check engine light turned on after putting gas,then lost power,need help pls!!

Make sure plug wires & coilpacks are healthy if you find random misfires.
Check CPS
Check fuel pressure at the Schrader valve on the front fuel rail. s/b 3.8bar or 55psi while cranking. If not check for clogged filter or lazy fuel pump.
Good luck.


Trending Topics
The Best of Mercedes & AMG
You also need a new crankshaft position sensor.
My mother's ML does the same thing as your car (hesitant to start). It's more frequent at gas stations. The CPS needs to be replaced ASAP.
Last edited by blzdout; May 19, 2014 at 03:56 PM.







