While your checking things, dont forget to check the timing chain! The way
the symptom changes sounds like how timing will bounce all around with a
loose chain. Easily checked by popping the distributor cap and turning the
motor by hand one way, then the other. There should be almost no hesitation
at the rotor when reverse direction at the crank. If there is much more than
a quarter of an inch of slack at the damper before the distributor rotor
reverses directions, odds are your chain is loose and stretched, or in some
cases the nylon has came off the teeth. This will require dropping the pan
and cleaning the pickup, luckily not that big of a job on a Mopar big block
thanks to it's flat flange construction.
Phil <><
----- Original Message -----
From: "Bruce Stubblefield" <audiblefeast@xxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Tuesday, December 30, 2003 5:56 PM
Subject: IML: 78 NYB STILL ROUGH RUNNING
> The car randomly and
> sporadically loses power and/or knocks terribly at 50
> to 70 mph, then after a few seconds or after I back
> off the gas and step back on it, power returns to
> normal and knocking stops. I'm not talking about
> knocking on hard acceleration, which it normally
> doensn't do. Also, at low speed coasting, hitting the
> gas occasionally causes a popping out the intake of
> the carb. Sometimes is blows off the air intake hose
> attached to the horn of the air cleaner assembly.
Back to the Home of the Forward Look Network