Clutch going out or Fuel Pump

Predator · April 17th, 2011, 09:38 AM

I have a 1993 Mustang GT 5.0 I've been having issues with my car since I bought it in November but it has steadily gotten worse.. I thought it was the clutch slipping since the motor revs up the car moves forward good but not hard bit before you say its the clutch. Read the hole thing.. the RPM don't spike up like when u bump the clutch pedel in... if you revs it up and dump the clutch it will spin the tires. But if you hold you foot to the floor about 2500 rpm the motor sounds different... if you only use 3/4 throttle the car pulls hard as hell the moment you go full throttle the sound of the motor changes and it seems to surge.. I thought Mabel the fuel filter was. Dirty so I change it and the fuel I poured out looked really dirty but it doesn't run any better just worse... but I've never had it die on me or stall? Any help or ideas would be awesome thanks..... if its the fuel pump what is the best brand out there and should I get a new regulator?

Mustang Boy · April 17th, 2011, 07:52 PM

If you think it is the fuel pump I would stick a fuel pressure gauge on it and see what the fuel pressure does when you floor it.

skeletonpsycho · April 17th, 2011, 08:02 PM

have you check your tps,ignition timing and with the car off pull the intake pipe off and have a friend put the gas pedal to the floor to check wide open throttle usually if a fuel pump is bad its bad it wont run

Predator · April 18th, 2011, 08:14 AM

Were can you install the pressure gauge on the fuel system? What is the TPS? And I tryied to advance the timing didn't work so I put the timing back were it was before... the car will run just not at full throttle... the throttle body works fine..

flyin ryan · April 18th, 2011, 09:54 AM

there's a service port on the pas side of the motor.. look for the injectors and you'll see chrome fuel lines run down from under the upper intake manifold.. you'll see the service port it looks like a air valve from a car or bike tire.

go to autozone or advanced auto and rent a fuel pressure gauge, slap that bitch on and run it up to your windshield and tap it on so you can see it from inside the car. Drive the car and watch your fuel pressure.

gripthenboost · April 18th, 2011, 10:40 AM

Sound like fuel, is the car hesistating Or just not reacting to the clutch.

Btw that unicorn is mad gay.....

Predator · April 18th, 2011, 11:05 AM

Awesome thanks for the advice... ill do that this evening after work.... what should the pressure be at idle and full throttle?

gripthenboost · April 18th, 2011, 11:15 AM

40, but some one plz second that If not correct me

fogged306 · April 18th, 2011, 11:54 AM

With the vacuum line on the regulator you should be at about 32 at idle IIRC. If you pull the vac line off it should go up to 39 give or take a little. The fp should increase under acceleration.

flyin ryan · April 18th, 2011, 03:05 PM

Originally Posted by gripthenboost

Btw that unicorn is mad gay.....

haha

95tbirdv8 · April 18th, 2011, 04:22 PM

ive read about this problem before, and in their case it was the tps(throttle position sensor). its located on top of the throttle body. its a black think with 3 wires coming out of it

Predator · April 19th, 2011, 08:39 AM

Well I'm ruling out the fuel pump I'm getting 39 psi when you turn the key on and 30psi at Idle and 35 around 4,500 rpm... so I don't believe its a fuel issue... We started advancing the time on the motor and it runs alot better but still can't shift through all gears with out some surging or motor sound changes... could an injector be going it or bad plug? Is there a way to check the TPS (throttle position sensor) ????

95tbirdv8 · April 19th, 2011, 09:31 AM

you need a voltmeter to check the tps. this is a good video

http://youtu.be/lJEGigONelc

Predator · April 19th, 2011, 03:51 PM

Could it be a vacuum leak?????

Predator · April 19th, 2011, 10:13 PM

Stupid question I unplugged my mass air sensor and it runs like a screaming demon but the check engine light came on.. any thoughts?

