Jump to content

91 Comanche starting problems


Recommended Posts

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

  • 3 weeks later...

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

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

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...