ECU question 88 Cherokee XJ
CF Veteran
Joined: Jun 2011
Posts: 2,858
Likes: 1
From: Nor-Cal
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
CF Veteran
Joined: Jun 2011
Posts: 2,858
Likes: 1
From: Nor-Cal
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
I appreciate the tips, but I am totally shocked by them.
Literally, both times I have disconnected the battery to work on the Jeep, and then reconnected everything the car ran awful. Super rough idle, misfires, loss of power etc. However, after 24 hours or so, Molly begins to run normally without any issues. Full power, no misfires, good idle etc.
Keep in mind, I am not storing the Jeep during these sessions. They tend to be about 2 to 5 hour ordeals, and not multiple day events.
Confused. The jeep is still fun though.
Literally, both times I have disconnected the battery to work on the Jeep, and then reconnected everything the car ran awful. Super rough idle, misfires, loss of power etc. However, after 24 hours or so, Molly begins to run normally without any issues. Full power, no misfires, good idle etc.
Keep in mind, I am not storing the Jeep during these sessions. They tend to be about 2 to 5 hour ordeals, and not multiple day events.
Confused. The jeep is still fun though.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Absolutely positively...... 97.8% a thing that would cause this is a shaky connection somewhere. I bet you have a loose connection or just a bad connection that is being moved a little when you disconnect and reconnect. After years of wear and heat wires sorta harden in shape. This could cause a bad connection to settle back in after some vibration ie running and driving...
CF Veteran
Joined: Jun 2011
Posts: 2,858
Likes: 1
From: Nor-Cal
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
I've been working and stuff.... Just haven't done much to the jeep or had much motivation all winter. I'm getting back into it though. Don is so shocked to see me he doesn't even.know what to say hahaha. Should say renix moderator instead of regional moderator btw. You should change that.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I've been working and stuff.... Just haven't done much to the jeep or had much motivation all winter. I'm getting back into it though. Don is so shocked to see me he doesn't even.know what to say hahaha. Should say renix moderator instead of regional moderator btw. You should change that.
Here's something I've been working on:
https://www.cherokeeforum.com/f51/cr...x-tips-153657/
CF Veteran
Joined: Jun 2011
Posts: 2,858
Likes: 1
From: Nor-Cal
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
What was that? High.... Oh stock.... Now why would you do that!.... That just proves that you are a man who truly understands the workings of an engine. If you post a build thread you will probably get 50 people telling you you should have used a high volume pump..... People who just don't understand how engine oiling systems work. I am so happy you posted the correct answer. I knew you would.
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
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