Comanche777 Posted September 20, 2011 Share Posted September 20, 2011 Help I have a 91 Comanche Eliminator that has been having various starting problems. Sometimes, cold it will crank and not start until you turn the key off then on for a bit, but starts fine warm. Other times it will start fine cold but require the key off and on ritual to start warm. Last night I went to the store, did the cold start routine, drove to the store and when I came out I turned the key and nothing. Had to push start it to get home. Checked the battery, got 12.9v. Disconnected the negative terminal for a bit and when I hooked it back up the truck started right up. All I can think of is the ECM. I was eying the fuel pump or the fuel pressure regulator but after last night, I am thinking the computer is going out. Any ideas? Thank you Link to comment Share on other sites More sharing options...
Comanche777 Posted October 6, 2011 Author Share Posted October 6, 2011 Incase anyone is interested, I replaced the computer and it fixed everything. Starts and runs like a new truck. BTW, if you ever have to do this, DO NOT go by what the AP store says you need. I found that the OEM number on my computer was what the store called out for an automatic trans not my AX15. Link to comment Share on other sites More sharing options...
HOrnbrod Posted October 6, 2011 Share Posted October 6, 2011 Incase anyone is interested, I replaced the computer and it fixed everything. Starts and runs like a new truck. BTW, if you ever have to do this, DO NOT go by what the AP store says you need. I found that the OEM number on my computer was what the store called out for an automatic trans not my AX15. Sometimes the pins in the 64-pin ECU connector get corroded and/or recessed. Especially on the 91s. Before replacing the ECU, disconnect and inspect for recessed pins, and douche the connector's pins down with a good electrical contact cleaner. I do this about once a year and it seems to help each time. BTW, how much did the new ECU set you back? :eek: Link to comment Share on other sites More sharing options...
Comanche777 Posted October 7, 2011 Author Share Posted October 7, 2011 Autozone $156 Link to comment Share on other sites More sharing options...
Comanche777 Posted October 7, 2011 Author Share Posted October 7, 2011 Good point on the connector, I checked mine and they looked ok, the factory used some dielectric grease on the connector so I didn't see any corrosion Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now