Hi

My 1984 300SD is becomming a gas guzzler i calculated and i am getting about 11 to 17 miles to a gallon!!!! could it be that its running too rich or dose it need a valve adjustment or is it something else.

Thx

 

I vd check and i have not found any leaks and there is no smell.

 

Adjustment,or aircleaner,leaky injectors,dirty clogged bango bolt for ADLA.Binding brakes are common too.My SD gets 38 hwy,up to 50 mpg around town.

 

It had been a while since the fuel filters were changed on my 90 300D. Went from 25 to 32mpg.

 

Do you have a locking gas lid? Make sure it locks.

Put paper under the car, front and back. I suspect the fuel lines under the tank or the injector return lines are leaking badly.

 

Assuming there is no theft and no leaks and the car is running normally, then watch the odometer. It's probably not tracking mileage correctly. I havehad them stop working for weeks and then come back to life but the recording was never correct.

 

hi i already reslove my toubled gas milage, Valve adjustment, and serious amount to purging thx for the help

 

Were the valves tight or loose? Was it intake or exhaust?

 

not sure i send it to mech and he did not said anythingor describeabout thoses valves.....