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In all my years of working on cars I must admit I never thought I'd hear
my self say "it goes too fast"....... But the boost gauge on my 87
5KCSTQ always used to go up to 1.2. Now all of a sudden it goes right up
to where the fuel pump cut off kicks in and kills it. I saw 1.8 but only
for a second. It pulls like the proverbial freight train. I've been
driving it around using the throttle judiciously. I checked all of the
vacuum/pressure hoses and could find no leaks. I am unclear as to how
the wastegate frequency valve is supposed to work but it does read the
kind of signal I would expect to get across a frequency valve. Is it
supposed to click/ whirr like a an idle air compensator ie. all the time?
Could a faulty wastegate frequency valve cause this symptom? Or should
I just take the wastegate apart? The only wastegate I ever saw hang up
stuck open and I'm having a hard time convincing myself that it would
stick closed. Anybody got any good suggestions before I go have at it
with the Snap-Ons?
Thanks Steve Foster
P.S. After I get this fixed I was planning on vacuuming out the dog
hair and putting it up for sale. Gotta make room for the new/old 928.
The '87 5KCSTQ will go down the road for $3,500 if anybody is
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