Found hesitation problem-I think!

[91zr1]

I was just about to take the car to get it diagnosed when
I thought I would check some of the vacuum line connections
that I could without removing the plenum.I discovered that
the vacuum line connection on the very rear of the plenum,
the one with the metal plate over the connector,was not
making a tightly sealed connection.It seems the rubber seal
on the bigger vacuum line has come off and the smaller vacuum
line is loose inside the bigger line.Could that be the problem?
I tried to seal the connection with some electrical tape for
the time being and it did not hesitate like it has before or
idle badly.I had 1 or 2 moments where I got a almost un-noticeable hesitation or lag,but certainly not as bad as was
the case.My question is this-what could I use to seal this
vacumm connection or do I need to just go buy another
big rubber boot that the small line connects to.And can you
buy just that 1 piece of hose? I hope I have found the problem.
Thank's
STeve
91zr1

 

[Aaron71771]

That would be your MAP sensor and yes, a leak there would cause a problem. All sorts of problems actually.

 

[secondchance]

When I pulled the intake plenum last year, I found similar condition at a lot of two piece connections. This particular vacuum lines were only 18 months old. So rather than buying a new piece which I figured would degenerate, I mixed a batch of 2 part epoxy and applied a small amount on the hard plastic tube and worked it into the soft rubber part. then, where possible, tied the soft rubber portion with a miniture plastic tie. To be on the safe side, I applied more epoxy around the joint between soft and hard plastic tube. So far its holding good.
Even if you install a new vacuum line, I would sugget going over these joints with epoxy. Seems heat separates these joints rather quickly even with new lines.