96 GT 2v stutters under WOT

[invertmast]

Already did its not them.. This is more noticeable when you let out the clutch.. Its kinda like a very low frequency vibration, like something is rubbing, but nothing is.

 

[invertmast]

OK,
re-gapped the plugs to .035" and its about the same as before i regapped them.. I know what the rubbing/grinding is now, so i'm not worried about it..

But i'm still wondering whats up with the stuttering in 3rd + gears when you go to WOT... maybe the tunes just off and its got alot of fuel being poured to it and its taking a while to clean out???

 

[COramprat]

Could be...I know older cars would flood out with a goofy carb and shut down. Now the computer seems to sense it and pull fuel. What kind of tune do you have?

 

[invertmast]

From what I understand, when you buy the FRPP supercharger, they send a recalibrated computer when you purchase the "install" kit for the Supercharger... But i do plan on getting it dyno tuned, when i slap on the 3.1" pulley

 

[stangGT97]

From what I understand, when you buy the FRPP supercharger, they send a recalibrated computer when you purchase the "install" kit for the Supercharger... But i do plan on getting it dyno tuned, when i slap on the 3.1" pulley

i would have tuned it when i put on the supercharger in the first place.... your tune could be causing lean spots in the power band. If its not that, do you still have the stock clutch? Maybe its slipping which is causing a studdering sensation, mine does that a little

 

[invertmast]

i bought the car used 2 1/2 weeks ago w/ everything already done to it, and it just started doing this about a week and a half ago.. The car also has a Centerforce dual friction clutch in it.

 

[blackfang]

For the stuttering, guys, don't waste your money on fuel injector cleaner from the auto store. Half the crap has an alcohol base and can wear down the inside of the injectors over time, and two, its going to be diluted to the point it wont even do a thing by the time it gets in the injector.

I would check the MAF and have it cleaned. Make sure you have the screen still in it. Also have any of you rotated the maf at all? that can play a factor in it.

 

[mrvax]

Another oft overlooked thing is the throttle body. Visually inspect it for gunk buildup. You should be able to have the car running (with some help) and spray carb cleaner in the TB. Spray it until it's nice and clean with the engine running.

 

[96gtcan2]

mass air sensor dirty maybe that would be my only guess

Second that. My car was doing the same thing I used some contact cleaner on the maf and cleaned the screen and problem solved. Also it could be you coil packs.

 

[invertmast]

MAF and IAT sensor's cleaned
And
Coil packs replaced.. Its not as bad anymore, but it still does it between 2200 and 2800 rpm, then it clears up and runs like a scalded dog...