Norm Peterson

I'm thinking air:fuel mixture rather than timing. Any chance the carb hold-down nuts are a little loose (particularly the rear two)?


(Your description sounds a lot like the problem I had many years ago with a car that would stumble and eventually threatened to cut out when turning one way but was fine going the other, just that yours is in a 90° different direction. Turned out the carb was loose, and the engine sucked unmetered air going one way but not the other or during either forward acceleration or straight line braking.)


Norm

kalli

good point. I think on the werekend I'll have plenty of spare time. Will shove the lambda up her **** and see what happens. ten I'll know for a fact it it's mixture or timing

Gun Jam

but dont all manual cars surge or buck like that when you get the RPM too low? Mine does the same thing in parking lots when RPM is under a 1000. A little clutch and a bit of power is the quickest way to stop it from doing that. Adding power alone if not totally smooth and in the right amounts seems to compound the problem momentarily.

kalli

not with the stock 289, but I guess a bit of cam and you run into problems like that.
I changed to manifold vacuum, with the lowest setting (slowest curve). Seems better, but the starter doesn't like it when engine is hot

Gun Jam

my 1976 volvo would do the same thing at about the same speed...I always just figured it was normal...