Quote:
Originally Posted by Fernandez  The Independent Specialist I took the car to can't find anything wrong at all  . Since there is plenty of unburnt fuel he reckons the problem must be related to ignition rather than fuel supply. He said the crank position sensor could be showing an intermitent fault but he can't be sure and I am reluctant to start putting new parts without evidence of them being faulty. He could not find any stored codes.
I am increasingly concerned as repeated failure to start could ruin the very expensive cat 
In other words: HELP!
Thank you in advance |
RUN, DON't WALK TO ANOTHER SPECIALIST OR TAKE IT TO A MERC DEALER
The crank position sensor can be check with an ohm meter and an oscilliscope.
He must be seeing your "symptoms", but gives you a "nothing wrong" answer because his ability to diagnose is limited !!!
The next specialist needs to check/diagnose everything from the O2 loop to the starting cycle, complete fuel supply and ignition system before he starts to replace what will be expensive parts.
You don't need a specialist who replaces parts one by one to see if it corrects the problem !!!
Good Luck