2001 Ford Mustang bucking and shaking when accelerating or

Tiny
DG_RAZAK
  • MEMBER
  • 2001 FORD MUSTANG
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 89,500 MILES
My car is bucking and shaking, I can hear the pipe rattle against the bumper when I accelerate. I have no cats, aftermarket magnaflow catback exhaust. droppd exhaust nothing is clogged. New fuel FIlter, spark plugs, New Plugs and wires to the sparkplugs and injectors. Just changed oil after 3000 miles. MIL eliminators to turn off "check engine light from missing catalytic converters" We had to clear out the cats because of a small accident that shattered one of the honey combs in the cats. Got the MIL eliminators for the check engine light for that. I don't know what to think, just started happening a week ago. Car has no problem maintaining speed just hard time gaining speed.


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Monday, December 17th, 2007 AT 6:00 PM

2 Replies

Tiny
BLACKOP555
  • EXPERT
First thing you can do is clean the throttle body, it may have excessive carbon build up in it.

Also check the fuel pressure at the rail with car running and car off, post back your findings on that.

Next check and clean the MAF sensor and EGR valve
also check the PCV valve and hose for cracks and cuts.

All else fails change that converter, can be causing excessive backpressure on accelleration boggin it down.
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Monday, December 17th, 2007 AT 8:30 PM
Tiny
DG_RAZAK
  • MEMBER
I checked the egr valve, its clean and working fine. Checked the PCV Valve, no cracks, got a new hose anyways. I don't have a tool to check the fuel pressure but I'm basically running out of options. I thought it could be the fuel pressure sensor but, if I give the care alot of gass, it will jump in and out of its "bucking and shacking" and sometimes act normal. It feels like somethings clogged but I can't figure out what. When you say clean the throttle body. Do you just mean clean it, because when I take off the intake pieces, the throttle body is nice and clean inside. Something I have noticed is that when the car is cold, I have lots of power and the power seems to over power the shaking and bucking. When the car is warm or hot, the problem is at its most irritating point. I also forgot to mention I bought MAF Sensor Cleaner and cleaned the MAF, noticed a big difference in horsepower. Intresting, I have more horsepower but still the same bucking and shaking problem. Before I cleaned the MAF and After I cleaned it I noticed that if the car is warm or hot, and I give it gas to try and make it go, I smell fuel. I smell a alot of fuel as if I had it on my hands. Also, if I start the car when its warm or hot and let it sit in park for a while and then move it, it shakes less and bucks less. Except when I cruising and try to give it gas. I know I'm rambling but 100.00 for a scope is alot of money and if you guys figure it out, I'd much rather donate the money to you guys instead of a machine heh. THank you for your help
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Thursday, January 10th, 2008 AT 6:15 PM

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