Hoooper
NAXJA Forum User
- Location
- Hayward, CA
I have a 94 ZJ with a junkyard 4.0L engine of unknown history. The engine has an intermittent hard starting issue, always cranks fine but when starting it will do one of a couple things: 1) start right away 2) crank for a couple seconds and start 3) crank for a while, cycle key and try again it starts right away 4) crank, cycle key, crank, cycle key, start.
Engine runs fine when its running although it can be a bit wonky at times. The issue does not relate to being warmed up or not, it happens from cold, happens after a quick stop, happens when its 20F out and happens when its 100F out. I suspect a questionable crankshaft position sensor, maybe a questionable connection or failing sensor. Thoughts? Im probably mostly just looking for confirmation that the CPS would be a likely cause.
Engine runs fine when its running although it can be a bit wonky at times. The issue does not relate to being warmed up or not, it happens from cold, happens after a quick stop, happens when its 20F out and happens when its 100F out. I suspect a questionable crankshaft position sensor, maybe a questionable connection or failing sensor. Thoughts? Im probably mostly just looking for confirmation that the CPS would be a likely cause.