If the pipe is "loose" then it may not be sealing at the "o" ring. If the cold start valve is "loose" too that is another source of a vacuum leak. ANY vacuum leak is bad, it reduces the ability of the ISM to control the air going into the motor and leans the mixture measured by the air sensor plate. To fix these leaks you will remove the intake. I fixed a Delorean that had a loping idle, the brass ring was hanging on the air pipe along with the "O" ring. As soon as it was fixed the idle impoved dramatically. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "Dave Swingle" <swingle@xxxx> wrote: > The pipe goes into a hole in the bottom of the fuel dist housing. It > has an o-ring that creates the seal. If the pipe is not completely in > the hole and/or the o-ring is missing or dislodged, the car will run > horribly or not at all due to the huge vacuum leak. > > Same for the other one. Unfortunatly you need to remove the intake to