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V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters
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Old 12-12-2012, 10:47 AM   #1
sickofstupidity

 
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Vehicle: 2000 Ford Mustang Coup V6 3.8
Location: South Carolina
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Default Acceleration Problems

I bought a 2003 Ford Mustang V6 with about 180k miles on it. The guy kept good care of the car. Well at least the exterior of it. I have had it for about 2 months and lately I have noticed that it is having problems with that burst of speed. It jerked/bucked on me while accelerating to get onto the interstate one time but it has never happened again but I have noticed a decrease in response time from the time I hit the accel pedal and when the car speeds up. I started using premium gas in it since I have had it. I'm not sure if I screwed something up or not. I am concerned about the lack of pulling (acceleration):

fuel related?
transmission related?
engine related?
exhaust related?

Any ideas?
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Old 12-13-2012, 07:24 AM   #2
Ironhandx
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Whats done to the car? What gear were you in when it happened? Did it happen right after you were shifting gears?

Is the transmission manual or automatic?
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Old 12-13-2012, 10:10 PM   #3
robb15033
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-Always replace the fuel filter every oil change or every other, depending on type of oil used and recommended intervals of change. (Twice a year maybe).
You HAVE TO replace the ignition parts now as a good start to a preventive maintenance program & help eliminate or second guess yourself. Copper spark plugs at the very least. Plugs, wires and ignition coil at the most.
-Check for vacuum/air leaks around upper intake and around engine bay.
-With everything checked out and good to go, give it a Seafoam treatment. One can in the gas tank, more importantly, one can sucked up into engine while running through any vacuum line or straight through pcv valve.
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Old 12-15-2012, 10:13 AM   #4
LilRoush
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Higher octane fuel does nothing for you - especially if you aren't tuned for it. You can skip that.
A cough / sputter could have been anything from a little water in the gas to a missed spark.
I'd start by pulling out the spark plugs and checking them for wear.
Also check to make sure your airfilter is clean.

Quote:
Originally Posted by robb15033 View Post
-Always replace the fuel filter every oil change or every other, depending on type of oil used and recommended intervals of change. (Twice a year maybe).
You HAVE TO replace the ignition parts now as a good start to a preventive maintenance program & help eliminate or second guess yourself. Copper spark plugs at the very least. Plugs, wires and ignition coil at the most.
-Check for vacuum/air leaks around upper intake and around engine bay.
-With everything checked out and good to go, give it a Seafoam treatment. One can in the gas tank, more importantly, one can sucked up into engine while running through any vacuum line or straight through pcv valve.
Huh?
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Old 12-17-2012, 04:58 AM   #5
sickofstupidity

 
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thanks guys this is REALLY GREAT INFO!!!!
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Old 12-17-2012, 04:58 AM
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