W202 idle on crusing

[c200Kompressor]

Hello! My W202 as developed a strange thing: let's say i'm driving on 4 gear (manual) and put on N the idle gets to 1000 rpms and then runs up to 1550 and stay there till i put a gear or after ~2 minutes of idle...

 

[Adam230K]

throttle spring if its not a V6

 

[c200Kompressor]

Thank's! No! Its a 4 "in line" . And as a simple solution or do i have to change the trotle body?

 

[Adam230K]

Nope just the throttle spring, which u can get from the dealer for cheap.

 

[c200Kompressor]

Hello! I went do the dealership today and the show me (on the computer) that the spring wasnt sold apart! I have to buy the trothelbody... Another thing: the problem only happends when the engine is hot and the car is on the move. I tried with the car stoped and nothing... The rev goes up and down normally!!!

 

[c200Kompressor]

No one???

 

[andy27168]

Hi,
On my 1997 (build date 96) W202 C230 kompressor the throttle spring snapped, and i had no problem getting a replacement from MB, but mine was a preface lift car with a mechanical throttle. If yours is a post 97 model i believe it will have a electrically operated throttle so that might be the reason why.
But i do have my doubts that is your problem.

 

[c200Kompressor]

My car is from April 1997. One question: does the accelaration module has to be "programed"?

 

[c200Kompressor]

Hello! another thing: yesterday i disconnect the baterry for 30 minutes. Go for a drive and the car run run normally. Today put it to work and the problem came back!!!

 

[Adam230K]

Yours might be an electronic throttle then... and by disconnecting the battery you reset it. If the problem still came back then you might have another problem...

 

[c200Kompressor]

Hello! I went to a dealer and came with a lambda sensor problem. Buy a Bosch unit anda the problem is still there!!!

 

[c200Kompressor]

Hello! I did a little experience: change the MAF. The idle problem is solved! But NOW i have a new problem: when the car is in N and do a hard accelaration the engine look like a boxer one. If i do a gentel accelaration the engine revs normally...
PS: I miss my JAP'S...

 

[c200Kompressor]

News: i went to a Bosch dealer and came out with 6 erros. The guy didnt new that my car is running on LPG. At first he said that i had a leak on the intake manifold or anything related... Then i said that the car is running on LPG he said that i had a problem with the spark plugs. Recomend to change to a set of Bosch LPG...

 

[c200Kompressor]

Hello! As my car is running on LPG i went to the guy that install the sytem. Explain the problem of the car and he connect the laptop to the car. Go for a drive a the result was a very poor calibration on the injeccion (40% less than normal). Run the car for aroud 100 km abd so far is normall (idle inc.)

 

[c200Kompressor]

Problem solved: new MAF!!!

 

[c200Kompressor]

Jesus! WTF!!!! Now I have a new problem: when the car is on petrol until it get's to 2800 rpm´s shakes like a drum!!!! After it pass that marc runs fine. On LPG work normally .

 

[c200Kompressor]

No one???

 

[c200Kompressor]

Came from a friend of mine with this:
a) P0300;
b) P0301;
c) P0209.
Mercedes rules right?

 

[c200Kompressor]

Put "new" injectors" but the problem is still there!!!
Now i have a P08... Gear box sensor!!!

 

[NW_Merc]

Nope just the throttle spring, which u can get from the dealer for cheap.

What's the part number as I think mine may well need replacing