Predator · April 25th, 2011, 12:27 PM

Well I figured out the problem I was having it was my Mass Air Flow Sensor it was dirty and must have been plugged up some how.... the cars like a Screaming Demon now!

I went ahead and did a junk yard mod I Installed a electric fan for $65

April 17th, 2011, 09:38 AM	#1
Predator Regular 1993 Mustang GT 5.0 Join Date: Dec 2010 Location: Henderson Posts: 99 iTrader: 0 reviews	Clutch going out or Fuel Pump I have a 1993 Mustang GT 5.0 I've been having issues with my car since I bought it in November but it has steadily gotten worse.. I thought it was the clutch slipping since the motor revs up the car moves forward good but not hard bit before you say its the clutch. Read the hole thing.. the RPM don't spike up like when u bump the clutch pedel in... if you revs it up and dump the clutch it will spin the tires. But if you hold you foot to the floor about 2500 rpm the motor sounds different... if you only use 3/4 throttle the car pulls hard as hell the moment you go full throttle the sound of the motor changes and it seems to surge.. I thought Mabel the fuel filter was. Dirty so I change it and the fuel I poured out looked really dirty but it doesn't run any better just worse... but I've never had it die on me or stall? Any help or ideas would be awesome thanks..... if its the fuel pump what is the best brand out there and should I get a new regulator? Last edited by Predator; April 17th, 2011 at 10:27 AM.

April 17th, 2011, 07:52 PM	#2
Mustang Boy Hardcore Enthusiast 1994 Mustang GT 14.582@92.58MPH Join Date: Sep 2005 Location: tampa florida Posts: 1,729 iTrader: 1 reviews	If you think it is the fuel pump I would stick a fuel pressure gauge on it and see what the fuel pressure does when you floor it. __________________ 315's Crew Black and White Crew Crew Member #2

April 17th, 2011, 08:02 PM	#3
skeletonpsycho Regular 1987 mustang GT 10.92@122 Join Date: Apr 2011 Location: ephrata pa Posts: 158 iTrader: 0 reviews	have you check your tps,ignition timing and with the car off pull the intake pipe off and have a friend put the gas pedal to the floor to check wide open throttle usually if a fuel pump is bad its bad it wont run __________________ http://www.youtube.com/watch?v=gQ7g9ystpiU 347 all motor wawa pump gas driven everywhere

April 18th, 2011, 10:40 AM	#6
gripthenboost Hardcore Enthusiast 91 Mustang GT 1991 sliver GT Join Date: Apr 2010 Location: New York Posts: 1,213 iTrader: 0 reviews	Sound like fuel, is the car hesistating Or just not reacting to the clutch. Btw that unicorn is mad gay..... __________________

April 18th, 2011, 11:15 AM	#8
gripthenboost Hardcore Enthusiast 91 Mustang GT 1991 sliver GT Join Date: Apr 2010 Location: New York Posts: 1,213 iTrader: 0 reviews	40, but some one plz second that If not correct me __________________

April 18th, 2011, 08:14 AM	#4
Predator Regular 1993 Mustang GT 5.0 Join Date: Dec 2010 Location: Henderson Posts: 99 iTrader: 0 reviews	Were can you install the pressure gauge on the fuel system? What is the TPS? And I tryied to advance the timing didn't work so I put the timing back were it was before... the car will run just not at full throttle... the throttle body works fine..

April 18th, 2011, 09:54 AM	#5
flyin ryan Banned Join Date: Jun 2008 Posts: 3,387 iTrader: 0 reviews	there's a service port on the pas side of the motor.. look for the injectors and you'll see chrome fuel lines run down from under the upper intake manifold.. you'll see the service port it looks like a air valve from a car or bike tire. go to autozone or advanced auto and rent a fuel pressure gauge, slap that bitch on and run it up to your windshield and tap it on so you can see it from inside the car. Drive the car and watch your fuel pressure.

