[Spridgets] Running rough

Robert Weeks lists at woozy.com
Sun Oct 23 16:18:10 MDT 2011


Thanks Bill and everyone else who offered suggestions. I didn't get a 
chance to work on the car again until this weekend and I had to fit that 
in around my son's hockey games, so I'm a little late getting back to 
every one on this.

The car is running a little better now but I still have a problem with 
it. I got the carbs balanced and it appears the mixture is either very 
close or right judging from the color of the spark plug tips. I replaced 
all the the rubber gas line, gas filter and clamps, there are no leaks.

When driving the car it pulls strong in first and second gear through 
5500 rpm but when I shift into third it starts to sputter around 2500 - 
3000 rpm. Pressing on the gas makes it worse. It seems to clear up if I 
let off the gas for a bit. Once I let off the gas for 10 or so seconds I 
can give it gas and it will run smoothly up to 5500.  It does this 
consistently.

This is a strange problem that I haven't run into before. The 
distributor is new and I have a Crane XR700 fireball ignition. The fuel 
pump is a new aftermarket fuel pump which I bought from NAPA (Airtex 
E8016S). NAPA has this listed as the correct replacement pump. Advance 
Auto lists the Airtex E8128 which pumps at 4 - 6 psi vs. 2.5 - 4.5 psi 
for the one I have. Has anyone else run into this problem before?

Any ideas on how to fix this will be appreciated.

Thanks,

Robert

On 10/15/2011 4:36 PM, corvallis at peoplepc.com wrote:
> Distributor advance isn't right; maybe an air leak below 1000rpm?
>
> Balancing SU carbs...billie bob method: Once you rule out air leaks . . .
> 1.  warm up engine
> 2.  Screw up mixture nuts all the way and then down 2 turns.
>        up = leaner, down = richer. (this is the nut at the bottom of the


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