View Single Post
  #12  
Old 07-18-2005, 09:10 AM
mplafleur's Avatar
mplafleur mplafleur is offline
User Friendly
 
Join Date: Sep 2001
Location: Lathrup Village, Michigan
Posts: 2,939
Quote:
Originally Posted by Gilly
I don't believe the engine control unit has a part in this, no. I'd have to look it up, but I believe it just works off the AAM with no input from the engine control unit. I'll try to find info on this later, it'd help if I had access to WIS, but I don't.

Gilly
I believe the determining factor in which part has failed is if there is spark or not. The ECU controls the fuel pump and turns it on if it senses crank. If the CPS has failed, the engine will crank but produce no spark or fuel.

Spark but no fuel = fuel pump failure

No spar and no fuel = CPS failure

Correct me if I'm wrong.
__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

Reply With Quote