Can't seem to figure this one out.
I have a totally stock 1980 with 37k that has a slight spiff that happens religiously between 3k & 3200 rpm.
It's not constant but close to it.
A bit Less when warmed up.
It does not matter what speed or gear I'm in.
If I play with the throttle between say 2900 and 3400 rpms I can make it occur.
Seems to be coming from the carbs.
It's not a full fledged back fire but a small annoying spiff. And it sounds just like that...Spiff!
I'm not sure if I should be looking at vacuum, spark or carburetors ?
I just started adding mmo to the gas...?
Any Ideas
I have a totally stock 1980 with 37k that has a slight spiff that happens religiously between 3k & 3200 rpm.
It's not constant but close to it.
A bit Less when warmed up.
It does not matter what speed or gear I'm in.
If I play with the throttle between say 2900 and 3400 rpms I can make it occur.
Seems to be coming from the carbs.
It's not a full fledged back fire but a small annoying spiff. And it sounds just like that...Spiff!
I'm not sure if I should be looking at vacuum, spark or carburetors ?
I just started adding mmo to the gas...?
Any Ideas