99 2v hesitation/shaking at WOT

joshjwc9

Active Member

Jun 12, 2006

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Palm Harbor, FL

Apr 23, 2007

#1

• Apr 23, 2007

• #1

Like the title says, under roughly 3/4's to WOT the Mustang hesitates and shakes the whole car (I can feel it thru the shifter and my seat) then starts accelerating from there....

It wasnt doing this last nite, but I went WOT 1st and 2nd without the motor at operating temperature (on for roughly 5 minutes) and started feeling this.

Is it drivetrain (clutch, clutch cable related)?

Or fuel delivery or something as simple as a dirty MAF or filter?

Oil change and filter along with a K&N recharge are going to be done this upcoming Saturday BTW...

 

K

Kilgore Trout

Fried or Broiled ?

10 Year Member

Mar 30, 2005

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Apr 23, 2007

#2

• Apr 23, 2007

• #2

Going WOT before the engine came up to temp probably did not help. Never EVER do that.

 

DTNODYA

Member

Dec 15, 2005

831

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16

Apr 24, 2007

#3

• Apr 24, 2007

• #3

Kilgore Trout said:

Going WOT before the engine came up to temp probably did not help. Never EVER do that.

Click to expand...

+1

It won't hurt to clean the MAF. It could also be your fuel filter but I doubt it. I'd think that if it were your fuel filter then it would hesitate throughout the gears. Check your tranny fluid .....

 

joshjwc9

Active Member

Jun 12, 2006

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Palm Harbor, FL

Apr 24, 2007

#4

• Apr 24, 2007

• #4

Now, it doesnt do it in every gear, if it was motor related wouldnt it do it whenever im accelerating no matter the speed? No weird sounds are heard at idle either....or revving up at idle...

 

K

Kilgore Trout

Fried or Broiled ?

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Mar 30, 2005

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Apr 24, 2007

#5

• Apr 24, 2007

• #5

If it does not do it in every gear more likely it is drivetrain rather than engine. How many miles on your clutch and who installed it?

 

RandyStinchcomb

New Member

May 25, 2005

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Randallstown, Md

Apr 24, 2007

#6

• Apr 24, 2007

• #6

sounds like a sparkplug or COP problem to me

 

K

Kilgore Trout

Fried or Broiled ?

10 Year Member

Mar 30, 2005

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Apr 24, 2007

#7

• Apr 24, 2007

• #7

RandyStinchcomb said:

sounds like a sparkplug or COP problem to me

Click to expand...

So you think it is spark related. Perhaps water or coolant in the plug wells? That is easy enough to check...

 

RandyStinchcomb

New Member

May 25, 2005

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Randallstown, Md

Apr 24, 2007

#8

• Apr 24, 2007

• #8

yeah, it may not show-up at idle as bad but as load(and speed) increases, resistance increases and mis-fire can occurr

 

joshjwc9

Active Member

Jun 12, 2006

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Palm Harbor, FL

Apr 24, 2007

#9

• Apr 24, 2007

• #9

Could it also be driveshaft/motor mount related...thats what a Honda buddy suggested...

Im currently babying it as I have no other ride and trying to avoid putting the car through that stress...im prolly gonna go take a day off of work to have my trusty mechanic take a look at it....

And as for water/coolant in the plug wells wouldnt that burn off? I havent touched the plugs or topped off coolant since way before this started happening...

 

04fullitgt

I shower with poo

Nov 13, 2006

0

0

0

Crest Hill, Illinois

Apr 24, 2007

#10

• Apr 24, 2007

• #10

RandyStinchcomb said:

yeah, it may not show-up at idle as bad but as load(and speed) increases, resistance increases and mis-fire can occurr

Click to expand...

+1
my buddies stang did the same thing and it turned out to be a COP on its way out.

 

jivepepper

Founding Member

Jun 19, 2002

776

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Under a Sombrero. in WV.

Apr 24, 2007

#11

• Apr 24, 2007

• #11

Maybe you sucked up a honda in the intake? I would guess a spark problem.

 

joshjwc9

Active Member

Jun 12, 2006

1,095

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Palm Harbor, FL

Apr 26, 2007

#12

• Apr 26, 2007

• #12

We have 2 winners! It has been narrowed down to a spark issue.

More than likely it is the coil that was replaced by the previous owner with non Motorcraft stuff...

 

RandyStinchcomb

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May 25, 2005

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Randallstown, Md

Apr 26, 2007

#13

• Apr 26, 2007

• #13

joshjwc9 said:

We have 2 winners! It has been narrowed down to a spark issue.

More than likely it is the coil that was replaced by the previous owner with non Motorcraft stuff...

Click to expand...

ummm, no comment

 

joshjwc9

Active Member

Jun 12, 2006

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Palm Harbor, FL

Apr 26, 2007

#14

• Apr 26, 2007

• #14

04fullitgt said:

+1
my buddies stang did the same thing and it turned out to be a COP on its way out.

Click to expand...

jivepepper said:

Maybe you sucked up a honda in the intake? I would guess a spark problem.

Click to expand...

RandyStinchcomb said:

ummm, no comment

Click to expand...

Looks like I cant count

Thanks guys...I figured to pull out the plugs and am taking them to get tested...I already swapped in a new set of plugs and the car is fine!