5.0 Will run to normal temp. Die and won't start again.

1981Mcapri · January 13th, 2013, 02:22 AM

I have a 1981 Mercury Capri, which is the same as a Mustang, and I can't go out, fire it up drive it about oh.... 2 miles, until it heats to NORMAL temperature. Then, It will die and won't start back. It's losing spark somehow. it won't start until it cools completely.
I'm getting irritated with it, and tempted to send it to the crusher..
List of new parts.
Motor.
Distributer.
Ignition control mod.
coil.
alternator.
Battery.
solenoid.
Voltage regulator.
ANY help would be appreciated.

Fink · January 13th, 2013, 02:24 AM

Sounds like a crank sensor.

Sent from my droid using my fingers.

bigTom1 · January 13th, 2013, 02:32 AM

Not sure an 81 has a computer let alone a crank sensor

1981Mcapri · January 13th, 2013, 02:33 AM

It's from a late 70's model Bronco. Do they have crank sensors?
This car came with a 255ci v8. The owner before me changed it to a 302. It ran perfect until I shattered my oil pump shaft through a cylinder wall. it runs like a dream until it heats up. and just bamm. dead. and won't restart until it has cooled off.

1981Mcapri · January 13th, 2013, 02:36 AM

And I've not been able to find any computers. I've looked everywhere in it for one.

bigTom1 · January 13th, 2013, 02:39 AM

And like a distributor or ignition control module. I know they are new. I would try again

bigTom1 · January 13th, 2013, 02:39 AM

Fuel pump also.

1981Mcapri · January 13th, 2013, 02:41 AM

It's loosing spark, not fuel.. I might try the Dizzy... I had the ICM tested for hours, passing flawlessly.

bigTom1 · January 13th, 2013, 02:45 AM

Hmm, crazy man. Do the dizzy again

narleycarley · January 13th, 2013, 08:16 AM

Went through this with my 91 years ago. I replaced distributor and it was fine for about two weeks then would do it again. Where is your coil located? Anywhere it could be getting hot? Is your coil a good brand?

All I can suggest is getting another distributor from a known good running car and see if that fixed it.

I never could get problem resolved, traded mustang in and now I see it around town sometimes. This was my very first mustang also.

Sent by carrier pigeon

FastStang91Lx · January 13th, 2013, 08:18 AM

Originally Posted by Fink

Sounds like a crank sensor.

That's why some people should just stick to what they know.

No, your car has no crank sensor, nor a computer. I assume that you've checked for spark when it won't start and that's how you know it's spark and not fuel? Check power to coil when that's happening and keep working your way backwards.

TBacon · January 13th, 2013, 08:56 AM

^This

NeverEnuff · January 13th, 2013, 01:56 PM

Does this thing have an ECU? Did you convert it to EFI? I know it didn't come factory with one...just asking. There have been several A9L/ECU issues that when the car heats up, it dies and won't restart till it cools. Its a ECU problem. Thats why I asked. If you have the 81 body, then its impossible to put the ECU in the stock location. If someone converted it, then the ECU is chilling someplace else.

I know this may not be much help, esp if you have no ECU. But just trying to help. I went through the same thing with my 91 LX for 2 years. Would die hot, and restart cold perfect. Ended up being the ECU.

Have you verified its spark? Like when it won't start, have you pulled a plug quickly and turned it over checking it?

1981Mcapri · January 13th, 2013, 03:11 PM

No, it's not an EFI. And, narleycarley, It's an accell superstock coil from autozone, was one of the more expensive ones, but it's located on the intake.This link is to a picture of the OLD motor, i don't have a new one on here, but this is where everything is located at.
And, Neverenuff, when it won't start, I tried that. and I can crank all day and not a fire, but as soon as I let off the key, It'll get one shot of spark, but still won't start.

