amc 360 shutting down - JeepForum.com
 
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post #1 of 6 Old 09-17-2011, 07:36 AM Thread Starter
wallydorf
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1979 CJ5 
 
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Location: desert hot springs
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amc 360 shutting down

I have an AMC 360 that I installed a TBI system on it. Since the day I did I have a constant shutting down of the fuel pump circuit. It is a GM kit and the company I purchased it from Has been very supportive but they just keep sending me new parts that dont solve the issue. Currently on my 3rd ECM and second fuel pump. I know it has got to be a wiring problem and I have gone over the wiring install a hundred times and It is all per the instructions. No it isnt a ground problem because I have changed all the grounds from frame to body to engine etc. Anybody out there know these systems? could really use some help

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post #2 of 6 Old 09-17-2011, 07:46 AM
Stumpbumper
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So the ECM is shutting off the circuit to the pump? Have you put a meter on it to confirm this?
I myself would run the fuel pump circuit to a seperate and different power source that is switched by the key! See what that does.
Were is the fuel pump located? if its under the hood then it could be vapor locking! It needs to be on the frame or in the tank.

1984 CJ7, 258..HEI..MC2100, T176/D300, D30/M20 lockers, lift, warn winch!

"When in doubt! Gas it out!"
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post #3 of 6 Old 09-17-2011, 08:30 AM
Jon In Tucson
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Wally,
Does your fuel pump circuit route through an oil pressure switch? Could this be the problem? Another thought is to log data into your laptop from your ALDL connector. This will tell you what is exactly happening when the fuel pump drops out. If you were savvy enough to install the system, the you'll find this gremlin. God bless.
Jon In Tucson

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post #4 of 6 Old 09-19-2011, 08:23 AM Thread Starter
wallydorf
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you guys are both awesome. Rerouted the fuel pump through the key and now at least the fuel pump stays on when it shuts down. The oil pressure is a manual so there is now wire there but a great idea. Spent the weekend with my meter and seem to have traced it to somewhere in the main loom that has to do with the coil. drove it to work this morning and it ran great but it shutdown when I pulled up to the gate. thank you both for your help I will endure and conquer but I really hate electrical.....LOL
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post #5 of 6 Old 09-19-2011, 08:53 AM
Stumpbumper
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Sometimes we can chase ghosts. When a "load" is put on a "circuit", you build heat called amps. This can actually open up a connector and cause the connection to go away. Fork terminals and the crimp on splices are bad for this. solder splices and crimp butt splices are best.
I would eliminate those in the process if you have any!

1984 CJ7, 258..HEI..MC2100, T176/D300, D30/M20 lockers, lift, warn winch!

"When in doubt! Gas it out!"
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post #6 of 6 Old 09-19-2011, 04:48 PM
LakBum_1
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When did the jeep start back up? Coil would be a cool down. how did it run before the throtle body? The brain on a CJ is very simple, agree with the coil possiblity after that it's the TBI..
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