2004z71 engine light on and has a rough idle

Check engine (MIL) lamp illuminated ??
Scanned/codes retrieved ??

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The car does have a maf, but it is rarely the cause of rough idle. Rough idle is usually caused by vacuum leak, pvc issues, or idle air control valve. What does it do, specifically, and is the engine light on?

Ignition misfire, leaking intake gaskets, faulty fuel injector. Is the check engine light on and blinking with engine running?

Hi:

I am not sure if everything is related, but here are a few suggestions:

Have an auto parts store download your code from the service engile light,and see what system it is pointing too. They usually will do this for free.

Your speedometer is driven off a speed sensor, in the top of the transmission.

not sure about your clock dimming, but I would have your new alternator checked out, too, and make sure it is still charging as it should.

bmw should NOT SHAKE THE STEERING WHEEL AT ADLE. OK SOUNDS LIKE ITS RUFF UNDER LOAD LIFT THE HOOD AND CHECK FOR A HISSING SOUND IF SO IT IS VACUUM LEAK. MOST COMMON. iF TAHAT ISNT IT LETS MAKE SURE ITS IDLEING AT 800 RPM IF HIGHER PLEASE PUT ON FORM HERE AT FIX YA AND WE CAN WORK THIS OUT CHECK IDLE, CHECK ENGINE LIGHT, AND THEY ARE BAD AT NEEDING MOTOR AND TRANS MOUNTS MY BET WOULD BE ON MOUNTS

I have the same problem!Running on three.I have checked compression,wires,plugs.Changed injecters,plugs.
3 mech.cant figuire it out???

What engine?

Have you changed your fast idle valve or air idel control valve I would change the air idle valve because it is the one with an electric sensor.

I have a 1994 Cadillac Eldorado and every time i start it the car has rough Idle and the Idle fluctuate's. I also can feel it in the gas pedal when the car is doing this I tried replacing the throttle body sensor but it still does it I also was told it was the Idle error sensor. So instead of spending the unecessary money again I thought I would go online and see if anyone could help me with this problem.

have you checked out your fuel filter? I had my 2003 denali do the same type of problem and it turned out to be a very dirty fuel filter.