Hey folks, I have had a couple of intermittent problems with an old Cherokee I have. One is the no crank deal that mostly turns out to be the neutral safety switch. I can usually get it to start by leaving the ignition switch in the on position, and manually closing the starter relay. The diagrams show voltage coming straight from the ignition switch to the hot side of the starter relay coil. When it won't crank over, there is no voltage there. Like I said, I can get it to start by manually closing the starter relay, so that really ain't a big deal to me right now. I have replaced the electrical part of the ignition switch, but that didn't help. But if anybody has any ideas, I'm listening.
Second problem I have that rears it's ugly head from time to time. After running for a while, the engine will just stop. Try cranking it, and it will turn over but will not start. After cooling down a bit, it will crank and start. I got it to replicate tonight, and I had no spark. I did seem to have 5.something volts coming from the computer to the Crank Position Sensor. The diagram I have seen says 8 volts. I tried to measure the resistance on the CPS, but wasn't getting anything consistent, but it was dark out, and I'm not sure I was reading in the right place. All that said, does it sound like the CPS is going/gone bad? It doesn't look like it would be that big of a deal to change, but I don't wanna be a parts changer. Does anybody know of a test I can do before I buy a new one, or is the no spark a sure sign? Anyway, thanks an awful lot for reading
Second problem I have that rears it's ugly head from time to time. After running for a while, the engine will just stop. Try cranking it, and it will turn over but will not start. After cooling down a bit, it will crank and start. I got it to replicate tonight, and I had no spark. I did seem to have 5.something volts coming from the computer to the Crank Position Sensor. The diagram I have seen says 8 volts. I tried to measure the resistance on the CPS, but wasn't getting anything consistent, but it was dark out, and I'm not sure I was reading in the right place. All that said, does it sound like the CPS is going/gone bad? It doesn't look like it would be that big of a deal to change, but I don't wanna be a parts changer. Does anybody know of a test I can do before I buy a new one, or is the no spark a sure sign? Anyway, thanks an awful lot for reading
