I would suspect the idle speed motor is faulty. Does the motor sometimes idle fine and then other times rough? They are about $100.00 last time I had priced one. Your dealer can price one and print out a picture of it and where it is located so you can recognize it.....1930fcoupe
AC/Delco
I would suggest a new set of plug wires.
I had the same problem ,if you did it go back and recheck and check again ,mostly the distrib cap ,plugs and wires. If you went to a pro ,take it back and have them review their work. Hope this helps ,good luck!
Rough idling on a 2001 Chevy Metro after a timing belt change could be caused by improper timing adjustments, leading to a misalignment of the engine's timing. Additionally, issues such as vacuum leaks, faulty spark plugs, or incorrect fuel mixture can contribute to rough idling. It's also possible that sensors like the mass airflow sensor or throttle position sensor were disturbed during the repair, affecting engine performance. Checking these components and ensuring proper installation can help resolve the issue.
If you have replaced plugs and wire most likely one of your coil pack usually run about $50
A car that is idling rough and then dies could have several potential issues. Common causes include a dirty or failing idle air control valve, a clogged fuel filter, or problems with the ignition system, such as worn spark plugs or faulty coils. Additionally, vacuum leaks or issues with the fuel injectors can also lead to rough idling. It's advisable to have the vehicle diagnosed by a mechanic to pinpoint the exact problem.
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.
because of ignition coil faulty.due to mountings,abnormal fuel pressure.
Rough idling in a 1996 Geo Tracker can be caused by several factors, including a dirty or faulty idle air control valve, vacuum leaks in the intake system, or issues with the fuel delivery system such as a clogged fuel filter or failing fuel pump. Additionally, worn spark plugs or ignition components can lead to misfires, contributing to rough idling. Regular maintenance and thorough inspection can help identify and resolve these issues.
my 1990 300zx is idling rough what could cause this?
Yes. Bad spark plugs, bad spark plug wires and a bad distributor cap are the common causes of rough idling. If it has been a while since you changed these components, do so.
Motor is idling rough.