1986 5.0 won't start when hot

mustang1077 · 07-04-2008, 08:48 AM

Hello,

I have a modified 1986 5.0 that won't start when it gets hot. It will barely crank and then won't crank at all when I try to start it hot. When the car is cold it will start just fine and after the car cools off it will start just fine. I don't have to jump it or anything. I have replaced the starter, starter soleniod, battery, and had the 140 amp alternator tested. The battery has been relocated to the trunk and has a good negative ground. I replaced the postitive battery cable with a 2 gauge wire. I have also checked the timing and set it at 14 degrees advanced. When the car cools and can be restarted the timing is still set at 14 degrees. This problem came about by itself. I did not make any mods when the problem started. I have not replaced the starter relay. Please let me know what you think.

goodyear1984 · 08-11-2008, 05:49 PM

do you have long tube headers? how does the body to enging ground look?

07-04-2008, 08:48 AM	#1
mustang1077 Registered Member Join Date: Jul 2008 Posts: 1	1986 5.0 won't start when hot Hello, I have a modified 1986 5.0 that won't start when it gets hot. It will barely crank and then won't crank at all when I try to start it hot. When the car is cold it will start just fine and after the car cools off it will start just fine. I don't have to jump it or anything. I have replaced the starter, starter soleniod, battery, and had the 140 amp alternator tested. The battery has been relocated to the trunk and has a good negative ground. I replaced the postitive battery cable with a 2 gauge wire. I have also checked the timing and set it at 14 degrees advanced. When the car cools and can be restarted the timing is still set at 14 degrees. This problem came about by itself. I did not make any mods when the problem started. I have not replaced the starter relay. Please let me know what you think.

08-11-2008, 05:49 PM	#2
goodyear1984 Registered Member Join Date: Dec 2006 Location: new york Posts: 482	Re: 1986 5.0 won't start when hot do you have long tube headers? how does the body to enging ground look? __________________ 347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters ^best et so far 11.6 1.61 60ft coming soon 9sec et's 1992 mustang gt 2001 gmc 1500 4x4 78 century boat 92 skidoo

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
1986 5.0 with 85 shortblock	spiff	Windsor Power	8	07-13-2006 08:52 AM
1986 5.0 Mods	Comatose	Windsor Power	19	03-05-2004 10:52 PM
1986 vs. 1994 mustang	chiaronate	Windsor Power	9	10-14-2003 11:29 PM
Curb weight of 1986 GT	Dean Williamson	Windsor Power	9	07-24-2003 01:33 AM
1986 Brake problems	eeh1025	Windsor Power	6	02-05-2003 12:16 PM