Question about 2004 Ford Mustang

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2004 ford mustang jerks when accelerating at 45 mph

When accelerating at around 40+ MPH, my Mustang jerks and then levels back off at about 55 MPH. I put some fuel injector cleaner in about 30 miles back, but no change.

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1 Answer

Stay out of the Genie in a bottle isle

There has never been a manufactures factory service
manual or owners manual that require ANY additives to
any vehicle system

There not necessary & DO NOT WORK

The car is over 10 years old

Have the spark plugs been changed every 3 years
Have you replaced ALL the ignition coils around 6 to 8 year
or when they have misfired or failed
The front Oxygen Sensor get replaced on ALL vehicles at 100,000
miles
Have you been on a road test with a professional scan tool to look at data,have to do that a couple times a year
Is the EGR System working
Do you have any Vacuum leaks

Could go on all night

Just have to work on it several times a year

Have you checked for codes not just Generic
but Enhanced?

Posted on Apr 01, 2014

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 975 Answers

SOURCE: 2004 Ford F150 XF4 has a humming noise from rear

Ring and pinion noise for sure,yes. Check for play right at the yoke where the drive shaft goes in.
I've seen a few fords where the pinion nut was loose and after re torquing they lasted another 100,000

Posted on Jan 08, 2011

  • 76 Answers

SOURCE: FUEL DELIVERY DRIVIABILITY ISSUE

it could mean that you have a leak and the proper amount of fuel isn't getting to the engine.

Posted on Oct 23, 2008

  • 6 Answers

SOURCE: 1992 Thunderbird with 25K miles. At 45 mph, when it

THE BAND COULD BE BURND OR THE SERVO PISTON THAT APPLIES THE BAND MAY BE CRACKED/BROKEN OR BAD O-RING ON PISTON

Posted on May 07, 2009

  • 10865 Answers

SOURCE: 2006 expedition knocks at 40-45 MPH

Toss a couple cans of engine medic into your gas tank and I bet you will solve alot of your problem

Posted on Aug 23, 2009

  • 449 Answers

SOURCE: THE CHECK ENGINE LIGHT STAYS ON AND THE CAR SURGES

Check your throtle position sensor. You need to check the code when the light is on.

Posted on Oct 20, 2009

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