rough running

[Woodie]

Ok yesterday I installed rebuilt carbs they were running on a different car. I made no adjustments. I am driving with gas (over 1/2 tank of 91 octane) from last november. I used Stabil to keep it "good". This morning car was very difficult to start and ran rough until well warmed. Needed lots of choke. I do not want to adjust the carbs until new fresh gas is in the tank. Until then would adding some Octane boost improve things ? I have no easy way of draining the tank other than using the gas.

 

[Trevor Jessie]

I'd fill it up, drive it home and adjust the carbs the best you can. Then recheck them after the next fill up.

 

[Woodie]

Trevor, I went out at noon, car was hard to start again. I think I have the chokecable to loose and am not dropping the choke enough, I only had a screw driver with me at lunchtime. After I got the car warmed up, when I pulled on the throttle cable it back fired through the front carb a fair bit. I could hear the air being sucked in really well through the cone K&N's, so I guessed at lean, and went down 2 flats on both carbs to richen them up a bit. BOOM no more back fire, no hestitation. I went and filled up with 94 octane, and she rides real nice. When I get home I will tighten up the choke cable a bit so that when I pull it out it drops the jets completely not 2/3rds of the way. I will also get out my colour tune and check the ignition flame. Once all that is good, then on to the pertronix ignition this weekend..

Thanks for your help.

 

[Woodie]

Ok I got home and the wife gave me a present..time to work on the midget. I changed the ignition over to pertronix, car starts and runs fine but did not do timing. Ran out of time.

The one things i noticed is the idle. I varies from 1000 to about 600 maybe 700. It is not steady. I checked for vacuum leaks and all is tight. and no signs of leaks. SO what causes idle to vary like that and if the timing is off a bit does that cause it. The timing was set at 10BTDC when I put the car away in Nov. to try to make start up in spring easier.

 

[Trevor Jessie]

unbalanced carbs.

 

[Woodie]

at Idle that would be that noticeable? Arn'et the pistons down and basically sitting and not moving?

 

[Trevor Jessie]

Unbalanced carbs as in the butterflies are not open the same amount. Do you use a unisys flow meter or do it by tube in the ear?

 

[Woodie]

tube in the ear, but have not done that with these carbs, as they were "balanced and running" on the PO' s car before selling them to me.

I know what I'll be doing on saturday.