Sprite misses during acceleration

[RTew]

We have a 1962 Austin Healey Sprite that is having trouble during acceleration. If i go very easy on the gas it works fine but, bogs or misses when giving too much throttle. It also appears to be using a lot of fuel.

Any suggestion on where to look??
It idles fine and runs fine once at speed

 

[Billm]

Sounds like you have either no oil or too thin oil in your dashpots (top of the carbs).
I normally use 20 or 30 weight oil (or similar)
BillM

 

[Boink]

Gosh, many possibilities. Is this a new thing? How does it drive under serious load (not necessarily accelerating but at high speed or on a hill-climb)? Will it do this under no load (just high revs but in neutral)? Any recent changes in the engine (with work done)?

 

[Gerard]

Bill's suggestion is the first thing I would check. After that, many other possibilities, including jet adjustment/balance, float levels and fuel pressure. Remember that electrical problems often mimic fuel issues.

 

[RTew]

I will try the Oil tonignt and this seems to be a new issue. Once you are up to speed it runs great and it idles great.

 

[Trevor Jessie]

It would also be helpful if we knew if the car is totally stock, or has the carb/ignition been changed from original.

 

[tomshobby]

One of our local LBC club members had a problem like this. Turned out to be the tab on the points breaker arm was badly worn due to lack of lube when he changed them.

New points and a dab of lube solved it.

 

[Guest]

Choke hung?