99 A CLass WONT REV OVER 4THOUSAND REVS

[horgantrevor]

I Have A 99 A Class That Wont Rev Over 4 Thousand Revs Any Ideas Pls

 

[horgantrevor]

ITS OK I THINK I FOUND THE PROD LETS HOPE SP



This small sample 3 is typical of the oil/water brown emulsion that can be found in the neck of the oil filler and also the crankcase breather pipe, more often than not caused by too many short runs where the engine is not able to reach its full operating temperature. Where this is a particular problem it is advisable to use engine flush prior to replacing the engine oil. The example in this photograph is nothing to worry about, although it was causing the owner some concern. I have seen much worse, a good long run and an oil change will normally deal with the problem.
In any circumstances if the oil is changed at the prescribed intervals , not more than twelve months there will be no problem,
Do not confuse this problem with a leaking head gasket unless you are having to regularly top up the coolant header tank with fluid.

 

[jberks]

Sorry - I don't understand. Are you saying that it won't rev because it needs an oil change - doubtful. Also, you are aware that most mercs, autos anyway, have a lower rev limit in neutral.

 

[horgantrevor]

NO BUT I CHECKED THIS PAGE AND IT SHOWS http://www.aclassinfo.co.uk/mypage.38.htm

The prob is that for some reason the car which is a manual will not rev over 4 thousand revs the wife said it happened a week or so ago but only tells me now

 

[Parrot of Doom]

Don't think it will go over 4k rpm in neutral anyway tbh.

 

[horgantrevor]

i may be a fool but yes i did check in neutral

i hope thats it but after some reading and now finding out the car is over due a good service which i will do tomorrow . im going to do a oil flush too just to be sure

thanks for the help