Violent Cutoff (I mean really violent)

[Phil Rose]

At 4:34 PM -0400 5/14/05, Kneale Brownson wrote:
>I replaced the wastegate solenoid that I thought was preventing me from
>getting more than 1.3  bar  with a used one supplied kindly by Ingo.
>Started out the driveway with an eye on the gauge and saw 1.8 just before
>the car jerked violently.  Felt like I ran into a wall.  I thought I'd
>maybe hit the rev limiter, but when I've hit that in the past, power just
>disappeared.  This felt like I hit the brakes as hard as I could.
>
>Here's the old solenoid with a bunch of cracks in its plastic and the
>pretty patina of corroded copper winking through:
>http://www.pbase.com/kneale_brownson/image/43360819

Whoa! That is one sh!tty looking WGFV. I can't imagine it's worked 
for some years now.

>Ingo's solenoid was different in that the tab that's supposed to fit into a
>slot in the rubber hose from the air cleaner box (see the arrow in the
>image)  is 90 degrees farther around the assembly.  In other words, instead
>of being 90 degrees from the electric connector, like on the one I took
>out, Ingo's is 189 degrees from the connector.  Could this indicate that
>the solenoid is not correct for this car?  Could that be causing the
>violent cutoff?

The only violent cut-off that I've experienced has been caused by a 
loose hose clamp "burping". Since you had just finished loosening and 
retightening a bunch of clamps, I'd suspect a loose one could be your 
problem. As to Ingo's WGFV--I guess it's possible it might be a kind 
of valve designed to operate in reverse of normal (i.e., valve closed 
when no signal applied rather than being open). That would lead to 
excessive boost (and cutoff).

Phil

-- 

Phil Rose
Rochester, NY
mailto:pjrose at frontiernet.net