Hi there,I'm trying to work out whats wrong with my daughter's 10 month 97 model 4 litre 4x4 cherokee sports. I recently replaced the crank shaft sensor as all signs pointed to it being faulty,as in start and run one minute and then not starting the next time or completely stopping while driving.Wasn't the problem and then i found that a terminal for the ASD relay had fallen down In the PCM housing so i pushed it back into place until it locked and was working fine,but i still have no power at coil or injectors.I am about to check the voltage from the crank and cam shaft sensors to rule them out as the problem but i had a spare cam shaft sensor and it made no difference,Still no power.I found out that i had to reset the PCM and did that but made no difference.Do i have to reset or relearn the computer or is that the problem.The ASD relay clicks on and i have power but then straight off but but this is suppose to be normal by my research,First turning on to power the line and then off then awaiting a message from the computer,Is that right or not? Or is the relay Faulty.Any isight would be great as she's about to sell it as she needs a car for work and family and cannot afford the hourly rates of the auto electicians being that she is on single mum

 

Aftermarket Crank position sensors have been hit or miss for users on this forum. Is the one you installed OEM?

 

I Don't know to tell you the truth but my daughter bought it from a jeep dealer but thanks and I will check

 

If from the Jeep Dealer it would be Mopar so not likely to be that though I guess a small percent of them may be bad. Did it start at all after installing it?

 

You might try this to test the Crank sensor.

http://troubleshootmyvehicle.com/jee...crank-sensor-1

 

No it did not start after installing the crank shaft sensor but as I said I found that the Auto shut off relay in the power control module pushed down in the housing and not making contact but I fixed that to