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Old 12-15-2014, 12:43 AM   #1
03stangmach1
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Join Date: Jul 2009
Location: Boston, Mass.
Posts: 112
Help please power issues

Hi and thank everyone for your time
54,000 miles
Heres a little background my friend is an ASE masters certified mechanic and mustang nut he is working on my car this year we fixed alot of things Hers a list

Plugs , new air filter, Coils ,Mccloud clutch, new ford performance clutch cable and quadrant, oil presure switch, o2 sensors probably more

Mods are Mccload clutch,pro 5.0 shifter , quadrant and adjuster, Jlt ram air intake, BBK long tube headers, BBK H-pipe, Borla Stingers.

So my friend says the car does not have the power it should when he did testing on a snap on solus he found that there was an oil presure switch bad for the computer side so we changed that and it woke up alot but it still isnt right he has done a compression test they were all within 2% of each other and close to the high on factory compression numbers, Fuel presure was good, no codes, runs smooth, revs fast, but when your going along lets say in secound and stomp the trottle it doesnt throw you in the seat seems to take time getting up to speed with and without the trac control on. In my friends sn with 4.6 2V it would pin you and blow the tires off.
we did a few 0-60 pull with good traction and the average was 7.2.
It used to have a diablo sport and was returned to stock could this have anything to do with this? is it real stock tune or diablos idea of stock?

When we did the plugs they all looked to be burning good and there is no fuel was on and or in the oil, and there hasnt been any major lean conditions almost feels like some kind of fail safe. Do theese cars have computer issues?

Any help in the right direction would be great were stumped Thanks
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Old 12-15-2014, 01:44 AM   #2
01yellerCobra
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Join Date: Jan 2013
Location: San Diego, CA
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What rpm are you at when you get on it? These are small engines. They won't pull like a pushrod at 2500rpm. When I was stock I kept it above 4k when I was messing around.
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Old 12-15-2014, 09:58 AM   #3
Mach828
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Join Date: Nov 2009
Location: Albuquerque, NM
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Re: Help please power issues

Whats it run at the track?

Get it dyno tuned and see what it puts down.

Hard to say its down on power just by going with the butt dyno.
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