97 2.5L No Start

[jmira29]

Hey all, I am having a problem getting my 1997 Wrangler 2.5L to start. The thing started and ran fine on Saturday, went to start it Sunday and nothing.

I hear the fuel pump coming on and there is fuel. However, there is no spark. I checked the coil, it had 2 small cracks, so I replaced it. That didn't do the trick. I looked at the ignition stator/module, it didn't appear in the best condition, so I replaced that, still no luck.

Lastly, I figured it had to be the Crank Position Sensor, so I replaced that. There is still no spark! I tested the plug for the ignition module, that test turned out fine (proper voltage).

I am stumped as to where to go next. I cleaned the positive and negative cables from the battery. I cleaned a couple grounds and cleaned the cable at the PDC. I can't figure it out. Any help would be MUCH appreciated!! Thanks!!

[fredjacksonsan]

Have you looked at your cap and rotor? A cracked cap might cause the issue.

Funny that it was ok Sat and not on Sun...any water involved, either crossing or humidity?

[jmira29]

I checked the cap and rotor - both are fine/in-tact. Humidity is a possibility as it has been very humid in our area lately. I still can't get it going though.

[fredjacksonsan]

Did you get gas on Saturday? It could be water in the gas....if you filled up, try some Drigas or HEET or something similar. And avoid that gas station.

[jmira29]

Nope, didn't get gas recently. It is the wierdest thing ever. I just can't figure out why there is no spark. Like I said, I've done numerous checks with no luck. Just don't know why the coil won't spark.

[gtmud]

Are you getting a signal from your crank or cam sensors. Your crank sensor can be read with an ohm meter ( digital), and ohm out your stator, looks can be deceiving. you should have a constant power to your coil, and a ground signal should come from your stator. Check all your wires, ohm them out, anything higher than 5 ohms ( disconnected) should be repaired.

[gtmud]

If you have a good meter(digital) You could check for a signal being generated at the crank sensor. Disconnect the harness, attach your meter an set it on te lowest Voltage possible, I think its an dc signal. You should see about .5 volt or so when you crank the engine. Also you should have a referance voltage on one of the wires to the crank sensor that is usually 5 volts.