[Gmecm] Re: Gmecm Digest, Vol 23, Issue 28

[Cowen]

Can you trigger the solenoid manually, to confirm it
works?  That would help rule out the ECM (I know
you've tested for resistance etc, but what the heck).

Is it stuck open, or closed?  In either case, is there
an engine condition that would cause this (such as say
high coolant temp, loss of ignition signal, I don't
know??).  Look for a circuit that's actually supposed
to lock out the solenoid, and if it exists, find out 
if/why it's been triggered.

Any  chance the wastegate itself is mechanically
stuck?  Excess carbon buildup, corrosion, broken
return spring, gate is loose on shaft (causing binding
in bore)?

I didn't know they made a 3.1 with turbo.  Is that the
DOHC 3.1?

Duncan

> I have a problem with a 1990 grand prix ste. The
> wastegate solenoid 
> won't operate. Its grounded by terminal a 18. The
> tests say it's a bad 
> ecm but ive tried  6 different ecms and 2 proms. 
> What could possibly 
> cause this besides a bad Quad driver? Tested
> solenoid for low resistance 
> and current draw tested grounds and power feeds to
> ecm. all is ok. When 
> you jump the aldl terminals all the other solenoids
> and relays operate.  


**********************END TRANSMISSION**********************


 
____________________________________________________________________________________
Do you Yahoo!?
Everyone is raving about the all-new Yahoo! Mail beta.
http://new.mail.yahoo.com