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Old 08-12-2012, 02:30 AM   #1
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3.8 dies in hot weather

Hi guys ive been having have issues with my 96 mustang 3.8. When its really hot outside like high 90s, my car stumbles and dies after about 30 mins. Sometimes it will restart and I can drive it for another min before it dies again but usually Ill have to let it cool and then it starts in runs the cycle again. Ive done some searching and found this to be a very common problem with all mustangs and based on symptoms of other ive narrowed it down to either the fuel pump or the tfi module. Only thing is the 96 and up mustangs dont have a tfi module do they? Did ford replace it with something similar and change its name or what else should I look for? any help is appreciated.
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Old 08-12-2012, 09:27 AM   #2
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Originally Posted by texasfinest1
Hi guys ive been having have issues with my 96 mustang 3.8. When its really hot outside like high 90s, my car stumbles and dies after about 30 mins. Sometimes it will restart and I can drive it for another min before it dies again but usually Ill have to let it cool and then it starts in runs the cycle again. Ive done some searching and found this to be a very common problem with all mustangs and based on symptoms of other ive narrowed it down to either the fuel pump or the tfi module. Only thing is the 96 and up mustangs dont have a tfi module do they? Did ford replace it with something similar and change its name or what else should I look for? any help is appreciated.
Mine was doing that and i figured out my cooling fan wasnt coming on. id drive the car and it would heat up and stop. I changed the fan and then everything was fine, ir could be that and if it is id be alooot cheaper to fix
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Old 08-12-2012, 03:26 PM   #3
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Need more info. Is your temp gauge rising as your car is on?
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Old 08-12-2012, 04:58 PM   #4
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Re: 3.8 dies in hot weather

my gauge does rise above what I think is normal but i dont know. Always was like this from the day I bought it. It rises over to the "m" and "a" on the hand. but fan kicks on it cools it back down. My ford truck on the other hand never gets above half on the temp gauge and that goes for any other car Ive ever owned
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Old 08-12-2012, 05:12 PM   #5
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Originally Posted by texasfinest1
my gauge does rise above what I think is normal but i dont know. Always was like this from the day I bought it. It rises over to the "m" and "a" on the hand. but fan kicks on it cools it back down. My ford truck on the other hand never gets above half on the temp gauge and that goes for any other car Ive ever owned
Does the radiator have and leaks? Is your coolant level good?
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Old 08-12-2012, 05:49 PM   #6
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Re: 3.8 dies in hot weather

coolant level is good. no leaks anywhere
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Old 08-12-2012, 10:21 PM   #7
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Re: 3.8 dies in hot weather

could also be the ignition module...if its going faulty when it overheats it'll cause the car to shut down. they can be tested at any autoparts store. just another idea if the fan thing doesn't play out
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Old 08-13-2012, 09:10 AM   #8
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Does the engine run rough when it is on?
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Old 08-13-2012, 11:52 PM   #9
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Re: 3.8 dies in hot weather

It runs really well except when it starts to act up like its starving for fuel..bucking and jerking and if I push the gas it dies.. It may start back up but barely still bucking... Have to let it cool down and it's fine for another 20 to 30 miles... But I can drive it all night long without any problems.. Only does it when it's really hot
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Old 08-14-2012, 08:48 PM   #10
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Kind of sounds like fuel pump. Maybe it has a defect so when it gets hot it stops working right. I know things can do that. My dads boat motor had a starter cylinoid that did it.
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Old 08-14-2012, 10:55 PM   #11
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The start up problem does sound like a fuel pump. On my old car that was happening, id start up and it sounded like it was starving for gas and i replaced the fuel pump and it stopped doing that.

Now i dont know why itd only be doing it when its hot?
Or does it do this all the time when you start up?
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Old 08-15-2012, 02:50 AM   #12
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Re: 3.8 dies in hot weather

Only on really hot days after driving 20 to 30 miles
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Old 08-15-2012, 06:29 AM   #13
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Quote:
Originally Posted by joey18
The start up problem does sound like a fuel pump. On my old car that was happening, id start up and it sounded like it was starving for gas and i replaced the fuel pump and it stopped doing that.

Now i dont know why itd only be doing it when its hot?
Or does it do this all the time when you start up?
Sometimes there will be something wrong inside of it and heat can kill it. When it cools down it can be ok though. Change fuel pump or take it to a mechanic and report back
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