Upon deceleration, vehicle drops idle to 400-500 RPM and fluctuates. Sometimes stalls, causing loss of power steering, and brakes. Vehicle was serviced, replaced idle air control valve, reducing intensity and frequency of problem, not correcting it. Car has been taken in for service three seperate times, twice they could find nothing wrong with the vehicle. Upon consulting with other 2000 mustang gt owners, it is common problem. Some vehicles are still stalling heavily upon deceleration. If vehicle stalls, power brakes and steering are lost without warning, possible causing an accident. I am encouraging others with same problem to report to nhsta. This problem was reported to ford consumer relations today, 5/10/01. This problem occurs on 99-2000 mustang gt with manual transmission.
2000 Ford Mustang acceleration complaints
Page 2 of 2: complaints 11 to 19 of 19, newest first, as owners wrote them.
When vehicle is put into gear, from park to drive/reverse, and when vehicle comes to a stop, it will accelerate suddenly for a moment, then stop. This happens mostly during cold weather conditions, and will happen from 25 to 50 percent of the time. Dealership could not determine any defect. A second dealership replaced torque converter, and verified that there was a problem. It was a possible software defect - no upgrade available to repair defect. Please provide any additional information/attachments.
Idle set too high at stop light idles up to 2000, jerks forward, dealership unable to fix.
Engine stalls when full braking applied at highway speeds, causing sudden loss of power assisted steering and braking. 2 seperate instances. Dealer checked and found nothing noteable, made minor adjustment to throttle settings. 1 week later, second instance occurred, motor dying 3 times. Driver forced to place manual transmission in neutral, depress clutch, and restart motor, which restarted each time, but forced driver to attempt to start car, control car, and stop car simultaniously.
Vehicle idles too low, dealer can't adjust it.
Car is irratic and engages into cruise control and out of cruise control whenever.
Car stalls after putting in the clutch or shifting to neutral sometimes. I lose all power steering and brakes causing me to miss stop signs, cannot corner due to loss of steering etc. Ford knows it has a problem with 1999 and 2000 mustang gt but has no fix and is telling the dealers to do nothing!!!!! My family's and my life are in danger and I feel as though this should come under the lemon law. It does not happen everytime but the car cannot find it's idle speed until the car is at a dead stop. Sometimes it goes to 1000 RPM and sometimes as low as 400 RPM at which time it stalls.
Engine idle flucuates between 350 and 1000 RPM's dropping sporadically.
When I come to complete stops, (e.g. @ a red light) the tachometer slowly rises to 3,000 - 3,500 RPM's and the engine compartment shakes and roars as if I am accelerating. This has occurred at least 35 times since the original occurrence on 12/19/1999. I have not driven the vehicle since 02/29/1999. The car has been to two ford dealerships six time to fix the problem. The following items have been replaced: air bypass valve, iac (3 times - they claimed each one, including the original was faulty), on board computer. Yet the problem still persists. Ford has finally agreed to reacquire my vehicle. I have spoken to other 2000 mustang gt owners (all with vehicles built in 09/1999) they also have idle issues. The two I have spoken with have a reverse problem. Theirs idle so low, the vehicle stalls. I think ford should look into the gt's that were built early in the model year. I have not heard of anything with the gt's built later in the year.
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