It might be the idle air control valve. It is about a $40.00 part. It is a cylinder shaped unit bolted down with 2 bolts with 2 wires attached, located between the air intake and the throttle body.
it could also be just a simple tune up. try replacing the plugs and coil packs/ wires. (i forgot what Ford used then, i believe there coil packs.)
If you have replaced plugs and wire most likely one of your coil pack usually run about $50
Rough idling is whenever the vehicle's motor "misses" or does not fire causing an imbalance and a loss of rotation reducing the motor's power and causing excessive shaking.
my 1990 300zx is idling rough what could cause this?
have they check the timing on it. sometimes when timing is off by a few degrees it would cause both rough idle and backfiring. also check for a dead cylinder.
Motor is idling rough.
There are many symptoms of a bad O2 sensor. Some are poor fuel efficiency, flashing check engine light, the failure to pass a smog test, and rough idling.
Rough idle, low injector pressure Sputtering stalling. lack of power
Rough idling and hesitation can be caused by several different things. The most common causes are; bad spark plugs, bad spark plug wires, and a dirty air filter.
My 1986 Honda Accord Dx just started idling rough and dieing at turns and stops it is a carburated 2.0 witha maunal transmission
a longer cam shaft will make a car idle rough
You dont you replace the timing control module
I would suggest a new set of plug wires.
At 35mph it runs rough. Also when idling it will quit running, sometimes. Does that sound like I need new spark plugs? How many miles are new plugs & wires good for?
Old-style army jeeps were known for their rough engine operation, often described as "coughing" or "sputtering" and "clattering."
Could be a number of things. Start by performing any maintenance items that are due and listed in you owner's manual. If you have not done so, replace all vacuum hoses, including the brake booster hose. Check the booster for a cracked or leaking diaphragm. Replace the hoses one at a time to avoid getting confused. If it idles rough but runs good under acceleration, then a vacuum leak is probable.
Scan for codes, some parts store do it free.
Belt is probably not timed correctly.
The most common cause of rough idling would be a bad or clogged fuel injector. Also look for the hose on your EGR valve. They tend to come off in hot weather. If the hose comes off the engine will definitely run rough. I had to put a small hose clamp on mine to keep it from comming off. Spiritchsr1
It could be a couple of things... First thing is have your computer read by a scanner. Auto Zone will read codes for FREE. And go from there. I had a similar problem on my 1998 Ford Expedition XLT, and it ended been bad spark plugs. And since I have the 4.6L on mines I had to change plugs and wires. Problem was fix. The 4.6L only has 2 coil packs too... But, since you have the 5.4L it could also be bad coil packs... There 8 coil packs on the 5.4L.
Rough idling and sometimes kills the motor. It could also trip the check engine light to come on.
Poor performance on takeoff ... rotten gas mileage ... rough idling ... hard starting.
if it's idling rough, I would suggest cleaning the throttle body with carburetor cleaner.
The most classic symptom is erratic or rough idling.
why is my ford sport trac run rough at idling. Being that the check engine light is on, start with having the codes read. Your local auto parts store can help with that at no cost.