== == == == We had this problem with our 2001 escort and we were told that we had a lot of carbon build up. We had a tune up and a carbon flush and it did way better. I had this problem, I thought it was electrical since it mainly happened when I turned on the lights or heater. I changed out the fuel filter and the problem was fixed. I also have a small vacuum leak in a hose off the valve cover that adds a little to the vibration. Answer My 98 zx2 has the same problem. I took it in and my mechanic told me that there had been a maintenence recall on the transmission mounts. they said the transmission mounts on zx2s tend to wear out over time and that causes the vibration. they also said you'll know that's the problem if it smooths out in neutral. Tune up will probably help. Kind of sounds like your fule filter may be cloged. if the cam belt has been changed recently the cam positioning sensor could be bad so if you know someone with a programmer talk to them to be sure This could be due to damage/deterioration of the motor mounts. The next time you take your ZX2 in to be serviced ask the technician to check the motor mounts for excessive wear. I was experiencing this very issue on my 2000 ZX2 and it turned out to be a leak in the hose that connects to the PCV Valve. Replaced the hose and the engine smoothed out. ANSWER This is due to a design issue with the engine. There is a Technical Service Bulletin from Ford TSB 031515 that involves reconfiguring the motor mounts. I've chosen to just live with it.
sounds like a vacuum leak
Is this when in idle? Perhaps you need to replace your spark plugs, maybe if it is fuel injected, you may need to clean the fuel system.
it only studders at low rpm it runs great at high rpm or accelerating only at idle and take off rpm
I have 1998 a Lincoln town car with the same problem.. It idles rough when you start, then smooths out once it warms up and you give it gas. From what I am reading its either an oxygen sensor or you have vacume leak in one of your hoses by the manifold.
I have 200,+ miles on the car. I change the plugs and wires yet it runs rough at idle and runs smooth at crusing speed. What can i do?
Try a compression test to see what results you get.
jerking speed 40 50
Why does my 2000 Pontiac Grand Am, with a 2.4L engine, run rough at idle but runs normally when placed in neutral? I changed the plugs and air filter, but the problem continues.
Have vehicle scanned to determine the problem
it depends on many things. if is an old car carburated and it is rough at idle, then mixture could be a factor.
Check your vacuum hose.
Remove, clean or replace the IAC (Idle Air Control) valve.
Vacuum line leak especially if it runs rough at idle. Bad spark plugs or plug wires.
Bad oxygen sensor
Rough idle could be: spark plugs(worn or wrong gap), plug wires, vacuum leaks, wrong ignition timing, uneven or low compression. Transmission trouble--check fluid level.
A clogged fuel filter can cause a Mitsubishi Galant to idle rough for the first 10 minutes it is running and then it runs fine after that. A fouled spark plug can also cause this issue.
you need the fast idle adjusted on the engine you may have idle set where it sounds fine in idle but not high enuff when dropped in gear.
Remove, clean, replace IAC (Idle Air Control).
hard to say but if it runs rough & this is related you may have a leaking intake manifold or head gasket causing vacuum loss (reason for rough idle) & leaking out the antifreeze - both are expensive to repair
Once your out of idle the idle air control valve isn't used so it shouldn't affect the operation of the car once your moving
on newer cars with fuel injection if fuel pump sterts getting weak it could cause that happened to me
Check the idle air motor.
a pile of poo
Bad gas. Could be a natural function of the idle. If the sound is loud, rough, and uneven, yet the car runs smoothly everywhere else, it might be the way the car is tuned.