[Mgs] cruise control

[Charley & Peggy Robinson]

Sounds to me that when it's idling, the engine is running on the front 
carb only.  At higher RPM it's running on the front carb mostly. IOW, 
the carbs aren't synched.  That bouncing up and down of the front piston 
in time with the misfire is caused by the difference of the air draw as 
the engine RPM varies in time with the miss.   The TC owner has to make 
sure the ignition is working right & the valves are adjusted correctly 
before trying to adjust the carbs.

CR
On 4/15/2014 3:37 AM, Mark J Bradakis wrote:
>
>  I was working on a car today, an MG TC. The owner said he rebuilt the 
> front carb.  I removed the back
> carb, cleaned it up, etc. and put it back on the car. The car had been 
> running poorly. One could raise the piston in
> the back carb all the way and the idle would not change. Suspicious. 
> That cleaning up did not help with the poor running.
> But I did notice that with the RPM around 2000 - 2500 the piston in 
> the rear carb was rock steady, but the piston in the
> front carb would bounce up and down a bit in time with the misfires.
>
> Must be the ignition.
>
> mjb.
> _______________________________________________