heavyequipment
NAXJA Forum User
- Location
- Near Tucson, AZ
My grandson now has my '89 Cherokee with Renix control system. He called me and said it would crank but not start. I told him to unplug the CPS and replug it. It started and ran fine. Since this had happened to me before, I got to thinking how to prevent this problem. My idea: connect one CPS wire through a relay that is only on when the ignition is on. I used CPS plugs from a parts Jeep and connected them to a relay like the stock ones Jeep and Volvo use. The wire that isn't controlled by the relay is just spliced together to always stay connected. The relay's magnet coil is connected to ground on one side and to the fuel pump resistor on the other. I connected it to my '90 Cherokee and it worked as expected. I took it back out and my grandson installed it in the '89. He had been driving it with no problem since the one time it wouldn't start, so the fact it is still running OK doesn't prove anything. If it NEVER gives trouble again I'll claim victory over an exasperating problem. The cost is very low, so it's worth a try if you think it might help you...