1981Mcapri · January 13th, 2013, 03:11 PM

http://s1359.beta.photobucket.com/us...tml?sort=3&o=2

NeverEnuff · January 13th, 2013, 03:26 PM

Roger that. Just checking. Sounds like to me something is getting heat soaked.

1981Mcapri · January 13th, 2013, 03:30 PM

That's what I was thinking. But, all the electronics stay actually pretty cool.

deputycrawford · January 13th, 2013, 05:04 PM

Old Chryslers wouldn"t start until the key was released because of the starting system balast resistor. I don't believe this car has one but check with something simple like a starter relay and a fuseable link somewhere in the starting system. I may be way off but you might have to think out of the box and let us know what you figure out.

Jerry

FastStang91Lx · January 13th, 2013, 06:23 PM

Originally Posted by 1981Mcapri

That's what I was thinking. But, all the electronics stay actually pretty cool.

You're coil isn't staying cool right there no matter what you think. I'd move that even if it don't fix it.

FormulaFord · January 13th, 2013, 08:00 PM

Never been a fan of Accel products. I would find a stock coil and agree with the others about moving it.

January 13th, 2013, 02:22 AM	#1
1981Mcapri Newbie Join Date: Jan 2013 Posts: 7 iTrader: 0 reviews	5.0 Will run to normal temp. Die and won't start again. I have a 1981 Mercury Capri, which is the same as a Mustang, and I can't go out, fire it up drive it about oh.... 2 miles, until it heats to NORMAL temperature. Then, It will die and won't start back. It's losing spark somehow. it won't start until it cools completely. I'm getting irritated with it, and tempted to send it to the crusher.. List of new parts. Motor. Distributer. Ignition control mod. coil. alternator. Battery. solenoid. Voltage regulator. ANY help would be appreciated.

January 13th, 2013, 02:24 AM	#2
Fink M112'd Sixxer 1999 Mustang V6 Join Date: Feb 2012 Location: Wynyard, SK Posts: 1,313 iTrader: 0 reviews	Sounds like a crank sensor. Sent from my droid using my fingers. __________________ Garage: 1999 Mustang V6 M112 4R70W (Elise) Sponsored by Ortiz Performance 1998 Suzuki Esteem 1.6L 5 speed(Suzi/Low Self Esteem)

January 13th, 2013, 08:16 AM	#10
narleycarley Happy Happy Happy 2001 Mustang GT Join Date: Nov 2012 Location: Cove, Texas Posts: 1,820 iTrader: 1 reviews	Went through this with my 91 years ago. I replaced distributor and it was fine for about two weeks then would do it again. Where is your coil located? Anywhere it could be getting hot? Is your coil a good brand? All I can suggest is getting another distributor from a known good running car and see if that fixed it. I never could get problem resolved, traded mustang in and now I see it around town sometimes. This was my very first mustang also. Sent by carrier pigeon __________________ Nominate your favorite car for ROTM!!

January 13th, 2013, 01:56 PM	#13
NeverEnuff 4 cam 4 life 1989 LX Coupe 6.1@111mph Join Date: Jan 2009 Location: Texas Posts: 2,413 iTrader: 0 reviews	Does this thing have an ECU? Did you convert it to EFI? I know it didn't come factory with one...just asking. There have been several A9L/ECU issues that when the car heats up, it dies and won't restart till it cools. Its a ECU problem. Thats why I asked. If you have the 81 body, then its impossible to put the ECU in the stock location. If someone converted it, then the ECU is chilling someplace else. I know this may not be much help, esp if you have no ECU. But just trying to help. I went through the same thing with my 91 LX for 2 years. Would die hot, and restart cold perfect. Ended up being the ECU. Have you verified its spark? Like when it won't start, have you pulled a plug quickly and turned it over checking it? __________________ 89 Coupe-Worlds Fastest NA Modular build in progress http://www.moddedmustangs.com/forums...lar-build.html 02 GT-Mark shortblock, notched pistons, MHS cams 01 Lightning-build in progress

