Pre '79ers...I've discovered something!

[wubie317]

Perhaps y'all knew this, but if you did, you forgot to tell me.

Been struggling with rough idle and stumbles on acceleration from stop. Messing with timing, idle screw, dizzy, carb...everything I could think of...did nothing. Today, on a hunch, I removed the distributor cap and rotor, and took a peek at the mechanical advance. All looked fine except one of the springs looked a little stretched.

I unhooked one side, twisted the loop clockwise with needle nose pliers and rehooked it, making it slightly less stretched.

Had to retime it, but wow.

My poor little '77 hasn't run this well in a year or more.

[18Fiatsandcounting]

You're right Wubie, I did forget to tell you! But thanks!

Another symptom of this is when the timing marks bounce around at idle when you measure with a timing light. The timing should be fairly stable until 1200 or 1500 rpm or so.

-Bryan

[bobplyler]

79 and later also have the advance spring. Just no points.

[bobplyler]

double post