Re: [ihc] Driveability (Idleability?) Issues

["Allan Ericson" <lowvolt@xxxxxxxxxxxx>]

Jim-

It sounds as though the timing might be changing, as if there is a crack in
the diaphragm that turns on and off the vacuum advance. That's my first
reaction. Try removing the vacuum advance hose from the distributor and
plugging it, and see if the problem goes away. You may get a new problem at
higher rpms (slightly less top end), but that would be my first test.

Did you ever decide to get a unimog?

-Allan
----- Original Message ----- 
From: "Jim Camery" <jcamery@domain.elided>
To: <ihc-digest@domain.elided>
Sent: Friday, September 10, 2004 7:00 AM
Subject: [ihc] Driveability (Idleability?) Issues


> My '67 (?) 1100 with a 345 and a Holley 4150 has developed drivability
> issues.  It'd developed a surge at idle where it will rev from about 700
> rpms to about 1300 (or higher), on about a two-second cycle.  Waiting at a
> stoplight, it will gallup up and down like I'm taunting the car next to me
> to race.  Some other details:
>
>  * Has mechanical fuel pump
>
>  * Has 727 auto.  Kickdown thing has never been hooked up.
>
>  * Truck has mechanical pump yet
>
>  * Problem gets much worse as engine warms up
>
>  * No apparent surging if I open the throttle a bit off idle.
>
> I haven't put any scopes or meters to it yet.  Where should I start?
>
> Jim Camery