That's exactly why it died on you (after closing up the vacuum leak).
It was running too lean as is and the computer was compensating by adding
fuel and (just about) closing the IAC port (via the solenoid). Once you
plugged the hole, you introduced a rich condition and the computer took a
little bit longer to adjust. That happens...no biggie.
That would probably be the best step since who knows how long it was driven
without the cap (long term fuel trim was more than likely affected by this).
Reset the PCM after replacing the vacuum cap.
- Bernd
-----Original Message-----
From: owner-dakota-truck@buffnet.net
Subject: DML: Vacuum leak - Missing Cap - V6
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--
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:00:06 EDT