Rough idle and engine shake at 2000 RPM - Ford Mustang Forum
 
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post #1 of 7 (permalink) Old 04-12-2004 Thread Starter
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Unhappy Rough idle and engine shake at 2000 RPM

I have a 5 speed, 99 gt w/ stock fuel system.

The car idles at 700+ RPM, it kicks this up and down most likely due to the smog control.

At 2000 RPM, the engine shakes really bad, can even feel it when running at 65mph. the shaking stops at around 2500 RPM.

Anyone experienced this?

Could it be a faulty fuel injector or maybe a coil pack?

Any help would be appreciated.


Black 99 GT
-- Current Mods: FIPK, C&L Plenum, 70mm FRPP Throttle Body, Steeda Triax Shifter, BBK Upper and Lower control arms.
-- Dyno @ 2500ft in elevation on a DynoJet 233.2 hp and 273.8 Torque
-- Future Mods: 4:10 Gears, Exhaust, Super
-- Current best time with only FIPK and pinging like an sob:
1/4 mile, Reaction - .139, 60ft - 2.284, ET 14.316, MPH - 98.278
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post #2 of 7 (permalink) Old 04-12-2004
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Almost sounds like a vacuum leak... That would be the first thing I would look for. Any loss of power?

post #3 of 7 (permalink) Old 04-12-2004 Thread Starter
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Quote:
Originally posted by Mana4Real
Almost sounds like a vacuum leak... That would be the first thing I would look for. Any loss of power?
Nope...no loss of power that I am aware of, though it has had this problem since I bought it.

Any common places for a vacuum leak that I should start looking?


EDIT: BTW...after driving it this afternoon, its a wheel balance issue on the shaking the whole car at 2grand but when at a stand still, the engine is smooth after idle until 2 grand where it shakes a bit until about 2500 - 3 grand

Black 99 GT
-- Current Mods: FIPK, C&L Plenum, 70mm FRPP Throttle Body, Steeda Triax Shifter, BBK Upper and Lower control arms.
-- Dyno @ 2500ft in elevation on a DynoJet 233.2 hp and 273.8 Torque
-- Future Mods: 4:10 Gears, Exhaust, Super
-- Current best time with only FIPK and pinging like an sob:
1/4 mile, Reaction - .139, 60ft - 2.284, ET 14.316, MPH - 98.278

Last edited by skyducker; 04-12-2004 at 09:13 AM.
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post #4 of 7 (permalink) Old 04-13-2004
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The rough idle could be due to a dirty PCV valve or air filter, and the shaking is probably from alignment or needs balancing.

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post #5 of 7 (permalink) Old 04-23-2010
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HEY...i have a 2002 mustang v6. im having some troubles with the engine or whatever it is. ive taken it to dealers and i cant find the problem with it..It runs rough over 2500 rpms and the check engine light blinks. Then it goes away after a while. I cant even get over 55 mph in 4th gear. It has an exhaust system on it idk if that has anything to do with it or what. Does anyone know what i can do to fix this cause idk what to do. Thanks
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post #6 of 7 (permalink) Old 04-23-2010
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Quote:
Originally Posted by navyaz09 View Post
HEY...i have a 2002 mustang v6. im having some troubles with the engine or whatever it is. ive taken it to dealers and i cant find the problem with it..It runs rough over 2500 rpms and the check engine light blinks. Then it goes away after a while. I cant even get over 55 mph in 4th gear. It has an exhaust system on it idk if that has anything to do with it or what. Does anyone know what i can do to fix this cause idk what to do. Thanks
Take your car to advance auto parts or autozone and they will pull the code for you. After that look it up and see what the code means then go from there. No body can tell you what's wrong until you get the code.

2000 4.6l mustang
03 Swap Rebuilt, Pacesetter Longtube Headers, Pacesetter O/R X Pipe, SLP lm1, Professional Products 75mm TB/Plenum,SR Underdrive pulleys, EGR Delete, Mac CAI, Diablosport 93oc tune, FRPP 4.10 Gears, 31 spline FRPP Trac loc+ 31 spline axles, 2" cut springs, Drilled and Slotted rotors/Hawk brake pads, Accel Super Coils, Stall+Shift kit AUTO fml
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post #7 of 7 (permalink) Old 04-24-2010
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To the v6 guy that means a miss fire when your engine light flashes. its your coil packs or wires which ever you have or bad spark plugs

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