Join Date: Nov 2008
Location: East Longmeadow, MA
99 WJ won't start, tried CPS, PCM, grounds, etc
Did an engine swap this weekend into my 99 WJ 4.7l. Last night we hooked everything up (at least we thought) and it wouldn't start. It was the Crankshaft position sensor wasn't plugged in. Then it started up and ran for a minute or so until we purposefully shut it off. We ran it without any exhaust hooked up. This morning we went to go start it and it wouldn't. The voltmeter reads 9 volts even though the battery is fully charged. The gas gauge reads completely empty even though there's 1/4 tank in it. The key light is on. I tried the ignition trick to get the error code and it didn't work. The starter cranks but it's getting no fuel. We have checked every fuse in the Jeep. Swapped the PCM from the donor vehicle, still had same error. Rechecked some grounds. (Think they're in the right place) and still had the same problem. Tried hooking it up to a different battery, didn't work. Checked the battery connections, ran power directly to the fuse block and fuses. Swapped the relays for the "important" ones in the underhood fuse block.
From what i've read it could be the PCM (unlikely because i tried both). The crankshaft position sensor was what caused it to not work originally and it threw a code, so i'm weary to believe that's what it is. We tried putting jumper cables in different places as grounds. I'm really stuck as to what it could be so any help would be great. It's starting to be really frustrating.
2000 TJ - Build in progress... slow progress
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
1999 WJ 4.7l - needs muffler, rotors, tires, and will be roadworthy