January 13th, 2013, 03:26 PM	#16
NeverEnuff 4 cam 4 life 1989 LX Coupe 6.1@111mph Join Date: Jan 2009 Location: Texas Posts: 2,413 iTrader: 0 reviews	Roger that. Just checking. Sounds like to me something is getting heat soaked. __________________ 89 Coupe-Worlds Fastest NA Modular build in progress http://www.moddedmustangs.com/forums...lar-build.html 02 GT-Mark shortblock, notched pistons, MHS cams 01 Lightning-build in progress

January 13th, 2013, 02:32 AM	#3
bigTom1 Regular Join Date: Oct 2012 Posts: 179 iTrader: 0 reviews	Not sure an 81 has a computer let alone a crank sensor

January 13th, 2013, 02:33 AM	#4
1981Mcapri Newbie Join Date: Jan 2013 Posts: 7 iTrader: 0 reviews	It's from a late 70's model Bronco. Do they have crank sensors? This car came with a 255ci v8. The owner before me changed it to a 302. It ran perfect until I shattered my oil pump shaft through a cylinder wall. it runs like a dream until it heats up. and just bamm. dead. and won't restart until it has cooled off.

January 13th, 2013, 02:36 AM	#5
1981Mcapri Newbie Join Date: Jan 2013 Posts: 7 iTrader: 0 reviews	And I've not been able to find any computers. I've looked everywhere in it for one.

January 13th, 2013, 02:39 AM	#6
bigTom1 Regular Join Date: Oct 2012 Posts: 179 iTrader: 0 reviews	And like a distributor or ignition control module. I know they are new. I would try again

January 13th, 2013, 02:41 AM	#8
1981Mcapri Newbie Join Date: Jan 2013 Posts: 7 iTrader: 0 reviews	It's loosing spark, not fuel.. I might try the Dizzy... I had the ICM tested for hours, passing flawlessly.

January 13th, 2013, 02:45 AM	#9
bigTom1 Regular Join Date: Oct 2012 Posts: 179 iTrader: 0 reviews	Hmm, crazy man. Do the dizzy again

January 13th, 2013, 03:11 PM	#14
1981Mcapri Newbie Join Date: Jan 2013 Posts: 7 iTrader: 0 reviews	No, it's not an EFI. And, narleycarley, It's an accell superstock coil from autozone, was one of the more expensive ones, but it's located on the intake.This link is to a picture of the OLD motor, i don't have a new one on here, but this is where everything is located at. And, Neverenuff, when it won't start, I tried that. and I can crank all day and not a fire, but as soon as I let off the key, It'll get one shot of spark, but still won't start.

January 13th, 2013, 03:30 PM	#17
1981Mcapri Newbie Join Date: Jan 2013 Posts: 7 iTrader: 0 reviews	That's what I was thinking. But, all the electronics stay actually pretty cool.

January 13th, 2013, 05:04 PM	#18
deputycrawford 85 GT convertible 1985 GT contverible Join Date: Dec 2012 Location: Toledo, Ohio Posts: 328 iTrader: 0 reviews	Old Chryslers wouldn"t start until the key was released because of the starting system balast resistor. I don't believe this car has one but check with something simple like a starter relay and a fuseable link somewhere in the starting system. I may be way off but you might have to think out of the box and let us know what you figure out. Jerry Last edited by deputycrawford; January 13th, 2013 at 05:10 PM. Reason: spelling

January 13th, 2013, 08:00 PM	#20
FormulaFord Newbie 1969 Fastback Join Date: Dec 2012 Location: North Carolina Posts: 17 iTrader: 0 reviews	Never been a fan of Accel products. I would find a stock coil and agree with the others about moving it.

Remove Advertisements Sponsored Links
Ford Mustang Forum Advertisement

All times are GMT -4. The time now is 10:32 AM.
Contact Us - Modded Mustangs : Ford Mustang Forums - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2013, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.