Vacuum leak - Missing Cap - V6

From: A. S. (adakota4x4@hotmail.com)
Date: Fri Mar 09 2001 - 13:45:42 EST


Got some news. My old man is looking at buying a 97 dak V6 4x4 SLT
from a relative. He brought it home yesterday and asked me to come
over and give a look. I drove it....sweeeet truck! Got back, put it
in park, and noticed the fluctuating rpm at idle that has been
mentioned here recently. It's only 100-200 rpm fluctution, but enough
to registar on the tach and to be able to hear engine speed changes.
So, with the truck running, I popped the hood to take a look. There
was a fitting just below where the pcv valve hose connects into the
motor that was bare. It's a vacuum leak. I assume this was the place
where a guy on the list mentioned there should be a cap. This must
have fallen off of this truck too. So, I put my finger over the
fitting and the truck instantly stumbles and a few seconds later dies.
Hmmmmm.....
My thoughts.......if there is supposed to be a cap on this thing, why
would it die when I put my finger over it??? The pcv valve is the first
thing in my sight, so I give it a shot in the dark and go buy a new
one. I install the new one and start the truck up. I again put my
finger over the bare fitting (where the cap should be). Again the
truck stumbles, but what do you know....the truck recovers and does not
die! I repeat this twice more with the same results.
Now, I think if I reset the computer, replace the missing cap, and
drive the truck for a couple hundred miles or so, everything will be
fine.
It seems to me that the truck would have been running rich with the
vacuum leak??? Would this be the case? - seems to explain why it died when
I covered the fitting. If so, if I cleaned the TB
good, replaced the spark plugs (and wires too really), this thing
should really haul a$$ AND get better gas mileage.
So, to the guy who first posted the "missing cap" thread, try
replacing your pcv valve along with the cap and see if it cures the
stumble/die problem. Let us know how it turns out too!
--Aaron--
95 DSRC 4x4 V6
www.geocities.com/adakota4x4_95/
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