95 c280 stalling and break problems?

[jay_jay_n]

Well i had replaced my maf, plugs, wires , and ignition coils and my car was running great for a few months, sometimes my idle would be low but not enough for the car to die.

Well it happened, everytime i turn on the car it revs up then idles so low it dies emediately. If i rev it high and keep it up i can drive the car, but at everystop it will try to die, also the break pedal is extremely hard now, all of a sudden its really hard to break, the pedal doesn't go down low and it seems like theres a lot of pressure, it feels like when u try to pump the break when the car is off. This all happened the day after it rained so i'm unsure how it could be related. I'm not throwing any codes at the moment as well.

[jnolte]

wire harness?

[Fred Hayward]

Check the Over Voltage Relay; Which controls ,Idle, ABS, & Mixture ; I had the same problem, Now all is sweet !

[junklar]

I think that you need to clean your electronic throttle actuator.. it is located on the right side of your engine when you pop up the hood.. it is connected to the throttle body which is the long black plastic that runs from the MAF and crosses on top of the engine into the throttle actuator.. you can buy a actuator cleaner from autozone.. my car used to idle low as well

don't know anything about the brake issue

[Fred Hayward]

The Relay , also controls the Actuator !

[Len013091]

Check your brake booster vacuum line on the TB, it may have been knocked off and could cause the idle and brake problems.

[jay_jay_n]

thx u guys, where is this relay located? i'm thinking it may be it as well, i really hope its not the wire harness.

[jay_jay_n]

ok i figured out where to find it, is there anyway to test the relay?

[Fred Hayward]

Not realy ! If its the original, replace it !! It will be date stamped.

[JRE320]

Best thing to do is bring it in to a Mercedes shop and let them
figure it out. It's something you can not guess on part should be replace or not.

[Fred Hayward]

Mercedes will replace It !! Anyway !

[jay_jay_n]

well i got a new relay and it didn't change anything :(, and i barely noticed on idle when i try to rev it just to keep the car on it won't go past 4k, any other ideas could it be the crank sensor?, but why would my breaks be having an issues if its the sensor or the vaccum lines?

[JRE320]

Originally posted by jay_jay_n
well i got a new relay and it didn't change anything :(, and i barely noticed on idle when i try to rev it just to keep the car on it won't go past 4k, any other ideas could it be the crank sensor?, but why would my breaks be having an issues if its the sensor or the vaccum lines?

As I said, bring it to a Mercedes shop. Let them figure it out. :rolleyes: No one is a mechanic here. All we can do is provide you suggestions. Maybe this or maybe that.

[junklar]

check the connections to the throttle actuator.. there is supposed to be a vacuum line that goes into that that comes from the front of the motor, under the black mercedes cover.. and i explained the location on my previous post

if that connection is good, then clean the throttle actuator with a 4 dollar spray..

[Fred Hayward]

Do as the Man Says !

[JRE320]

Best thing to do is check you fuel filter.