Re: Engine randomly shuts off
[Re: 469runner]
#3068703
08/17/22 12:04 AM
08/17/22 12:04 AM
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Joined: Aug 2003
Posts: 43,292 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,292
Bend,OR USA
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Sounds like a connection is getting hot and going open, commonly refer to as a high joint in electrical trouble shooting. It could be in the ignition switch, the wiring in the steering column or in the instrument wiring harness to the bulkhead connection or in the engine harness under the hood Do you jiggle or touch and move any of the wiring when it quits? If so try doing only one thing only at a time until you can figure out exactly which circuit or wire is causing your troubles Good luck Please let us know what you find
Last edited by Cab_Burge; 08/23/22 12:11 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Engine randomly shuts off
[Re: PhillyRag]
#3068818
08/17/22 10:49 AM
08/17/22 10:49 AM
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Joined: Jan 2003
Posts: 15,498 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,498
Omaha Ne
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had one years ago that would die when one closed the R door, but start right back up. Drove the owner nuts . What I found was one of the female receptacles in the control box connector was not positioned properly when it was molded so the receptacle was too far in and barely touching the male pin. Replaced the harness/ connector and EOP I have also seen ballast resistors go open when they get hot enough and reconnect after cooling. likely not the issue but they are cheap and good to carry a spare. Another was a bad coil wire that the conductor was burnt a good distance into the insulation from arcing on one end. Another yet was an internally broken wire on the pickup lead likely caused from years of flexing with the vacuum advance movement. Fun ones to find and All simple things to check that are sometimes overlooked. Keep us posted
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Re: Engine randomly shuts off
[Re: topside]
#3068859
08/17/22 12:29 PM
08/17/22 12:29 PM
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Joined: Dec 2005
Posts: 11,692 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,692
Fulton County, PA
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Distributor pick up. Box would be second choice.
If the results don't match the theory, change the theory.
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Re: Engine randomly shuts off
[Re: tman]
#3068870
08/17/22 01:28 PM
08/17/22 01:28 PM
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Joined: Oct 2006
Posts: 7,371 Iowa
burdar
Owen's Dad
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Owen's Dad
Joined: Oct 2006
Posts: 7,371
Iowa
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Do you jiggle or touch and move any of the wiring when it quits? Had this happen to me. Car just shut off. It restarted and I got home. When getting out, my foot brushed against the ignition switch connector at the base of the steering column. The engine hiccupped. I grabbed the connector and gave it a jiggle and the car died. It was just sheer luck that I found it that quickly. Check all your connections.
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Re: Engine randomly shuts off
[Re: 469runner]
#3069026
08/17/22 10:48 PM
08/17/22 10:48 PM
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Joined: Jan 2003
Posts: 8,405 Highland, MI.
Sunroofcuda
master
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master
Joined: Jan 2003
Posts: 8,405
Highland, MI.
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A few times lately that I've had my 1970 'Cuda out the engine will just randomly shut off just driving down the highway. No sputtering, just engine off like I cut the ignition. I coast to a stop, look under the hood and see nothing disconnected. I get in and turn the key and the car starts and runs perfectly. This has happened a few times. I hate not being able to trust the car. I have the Mopar Performance electronic ignition, no orange box, I have one of Ehrenberg's black boxes that is sold on ebay. Seems fine, good ground etc... Could this be a faulty coil? Start it up & jiggle the wires that connect to the ballast resistor. I'll bet they will spark & the engine will die. Then it will start right back up. If so, replace the $2.00 ballast resistor. I went through this back in the early 80's with my old '71 Hemi Charger. I went through a long list of other things before I discovered this!
No Man With A Good Car Needs To Be Justified
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Re: Engine randomly shuts off
[Re: 469runner]
#3070651
08/23/22 01:39 AM
08/23/22 01:39 AM
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Joined: Feb 2003
Posts: 2,815 Sobieski Wi
bee1971
master
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master
Joined: Feb 2003
Posts: 2,815
Sobieski Wi
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Looks Beautiful
Thanx for the resolution , I had one of his Chinese Hi Rev 7500 Ignition Module do the same
Also had a ignition coil from OReillys , MasterPro fail when getting hot at idle running an factory 1.2 OHM Ballast
Hit and miss with all this Chinese Junk
Last edited by bee1971; 08/23/22 01:46 AM.
1971 Dodge Charger Superbee 2011 Ram Sport 1500 Quad Cab Deep Water Blue Loaded Siberian Huskies
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Re: Engine randomly shuts off
[Re: 469runner]
#3070904
08/23/22 09:22 PM
08/23/22 09:22 PM
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Joined: Jan 2003
Posts: 8,405 Highland, MI.
Sunroofcuda
master
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master
Joined: Jan 2003
Posts: 8,405
Highland, MI.
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That's a really beautiful looking Cuda!!! Glad you found the issue. Your NOS controller should last a long time too.
No Man With A Good Car Needs To Be Justified
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Re: Engine randomly shuts off
[Re: 469runner]
#3070915
08/23/22 10:04 PM
08/23/22 10:04 PM
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Joined: Jan 2003
Posts: 15,498 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,498
Omaha Ne
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thanks for the follow up. Just cause I'm a type the only way to be a 100% sure the box is bad is to reinstall it and see IF the problem returns. Sorry but my years in R&D required back to back testing (sometimes more than once) to confirm results especially for the German VP I reported to. however there was a problem with a Autometer digital pot scrubbing speedometer that would not calibrate several years back that we chased for 50 hours (or more). I even had a sillyscope on the signal. We did what your not supposed to and changed 3 or 4 things at once and it magically started working. UHH I didn't backtrack on that one
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