Fooling yourself, not the ECU

[quk@isham-research.demon.co.uk (Phil Payne)]

I don't know if I posted this incident.  I had another MB turn up at
the house last Thursday with a complaint that it wasn't "quite right".

True, but it also wasn't bad.  WOT working properly, boost within
tolerance, good fuel, plugs OK, etc.

Did quite extensive diagnostics and came up empty until I checked
the ISV current - zero milliamps!  Started fiddling around, and the
owner suddenly blurted out that the ISV was defective (I suspect
damaged by very clumsy cleaning) and had been "replaced" by a
constrictor in the hose.  I pulled the hose off and extracted a 7/16ths
1/4" drive socket with a piece of rubber hose jammed in the middle.

Just because it works at idle doesn't mean ...

Oh - I give up!

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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