There can be many causes of a rough idle. But if the engine runs good under acceleration and then idles rough, there are 2 things I would look at. First look to see if you have a vacuum hose disconnected, broken, or cracked. Secondly depending on the make and model, check the EGR valve. This is just the main 2 causes as there are more.
-also rotor and distributor cap arcing - use only original dealer parts
-O2 sensor slow - if it is old replace
-ignition wires old or incorrectly routed
-if gas smell do a fuel pressure leak-down test - should hold 50psi for 10 mins or more. May be pressure regulator or line leaking or bad fuel pump
Many things can cause a rough idle. Bad plugs, plug wires, broken or leaking vacuum hose, defective fast idle solenoid, just to name a few.
I had a similar problem and it was my coil pack
I own a 98 Lexus ES 300. I struggled with the same issue. The problem was the EGR Valve. It is an emission part. The total part and installation was around $300.00. It was a little expensive, but it cured the problem and have not had any problems since then. Hope this helps. Mark
Touch Me I Like It Rough (Dubstep)
Rough Music - 2013 was released on: USA: 2013
It could be the fuel pump, if its when you first start the car up
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.
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.
too much fuel (unburned) getting into the exhaust. could be your oxygen sensor or catalyst converter. less likely, a leaking fuel injector
timing off
Taking your foot off the accelerator.
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 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