wont start after its warmed?

02gtbangstang · March 1st, 2011, 11:03 PM

hey guys,
On the 86 5.0 i just picked up, like the title says, the car with fire right up first turn of the key. But once it warms up to normal operating temp and the car is shut off it will not start until i let it sit for bout an hour. Anybody had this problem or know what wrong?

henry03250 · March 1st, 2011, 11:12 PM

What do u mean after it warms up? Can u Drive it around for a while with no problems?

gripthenboost · March 1st, 2011, 11:13 PM

I think the starter is old, check to see I the car has aftermarket headers, they might cause the starter to get hot so when you try to start the car again it won't be able to turn because it locked up, just my 2 cents it happened to me.

02gtbangstang · March 1st, 2011, 11:20 PM

ya henry i can start it, drive around fine and idles just fine. But like i said if it reaches normal operating temp it wont fire back up. But if its cold and i start it and shut it off right away it will start right up again. Only does this after the engine is hot?

gripthenboost · March 1st, 2011, 11:25 PM

Is the motor even cranking over?

02gtbangstang · March 1st, 2011, 11:57 PM

ya its cranking over just fine!

ryanw · March 1st, 2011, 11:59 PM

Id try a new starter or a heat shield of some sort, or do both

02gtbangstang · March 2nd, 2011, 12:04 AM

even tho its turning over ok and trying to start but wont?

marshall88lx · March 2nd, 2011, 12:13 AM

I had this same problem , it was vapor lock my fuel line was right next to my header!

ryanw · March 2nd, 2011, 12:16 AM

Originally Posted by 02gtbangstang

even tho its turning over ok and trying to start but wont?

oh..... well then im not sure... i thought you were saying it wouldnt crank when it was hot.

fogged306 · March 2nd, 2011, 12:47 AM

Originally Posted by 02gtbangstang

even tho its turning over ok and trying to start but wont?

If it's turning over just the same hot as it is cold but it just won't fire, then it's not a starter issue. These cars do have problems killing starters with heat especially if you have longtubes, but the classic symptoms of a starter dying from the heat is slow cranking.

Originally Posted by marshall88lx

I had this same problem , it was vapor lock my fuel line was right next to my header!

I've seen this before too and it would be a good thing to check. It's free and easy to do.

1989Gt. · March 2nd, 2011, 01:38 AM

mine does this as well but it turns over slow as shit and its a pain to start is it the heat from my xpipe maybe causing my starter to screw up?

gripthenboost · March 2nd, 2011, 08:34 AM

Originally Posted by 1989Gt.

mine does this as well but it turns over slow as shit and its a pain to start is it the heat from my xpipe maybe causing my starter to screw up?

you have long tubes?

1989Gt. · March 2nd, 2011, 03:48 PM

No but i know my xpipe is right there and my shorty headers im just saying it does get hot under my hook lol, ALso it slow cranks and is a biotch to start and it only happens when its warm

02gtbangstang · March 2nd, 2011, 09:31 PM

Fogged306, how do i test to see if it is vapor lock?

henry03250 · March 2nd, 2011, 10:21 PM

So you can just crank forever after its been warm and shut off untill the battery runs down and nothing? no sputterin or spitting or even trying to start?

817B!GT3X · March 3rd, 2011, 12:23 AM

Get the tfi module tested. More than likely its the tfi module.

Aswell ground cables. Yes beilive me a ground cable can cause this. It can probally be the one that goes to the frame and battery post. That was the problem on mine.

1989Gt. · March 3rd, 2011, 12:31 AM

how do you test the tfi module?

fogged306 · March 3rd, 2011, 01:44 AM

Originally Posted by 02gtbangstang

Fogged306, how do i test to see if it is vapor lock?

I have no idea how to actually test for vapor lock. I just had a friends car do something very similar. Only his would run like crap when it got hot and if you shut it off, it wouldn't start until it cooled. We noticed that the fuel lines were really close to the headers, so we moved them away from them just to see if that was the problem, and just like that, the car never had that issue again.

I just meant to check and see if the fuel lines were close to the headers.

1989Gt. · March 3rd, 2011, 09:56 PM

See this only happens when i warm the car drive it somewhere and come back and try to start itll crank slow, then when the car is cooler it willfinally start still on slow cranking.

March 1st, 2011, 11:03 PM	#1
02gtbangstang Regular 2002 Mustang Gt 13.0 Join Date: Jan 2008 Location: Greeley, Co Posts: 267 iTrader: 0 reviews	wont start after its warmed? hey guys, On the 86 5.0 i just picked up, like the title says, the car with fire right up first turn of the key. But once it warms up to normal operating temp and the car is shut off it will not start until i let it sit for bout an hour. Anybody had this problem or know what wrong? __________________ bbk longtubes,bbk hpipe,flowmasters,CAI,mgw shtshft, Nitrous, mach2 ram air hood, 04 cobra frntbmpr,saleen s281 drag wing, 04 svt chrome wheels, "HONDAS ARE LIKE TAMPONS EVERY PUSSY HAS ONE!"

