Vacuum leak?

On 12/2/02 6:02 AM, "Tom" <tomsalicos@ATTBI.COM> wrote:

> Just returned from a round trip from Portland, Oregon to near San Diego
> California.  Down was totally uneventful.  About halfway back, I noticed a
> hesitation after briefly coasting, then re-accelerating.  This continued and
> got worse until it hesitated badly any time I backed off the accelerator.  The
> hesitation was like suddenly it just had no power.  If I went directly from
> coasting to "flooring it", there was no hesitation.  Being Sunday morning and
> needing to be back for Monday, I continued to drive it.  Great if I could
> drive at 80, but really crappy when I had to slow down.  Glad I did not have
> to explain to a Hiway Patrol:  "You see, officer, I can't stop accelerating or
> it will not run right".
>
> I pulled off when it got bad, let it cool down then continued.  Wound up
> stopping every hour or so.  Late in the trip, having the hesitation episode,
> but going down a hill, I turned the ignition off for 5 seconds, then restarted
> it.  Hesitation *mostly* gone, but coming back after half an hour or so.
>
> The van is an '87 2.1 without the capacitor or *harness* fix.  Engine has
> about 30k miles on a rebuild, new-ish oxygen sensor, Temp2 sensor and runs
> flawlessly most of the time.
>
> Isn't there a circuit to cut the fuel supply on deceleration?  Could this be
> malfunctioning?  Where would one look if so?
>
> Of course, the problem went completely away when I got to about 100 miles from
> home.
>
> Thanks for any input.
>
> Tom Salicos
> '87 Syncro Westy
>