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Old 06-13-2002, 03:04 PM
bwlizard bwlizard is offline
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Join Date: Mar 2001
Location: kingston Il
Posts: 270
Help! Engine dies when hot

I drove my 74 Duster 360 about 3 miles last night and it quit running and would not start, this morning I went out and it fired right up. I have an electric fuel pump and could see that it was getting fuel. When I checked the spark it seemed very weak. I have a MSD box with a stock coil and distributor. Any ideas what might be wrong and why it would start after sitting ?
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Old 06-13-2002, 03:19 PM
rob_body rob_body is offline
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Join Date: Sep 2001
Location: Knoxville
Age: 34
Posts: 8

Sounds like a bad coil. If there is a break in the internal wiring of the coil that heats up it may cause that break to expaind or move apart, there by killing the current flow through the coil. A way to test this is to heat the coil up and messure the Ohms on the coil(with the car off!). Or just go to auto zone and buy one for 15 bucks and drive it around for awhile. That would be my first guess.
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Old 06-13-2002, 04:50 PM
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ehostler ehostler is offline
Join Date: Jan 2000
Location: Manassas, VA
Age: 48
Posts: 15,212

I agree. If you are getting good fuel, then the coil is shot. You mentioned the weak spark and that pretty much well confirms a bad coil.
Keep your stick on the ice.

Ed - MoPower

'06 Ram 2500 SLT QC Cummins 4X4
'68 Charger 383-4
'69 Coronet 500 Convertible 440-4

'96 Ram 1500 SLT CC 360 4X4 (traded in)

MOPAR - Move Over Power Arriving Rapidly
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Old 06-14-2002, 01:12 AM
bwlizard bwlizard is offline
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Join Date: Mar 2001
Location: kingston Il
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Thanks, I will get a coil tomorrow. Any suggestions on which one to buy ?
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Old 06-14-2002, 02:10 AM
al_jam al_jam is offline
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Join Date: Feb 2002
Location: greenville/texas
Posts: 89

if you are running the msd box why not get an msd coil. It doesnt realy matter but it would look cooler.
56' Plymouth Belvedere 2 Dr hardtop sport custom, 318, 904,
driving is fun with 4 wheel drums and a single master cylinder, no carpet and one seat.
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Old 06-14-2002, 11:09 AM
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cuda66273 cuda66273 is offline
Join Date: Dec 2001
Location: Beaverton Oregon
Age: 63
Posts: 3,687

The MSD box fires 5 sparks at each plug at 3000 RPM and lower, this will definatly over heat your STOCK coil and give you a coil melt down....go grab a MSD Blaster 2 and end your should get that distributor replaced with a MSD or a least a MP with a recurve done on it.

Good Luck and Happy Motoring.......
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Old 06-15-2002, 12:24 AM
dynorad dynorad is offline
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Join Date: Oct 2001
Location: Niwot, CO
Posts: 114

I recently had a similar problem that turned out to be a failing reluctor pickup coil in the distributor. It would stop working when it got hot.
If the ignition coil doesn't do it for you you might check out this other thing.
Measure SAE corrected power and torque yourself!
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Old 06-24-2002, 04:27 PM
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AAR4fun AAR4fun is offline
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Join Date: Oct 2000
Location: Indy
Posts: 120

sounds like vaprlock
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