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Old 05-18-2013, 07:34 AM   #1
Dragonus18
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Join Date: May 2007
Vehicle: 2003 mustang gt
Location: miami fl
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Default Mustang mystery problem????

Ok. A strange thing happened the other day. I was driving down the street and it started to rain which is no big deal. It wasn't raining hard and there weren't any big puddles on the road. On my way home the started to jerking as I was about 30-40mph a little on the hard side. I called my tuner up (who is also a mechanic) and told him what happened when I crawled it home and he had me check my MAF (which was unreachable since it was in the right fender and I just installed an Anderson power pipe ) and then plug in my Predator handheld. No CEL light were on so he had me do some checking around in the Predator and than told me to check my coils and my fuel rails. He also had me unplug a electronic device in the middle of the fuel rail that was attached to a hose and told me to turn the car in the on position because fuel would shoot out of there when I did for a second but when I did nothing happened. As of yesterday the problem just happen to go away and the car is now running fine!? This has me baffled. I know this might be a tough one to crack but if anyone might have a clue as to what happened I would be very grateful. Thanks always guys!!!
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03 Mustang GT
Mods: Forged aluminum block
Procharger P-1SC stage 2 unit/ intercooled
BBK Longtube ceramic coated headers
BBK off road X-pipe
Borla cat-back exhaust
BBK 78mm throttle body/ plenum
MMR 1-5/8 full length subframe connectors
Dual Aeroforce Interceptor scan gauges
Drag suspension/ Nitto 555R's/ rear seat delete
Anderson power pipe
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Old 05-18-2013, 05:04 PM   #2
FlamingoGT
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A shot in the dark, but maybe the fuel pump going bad? Or something not so serious and easier to fix maybe a clogged fuel filter?
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Old 05-18-2013, 05:17 PM   #3
Dragonus18
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I just got a fuel system done. I doubt it but what else can it be?
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Old 05-19-2013, 12:24 AM   #4
jjstandardz
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Quote:
Originally Posted by Dragonus18 View Post
Ok. A strange thing happened the other day. I was driving down the street and it started to rain which is no big deal. It wasn't raining hard and there weren't any big puddles on the road. On my way home the started to jerking as I was about 30-40mph a little on the hard side. I called my tuner up (who is also a mechanic) and told him what happened when I crawled it home and he had me check my MAF (which was unreachable since it was in the right fender and I just installed an Anderson power pipe ) and then plug in my Predator handheld. No CEL light were on so he had me do some checking around in the Predator and than told me to check my coils and my fuel rails. He also had me unplug a electronic device in the middle of the fuel rail that was attached to a hose and told me to turn the car in the on position because fuel would shoot out of there when I did for a second but when I did nothing happened. As of yesterday the problem just happen to go away and the car is now running fine!? This has me baffled. I know this might be a tough one to crack but if anyone might have a clue as to what happened I would be very grateful. Thanks always guys!!!
Sounds the exact same as what happened to my mustang. One (or most likely more) of the coil on plugs are going bad, or the boots are worn out/leaking. My car used to sputter real bad and miss when i would hit puddles or drive in the rain or anything like that. I could not figure it out it would just go away after a day (water dries up).

After a while the COPS will short out and it will always do it though, i just replaced all of mine with accel aftermarket ones and it runs like brand new.
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Old 05-19-2013, 09:02 AM   #5
Dragonus18
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Quote:
Originally Posted by jjstandardz View Post
Sounds the exact same as what happened to my mustang. One (or most likely more) of the coil on plugs are going bad, or the boots are worn out/leaking. My car used to sputter real bad and miss when i would hit puddles or drive in the rain or anything like that. I could not figure it out it would just go away after a day (water dries up).

After a while the COPS will short out and it will always do it though, i just replaced all of mine with accel aftermarket ones and it runs like brand new.
Do they go bad after a certain amount of miles or a certain amount of time? I just had my block built and the motor has almost its first 1,000 miles. I have originally 57,000 miles on the odometer. I barely drive this thing.
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Old 05-20-2013, 07:58 PM   #6
Dragonus18
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bump!
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03 Mustang GT
Mods: Forged aluminum block
Procharger P-1SC stage 2 unit/ intercooled
BBK Longtube ceramic coated headers
BBK off road X-pipe
Borla cat-back exhaust
BBK 78mm throttle body/ plenum
MMR 1-5/8 full length subframe connectors
Dual Aeroforce Interceptor scan gauges
Drag suspension/ Nitto 555R's/ rear seat delete
Anderson power pipe
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Old 05-21-2013, 05:41 PM   #7
Stevo86
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Mileage is irrelevant. Your car is 10 years old, rubber cracks. Simple check is to pull them out and look at them.
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Old 05-21-2013, 06:56 PM   #8
Dragonus18
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Quote:
Originally Posted by Stevo86 View Post
Mileage is irrelevant. Your car is 10 years old, rubber cracks. Simple check is to pull them out and look at them.
I'm guessing just check and see if they're cracked or worn out? Is it an expensive fix to replace them? Never did this before.
__________________
03 Mustang GT
Mods: Forged aluminum block
Procharger P-1SC stage 2 unit/ intercooled
BBK Longtube ceramic coated headers
BBK off road X-pipe
Borla cat-back exhaust
BBK 78mm throttle body/ plenum
MMR 1-5/8 full length subframe connectors
Dual Aeroforce Interceptor scan gauges
Drag suspension/ Nitto 555R's/ rear seat delete
Anderson power pipe
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Old 05-21-2013, 07:13 PM   #9
Seabee1993
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Three bucks a piece for new boots isn't that big of an investment. Coils will essentially last forever, if you get them wet, or feed them after midnight.
Joking aside I think it's every 30/50k you should consider replacing the boots.
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Old 05-21-2013, 11:10 PM   #10
Dragonus18
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Quote:
Originally Posted by Seabee1993 View Post
Three bucks a piece for new boots isn't that big of an investment. Coils will essentially last forever, if you get them wet, or feed them after midnight.
Joking aside I think it's every 30/50k you should consider replacing the boots.
Ok. Thanks for telling me. I had no idea. That's a tiny fix. I should try that one for sure. Other than that is there anything else that maybe comes to mind?
__________________
03 Mustang GT
Mods: Forged aluminum block
Procharger P-1SC stage 2 unit/ intercooled
BBK Longtube ceramic coated headers
BBK off road X-pipe
Borla cat-back exhaust
BBK 78mm throttle body/ plenum
MMR 1-5/8 full length subframe connectors
Dual Aeroforce Interceptor scan gauges
Drag suspension/ Nitto 555R's/ rear seat delete
Anderson power pipe
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Old 05-21-2013, 11:10 PM
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