Q: Rpm's fluctuate, idles too high
So when I start my car the rpm's are around 650. Put into drive car pulls forward like I'm hitting the gas a little. Put the car in neutral or park rpm's bounce from 1000 to 2200 as if I have a vacuum leak. I replace the intake manifold gasket, injector o-rings, pcv hoses, and one vacuum line. Took to Mercedes dealership because the problem continued. They looked over everything I did and there was no problem, no leaks. They told me the only thing they could think it was is the maf sensor. Replaced that, reset the computer, problem continues. I've wasted over 1000$ with no fix I need help
My car has 140000 miles.
My car has an automatic transmission.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
What others are asking
Car moving from side-to-side when driving
Hello, I'm not quite sure what you mean that it moves side to side. Being that it is affecting the drivability of the vehicle, it should be inspected and repaired sooner that later. You will probably need the aid of...
Car leaking coolant after repair
Hello. If this was fixed recently then you really should take it back to the shop that did the repair. It may be a loose hose or clamp, or it may be something entirely different. I typically locate and fix...
Car stalled while driving
You likely have a crankshaft position sensor issue. Other problems that may exist include a faulty fuel pump or an an occurring vacuum leak. I would have a certified mechanic, such as one from YourMechanic, come to your home or...
Third ignition coil not getting power
Coil packs are usually mounted on an ignition control module that controls the signals for the coil packs to fire. If the coil is good just not working the module may be the problem. Along with the module being tested...
Vibration/Wobble When Accelerating From Low Speeds
When you disconnected the battery all of the computers for the engine and transmission reset back to the factory settings. When you drove for about 20 minutes, the computers relearned there drive conditions and the way you drive. The vibration...
Whistling noise when braking and accelerating
Hello. If the noise occurs when applying the brakes and not moving then you may have a failure in the brake assist. If it only occurs when the vehicle is moving then you may have a failure in one of...
Rear passenger wheel gets very hot. Do you know what it could be?
You will need to lift the wheel (https://www.yourmechanic.com/article/how-to-properly-use-a-floor-jack-and-jack-stands-by-brent-minderler) off the ground and see if the wheel is able to turn freely. If it does not, then the wheel will need to be removed and the caliper bleeder screw opened to...
Smoke coming out of the vents into the cabin compartment.
Hi there. The green ooze that you saw was indeed coolant. The issue could be the heater core hoses or heater control valve is leaking coolant and the ventilation system on your air conditioning system to the open air outside...
I have a Mitsubishi Diamante 2000 LS with 197,450 miles and I'm not sure if my transmission blew or if it's something else.
I would not suspect the transmission is bad just from hitting a bump. It is most likely a wire connection came loose or something else minor. You will need to have the car checked to see what happened by a...
Related articles
How Does an Engine Idle High and Low?
A common problem that car owners experience is high or low engine idle. A damaged intake gasket, cold air intake, or PCV valve can cause idle issues.
A Buyer’s Guide to the 2012 Mercedes-Benz SLK
It’s It’s not a sedan and it’s not quite a sports car, but chances are that brand-loyal fans desiring that luxury-class hard-top convertible with some oomph under the hood won’t care. The SLK roadster boasts three attractive engine options, and...
A Buyer’s Guide to the 2012 Mercedes-Benz E-Class
The The Mercedes-Benz E-Class is a midsize luxury vehicle that has been one of the most popular options for a number of years. The 2012 models, which now include a coupe, a wagon, and a convertible as well as the...
Browse other content
Cities
Maintenance
Services