CLK 430 loss of power when hot
 

Hi guys,
my cLK 430 with 160.00 miles sems to heve problem when the engine becomes hot........i mean, when the outside temperature is warm , the engine is about 95 C aftre i while i can see that i have to press more the accelerator than when the weather is cold.
Exemple when i go on a hill with the gear blocked in 3 and engine at 2.000 i cna feel tha the engine becomes leazy.
May be is also due to the fan cluch thant engages but i do not know why eftre 3500.. rpm i can really feel that something changes...
The MAF is new and spark plugs and air filter also.
Many thanks
Alberto :)

Could be the CPS (crank position sensor). They fail when hot and do not usually leave a fault code. Just my 2 cents. ;)

interesting
 

Very intersting in fact i do not have any code ....can i test these r i have to buy a new one?
I was thinking also about the HOT air in the intake due the position of air filter, The MAF has a system to mesur the temperature and if the aisr is too hot retard the timing.............i was thinking to modify my old MAF with a fixed resistance in this way the ECU will think all the time that the temperature is 20 or 25 dgree............but i do not know jet...
What do you think?

See http://www.peachparts.com/shopforum/ml-gl-g-wagen-r-class-unimog-sprinter/121528-testing-cps.html?highlight=CPS ;)

Also see http://www.peachparts.com/shopforum/ml-gl-g-wagen-r-class-unimog-sprinter/102905-crankshaft-position-sensor-diy.html for DIY. ;)

I will do
 

Thanks a lot :) :sun_smile