Condition recurres after 5 / 20 cycles - 8 to 150 miles.
Ecm resets correctly (Clears codes)
Several techs / shops independently come back with same condition - ecm fails to supply ground for EGR circuit - they think ecm is trash (and yet it resets and works (for a while).
Done to date:
2nd ECM - same condition
reinstalled original ECM - same condition
replaced EGR solenoid - same condition
Any guidance would be appreciated
Thanks in advance
P.

 

Did you clean out both the intake and exhaust side of the EGR ports?

 

No, not yet. I've got all manner of people yelling ECM's, Lift sensors and EGR control solenoid but I'm not convinced yet.
The thing is, I'm exibiting some of the symptoms of the carbon build-up problem: a surge / chuggle (feels like one cylinder drops out under light load at / around 2000 rpm - right where the EGR starts working).

P

 

Clean out the EGR port in the head and the IM. You will need to take the intake mani off of the car to clean it right.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by P_Adams &raquo;</TD></TR><TR><TD CLASS="quote">No, not yet. I've got all manner of people yelling ECM's, Lift sensors and EGR control solenoid but I'm not convinced yet.
The thing is, I'm exibiting some of the symptoms of the carbon build-up problem: a surge / chuggle (feels like one cylinder drops out under light load at / around 2000 rpm - right where the EGR starts working).

P</TD></TR></TABLE>
DUDE, I work at a dealer and see this problem all the time. We ussualy clean out the intake manifold and replace the egr valve with a new one. I belive they have a kit that comes with a new valve and several gaskets. You have to clean it out pretty well or the light will keep coming on.