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Kejtar
October 10th, 2006, 19:16
OK, the original problem on my dad's jeep was solved with a new fuel filter.... but now it's a new problem: got fuel pressure but NO spark! Got a new coil in it and this problem didn't start till the fuel pressure came back. So...... in a 94 manual tranny jeep what controls the spark? It shouldn't be a CPS problem as that causes a crank/no crank and it definately cranks.
87manche
October 10th, 2006, 19:20
CPS will crank and not spark. Take my word for that.
My money is CPS.
Take an ohm meter to it and see if it's shorted out. IIRC it should be around 500 ohms.
Kejtar
October 10th, 2006, 19:26
CPS will crank and not spark. Take my word for that.
My money is CPS.
Take an ohm meter to it and see if it's shorted out. IIRC it should be around 500 ohms.
OK, gonna do that tomorrow.... any other ideas?
87manche
October 10th, 2006, 20:19
I'd unplug and replug the CPS to see if you can't coax another start out of it.
check the TPS too, if it's shorted or something it can do weird things to the ECU.
Kejtar
October 10th, 2006, 21:06
I'd unplug and replug the CPS to see if you can't coax another start out of it.
check the TPS too, if it's shorted or something it can do weird things to the ECU.
OH I did try that (just to be on the safe side). I also unplugged the battery for a while as well just to make sure that no sensors or nothing got hung upon as well.
GSequoia
October 10th, 2006, 21:12
I have never seen a CPS stop a vehicle from cranking!

You've got a spare CPS (right?!), toss it in. Also in my experaince coils just about never fail...
Kejtar
October 10th, 2006, 21:18
I have never seen a CPS stop a vehicle from cranking!
Unplug it... and it's going to go click click.


You've got a spare CPS (right?!), toss it in. Also in my experaince coils just about never fail...
Well.... different plug.