March 1st, 2011, 11:13 PM	#3
gripthenboost Hardcore Enthusiast 91 Mustang GT 1991 sliver GT Join Date: Apr 2010 Location: New York Posts: 1,213 iTrader: 0 reviews	I think the starter is old, check to see I the car has aftermarket headers, they might cause the starter to get hot so when you try to start the car again it won't be able to turn because it locked up, just my 2 cents it happened to me. __________________

March 1st, 2011, 11:20 PM	#4
02gtbangstang Regular 2002 Mustang Gt 13.0 Join Date: Jan 2008 Location: Greeley, Co Posts: 267 iTrader: 0 reviews	ya henry i can start it, drive around fine and idles just fine. But like i said if it reaches normal operating temp it wont fire back up. But if its cold and i start it and shut it off right away it will start right up again. Only does this after the engine is hot? __________________ bbk longtubes,bbk hpipe,flowmasters,CAI,mgw shtshft, Nitrous, mach2 ram air hood, 04 cobra frntbmpr,saleen s281 drag wing, 04 svt chrome wheels, "HONDAS ARE LIKE TAMPONS EVERY PUSSY HAS ONE!"

March 1st, 2011, 11:25 PM	#5
gripthenboost Hardcore Enthusiast 91 Mustang GT 1991 sliver GT Join Date: Apr 2010 Location: New York Posts: 1,213 iTrader: 0 reviews	Is the motor even cranking over? __________________

March 1st, 2011, 11:57 PM	#6
02gtbangstang Regular 2002 Mustang Gt 13.0 Join Date: Jan 2008 Location: Greeley, Co Posts: 267 iTrader: 0 reviews	ya its cranking over just fine! __________________ bbk longtubes,bbk hpipe,flowmasters,CAI,mgw shtshft, Nitrous, mach2 ram air hood, 04 cobra frntbmpr,saleen s281 drag wing, 04 svt chrome wheels, "HONDAS ARE LIKE TAMPONS EVERY PUSSY HAS ONE!"

March 1st, 2011, 11:12 PM	#2
henry03250 Regular 85 Gt, 95 Gt Join Date: Apr 2010 Location: Arkansas Posts: 50 iTrader: 0 reviews	What do u mean after it warms up? Can u Drive it around for a while with no problems?

March 1st, 2011, 11:59 PM	#7
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	Id try a new starter or a heat shield of some sort, or do both __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

March 2nd, 2011, 12:04 AM	#8
02gtbangstang Regular 2002 Mustang Gt 13.0 Join Date: Jan 2008 Location: Greeley, Co Posts: 267 iTrader: 0 reviews	even tho its turning over ok and trying to start but wont? __________________ bbk longtubes,bbk hpipe,flowmasters,CAI,mgw shtshft, Nitrous, mach2 ram air hood, 04 cobra frntbmpr,saleen s281 drag wing, 04 svt chrome wheels, "HONDAS ARE LIKE TAMPONS EVERY PUSSY HAS ONE!"

March 2nd, 2011, 12:13 AM	#9
marshall88lx Newbie 88 Mustang lx Join Date: Apr 2010 Location: Millbrook,al Posts: 43 iTrader: 0 reviews	I had this same problem , it was vapor lock my fuel line was right next to my header!

March 2nd, 2011, 01:38 AM	#12
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	mine does this as well but it turns over slow as shit and its a pain to start is it the heat from my xpipe maybe causing my starter to screw up?

March 2nd, 2011, 03:48 PM	#14
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	No but i know my xpipe is right there and my shorty headers im just saying it does get hot under my hook lol, ALso it slow cranks and is a biotch to start and it only happens when its warm

March 2nd, 2011, 09:31 PM	#15
02gtbangstang Regular 2002 Mustang Gt 13.0 Join Date: Jan 2008 Location: Greeley, Co Posts: 267 iTrader: 0 reviews	Fogged306, how do i test to see if it is vapor lock? __________________ bbk longtubes,bbk hpipe,flowmasters,CAI,mgw shtshft, Nitrous, mach2 ram air hood, 04 cobra frntbmpr,saleen s281 drag wing, 04 svt chrome wheels, "HONDAS ARE LIKE TAMPONS EVERY PUSSY HAS ONE!"

March 2nd, 2011, 10:21 PM	#16
henry03250 Regular 85 Gt, 95 Gt Join Date: Apr 2010 Location: Arkansas Posts: 50 iTrader: 0 reviews	So you can just crank forever after its been warm and shut off untill the battery runs down and nothing? no sputterin or spitting or even trying to start?

March 3rd, 2011, 12:23 AM	#17
817B!GT3X Regular Join Date: May 2008 Posts: 159 iTrader: 0 reviews	Get the tfi module tested. More than likely its the tfi module. Aswell ground cables. Yes beilive me a ground cable can cause this. It can probally be the one that goes to the frame and battery post. That was the problem on mine.

March 3rd, 2011, 12:31 AM	#18
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	how do you test the tfi module?

March 3rd, 2011, 09:56 PM	#20
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	See this only happens when i warm the car drive it somewhere and come back and try to start itll crank slow, then when the car is cooler it willfinally start still on slow cranking.

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