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05-03-2009, 12:50 PM
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CC Member
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Join Date: Jul 2003
Location: Corinth,
NY
Cobra Make, Engine: Antique & Collectable 302, C-4,Ford 9 inch
Posts: 251
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Not Ranked
Help! My cobra shuts itself off?
Looking for help and advice in tracking down this intermittent problem:
Driving along at highway speeds, anywhere from 30 to 45 mph. Not during acceleration but cruising. Engine shuts off.
Here are some clues:
- Rebuilt 1968 302 engine is always warm and up to temperature
- there is no sputtering or hesitation
- does not happen at idle
- does not happen when I accelerate
- does not happen every time
- running electronic distributor with ford parts
I am apt to believe I have an electrical problem, since the engine never stutters, hesitates or misfires. But if I am wrong someone tell me.
If anyone has input where I might start to track down this annoying problem I would appreciate all advice.
__________________
Jerry
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05-03-2009, 12:57 PM
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Senior Club Cobra Member
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Join Date: Feb 2005
Cobra Make, Engine: Contemporary, FE, Tremec TKO 600
Posts: 1,985
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Not Ranked
Fuel injected or carbed? What ignition are you running? I know it's Ford, but what is it?
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05-03-2009, 12:58 PM
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CC Member
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Join Date: Jan 2008
Location: Williamsport,
PA
Cobra Make, Engine: Kellison Stallion 468 FE
Posts: 2,703
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Not Ranked
without more troubleshooting info its hard to make a call. but the first thing are the basics , fuel, spark, then output of the alternator, bad wire from ignition, msd? duraspark? loose coil wire?
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05-03-2009, 01:07 PM
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Senior Club Cobra Member
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Join Date: Feb 2004
Cobra Make, Engine:
Posts: 1,226
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Not Ranked
Does it start right back up or does it have to sit for a while?
Jim
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05-03-2009, 01:18 PM
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CC Member
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Join Date: Jul 2003
Location: Corinth,
NY
Cobra Make, Engine: Antique & Collectable 302, C-4,Ford 9 inch
Posts: 251
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Not Ranked
Pull to the side of the road, put it in park, starts right up.
-running a carb
__________________
Jerry
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05-03-2009, 01:36 PM
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CC Member
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Join Date: Jan 2002
Location: Bridgewater,
NJ
Cobra Make, Engine: B & B
Posts: 1,323
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Not Ranked
Could it be vapor Lock?
__________________
Just enough knowledge to build a cobra and be dangerous...
You can observe a lot from just watching.
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05-03-2009, 02:05 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Neutral safety switch.
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Chas.
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05-03-2009, 02:08 PM
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Senior Club Cobra Member
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Join Date: Feb 2004
Cobra Make, Engine:
Posts: 1,226
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Quote:
Originally Posted by jerry w
Pull to the side of the road, put it in park, starts right up.
-running a carb
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Bad ignition switch or loose wire in the ignition system? I hate intermittent problems.  If the damn thing would just stay broken, it would be an easy fix.
Jim |
05-03-2009, 02:10 PM
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Senior Club Cobra Member
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Join Date: Feb 2004
Cobra Make, Engine:
Posts: 1,226
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Quote:
Originally Posted by ERA Chas
Neutral safety switch.
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That only effects the starting circuit. It does nothing once the engine is running.
Jim |
05-03-2009, 02:59 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
Replace the Module inside the distributor, and the "BOX". Heat is causing open circuit.
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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05-03-2009, 06:50 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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I stand corrected JWD. I think Rick is on the right path. Is that the famous Ford "Thick film module"?
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Chas.
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05-03-2009, 07:05 PM
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CC Member
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Join Date: Feb 2001
Location: St. Louis, Missouri,
MO
Cobra Make, Engine: SPO 2715
Posts: 1,648
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crack in the coil allowed the oil to get out.
Coil gets hot, engine quits,
Change coil
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05-03-2009, 07:09 PM
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CC Member
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Join Date: Apr 2004
Location: Scotts Valley,
CA
Cobra Make, Engine: ERA 289 FIA #2108
Posts: 1,882
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Not Ranked
Yeah, check the coil. Get your DMM and test the voltage on the - and + poles. Jump in and drive around until it dies. Verify that it won't start right up, test the output on the coil again. I'll bet you on either the + or - poles you get the wrong voltage.
Make sure if you have an oil filled coil it is standing upright in it's mount, not laying on it's side.
DD
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Dangerous Doug
"You're kidding, right?"
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05-03-2009, 07:27 PM
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Senior Club Cobra Member
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Join Date: Feb 2004
Cobra Make, Engine:
Posts: 1,226
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Heat issues require a cooling off period that this situation doesn't appear to need. I'm still betting on a bad switch or a loose connection. Been there, done that. If it starts right back up, it's not a heat issue.
Jim
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05-03-2009, 07:57 PM
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Club Cobra Member
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Join Date: Mar 2001
Location: Southern,
NJ
Cobra Make, Engine: CSX4300, C5AE-H, Toploader
Posts: 695
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Not Ranked
Jerry I am not a big guy and on occasion my knee has slightly rubbed the ignition switch and shut the car down. Sounds simple just something to consider.
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05-04-2009, 05:57 PM
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CC Member
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Join Date: Jul 2003
Location: Corinth,
NY
Cobra Make, Engine: Antique & Collectable 302, C-4,Ford 9 inch
Posts: 251
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Not Ranked
Thank you all for replying. I am going to start eliminating all the possibilites mentioned one by one until I find the problem. Love this forum.
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Jerry
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05-04-2009, 08:29 PM
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Senior Club Cobra Member
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Join Date: May 2001
Location: Florence,
AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
Posts: 4,511
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Not Ranked
check you fuel filter.
Dwight
__________________
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"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
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05-04-2009, 10:05 PM
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CC Member
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Join Date: Nov 2000
Location: Tucson,
Az
Cobra Make, Engine: Superformance 427 Side-Oiler
Posts: 2,156
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Not Ranked
Had a similar issue with a MSD Distributor.It turned out to be the magnet in the distributor was cracked thus interupting the "field".
__________________
The rest of the world can have their opinion about the United States just as soon as WE give it to them.
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05-05-2009, 06:25 AM
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Stolen Avitar
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Join Date: Oct 2004
Location: Brunswick,
GA
Cobra Make, Engine: BDR 1311 428PI
Posts: 3,044
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Not Ranked
Quote:
Originally Posted by jerry w
Pull to the side of the road, put it in park, starts right up.
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I think it's just rebelling because it has an automatic! 
Steve |
05-05-2009, 03:17 PM
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CC Member
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Join Date: Jul 2003
Location: Corinth,
NY
Cobra Make, Engine: Antique & Collectable 302, C-4,Ford 9 inch
Posts: 251
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Not Ranked
ahhh, lest ye forget the highest price ever paid for a cobra at BJ auction was...........equiped with an automatic! 
__________________
Jerry
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