3rd time this has happened to me.
The first I checked the spark plugs and cleaned them a little even though they were pretty clean and it started after that.
The 2nd time I tried replacing the ignition coils after getting a bad reading from them but the new ones gave the same reading (I forget exactly what the reading was but I got it from the Hayne's Jeep Manual). It started up with the new coils but I put the old ones back in to test them and it also started with those (i ended up putting the new ones back in after that). It happened again and I am stumped as to what it can be.
I have tested my fuel pressure and that is fine and made sure my choke is working. Like I said this only happens when it is both cold and I turn the key back when it is about to start. I know that if I just leave the key turned it will start but the sound of it cranking and not starting at first still causes me to pull the key back sometimes and try again. If anyone has any suggestions as to what could be causing this I would greatly appreciate them.
I went out to start my Jeep this morning as usual. It was cold (15 degrees) so I pumped the gas pedal 3 times before turning the key. Normally it takes a few seconds of it just cranking before it fires up and runs. If I turn the key back and try again it starts up right away usually or if I leave it turned it starts after a few seconds. However if I turn the key back at the same time it is going to start up the engine dies and when I try to start it again it only cranks and doesn't start. This is the 3rd time this has happened to me.
The first I checked the spark plugs and cleaned them a little even though they were pretty clean and it started after that.
The 2nd time I tried replacing the ignition coils after getting a bad reading from them but the new ones gave the same reading (I forget exactly what the reading was but I got it from the Hayne's Jeep Manual). It started up with the new coils but I put the old ones back in to test them and it also started with those (i ended up putting the new ones back in after that). It happened again and I am stumped as to what it can be.
I have tested my fuel pressure and that is fine and made sure my choke is working. Like I said this only happens when it is both cold and I turn the key back when it is about to start. I know that if I just leave the key turned it will start but the sound of it cranking and not starting at first still causes me to pull the key back sometimes and try again. If anyone has any suggestions as to what could be causing this I would greatly appreciate them.