April 18th, 2011, 11:05 AM	#7
Predator Regular 1993 Mustang GT 5.0 Join Date: Dec 2010 Location: Henderson Posts: 99 iTrader: 0 reviews	Awesome thanks for the advice... ill do that this evening after work.... what should the pressure be at idle and full throttle?

April 18th, 2011, 11:54 AM	#9
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	With the vacuum line on the regulator you should be at about 32 at idle IIRC. If you pull the vac line off it should go up to 39 give or take a little. The fp should increase under acceleration.

April 18th, 2011, 04:22 PM	#11
95tbirdv8 Enthusiast 1990 mustang gt Join Date: May 2010 Location: houston, tx Posts: 627 iTrader: 0 reviews	ive read about this problem before, and in their case it was the tps(throttle position sensor). its located on top of the throttle body. its a black think with 3 wires coming out of it __________________ Burning Rubber in the 5.0 http://www.youtube.com/watch?v=mKGSmRkKQcM95 95 mark8 lsc 95 tbird v8 90 mustang gt 07 silverado v8 08 yamaha r6 to be continued........ foxbodyperformance.com is the way to go

April 19th, 2011, 08:39 AM	#12
Predator Regular 1993 Mustang GT 5.0 Join Date: Dec 2010 Location: Henderson Posts: 99 iTrader: 0 reviews	Well I'm ruling out the fuel pump I'm getting 39 psi when you turn the key on and 30psi at Idle and 35 around 4,500 rpm... so I don't believe its a fuel issue... We started advancing the time on the motor and it runs alot better but still can't shift through all gears with out some surging or motor sound changes... could an injector be going it or bad plug? Is there a way to check the TPS (throttle position sensor) ????

April 19th, 2011, 09:31 AM	#13
95tbirdv8 Enthusiast 1990 mustang gt Join Date: May 2010 Location: houston, tx Posts: 627 iTrader: 0 reviews	you need a voltmeter to check the tps. this is a good video http://youtu.be/lJEGigONelc __________________ Burning Rubber in the 5.0 http://www.youtube.com/watch?v=mKGSmRkKQcM95 95 mark8 lsc 95 tbird v8 90 mustang gt 07 silverado v8 08 yamaha r6 to be continued........ foxbodyperformance.com is the way to go Last edited by 95tbirdv8; April 19th, 2011 at 09:38 AM.

April 19th, 2011, 03:51 PM	#14
Predator Regular 1993 Mustang GT 5.0 Join Date: Dec 2010 Location: Henderson Posts: 99 iTrader: 0 reviews	Could it be a vacuum leak????? __________________ 1993 Mustang GT 5.0 BBK cold air intake, upper and lower control arms, Ford Racing Plug Wires, Under driven pulleys, subframe connectors, King Cobra clutch, adjustable clutch cable....

April 19th, 2011, 10:13 PM	#15
Predator Regular 1993 Mustang GT 5.0 Join Date: Dec 2010 Location: Henderson Posts: 99 iTrader: 0 reviews	Stupid question I unplugged my mass air sensor and it runs like a screaming demon but the check engine light came on.. any thoughts? __________________ 1993 Mustang GT 5.0 BBK cold air intake, upper and lower control arms, Ford Racing Plug Wires, Under driven pulleys, subframe connectors, King Cobra clutch, adjustable clutch cable....

April 25th, 2011, 12:27 PM	#16
Predator Regular 1993 Mustang GT 5.0 Join Date: Dec 2010 Location: Henderson Posts: 99 iTrader: 0 reviews	Well I figured out the problem I was having it was my Mass Air Flow Sensor it was dirty and must have been plugged up some how.... the cars like a Screaming Demon now! I went ahead and did a junk yard mod I Installed a electric fan for $65 __________________ 1993 Mustang GT 5.0 BBK cold air intake, upper and lower control arms, Ford Racing Plug Wires, Under driven pulleys, subframe connectors, King Cobra clutch, adjustable clutch cable....

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