85 CJ7 258 idles then dies w/ video posted

[Torxhead]

There is a solenoid on the carb that controls idle speed. As I recall it would be controlled by the computer thru vac and electrical.

 

[mtnwhlr]

May be time to do the Nutter By pass and take the computer out of it all together. Or if you don't want to do that I have two of them that I'm not useing because I did the bypass.

 

[Torxhead]

May be time to do the Nutter By pass and take the computer out of it all together. Or if you don't want to do that I have two of them that I'm not useing because I did the bypass.

That could possibly be the problem. If the by pass is done, then I would think the idle speed should be reset. As I recall that solenoid is called a sole-vac.

 

[moranda]

Well the sol-vac has not been on the jeep since I have first had it running. I am fine with nuttering the jeep and throwing out the ECU. The jeep does have to pass a tail pipe sniffer test for me to get my registration for it though. I have no idea what the computer was doing earlier but it did pass the tail pipe sniffer the first time I took the jeep to get my tags. Can an auto parts store test an ECU to see if its bad? Even though the jeep wont stay running its not a bad idea to go ahead and nutter it?

 

[moranda]

Also i found this black wire loose it is close around the starter solenoid not sure what it goes to though.

 

[Neuner]

Can an auto parts store test an ECU to see if its bad?

ECU or ICM? I had a problem of mine not running longer than 20 minutes when I first got it. Took the ICM in to have it tested and it registered fine. I went ahead and replaced it anyways and it fixed the problem. I just really don't trust the tests they put any of them through. Same for batteries.

 

[Torxhead]

That black wire might be for the neutral safety switch connection, but can't verify that right now. Doing the John Nutter By-Pass should determine weather the computer is the problem. I think you should hang on to whatever emissions parts you remove just in case.

 

[moranda]

That would make sense since I have accidentally tried to start my jeep with the clutch out and in gear.

 

[mtnwhlr]

When I did the Nutter Bypass I went to the parts store and got the plastic wire cover that looks stock and put the wires in it to give it the factory look because I have to do a Emmision test also and they didn't have a clue.

 

[Lumpy Grits]

That would make sense since I have accidentally tried to start my jeep with the clutch out and in gear.

No CJ ever had a clutch interlock as OEM(thank God!)
LG

 

[moranda]

If in the future I decided to go with a mpfi system would a nutter bypass effect this or cause a problem?

 

[Torxhead]

The multi port fuel injection system kit comes with its own very effective and computer controlled ignition system. The Howell throttle body system on my '86 AMC 258 i6 / 4.2l allows me to use a Nutter by-pass to eliminate the computer controlled ignition and use the Team Rush large cap setup with the oem style remanufactured Motorcraft distributor.

 

[moranda]

Alright so I nuttered it today and that did the trick. It ran and i drove it around for awhile today. Thanks for all the help and i am sure i will need more in the future.

 

[mtnwhlr]

I'm glad to hear you got it fixed

 

[Torxhead]

So it sounds like a bad computer. From what I hear, the by-pass will affect carb fuel mixture control by the computer also. So now you have a bunch of useless emissions control stuff that doesn't do anything.

 

[moranda]

Well also i assumed i had a bunch of useless emissions stuff on there because most of the vacuum lines were gone.