12-03-2019, 07:00 PM
Hi all,
Interesting problem. My special has developed a miss and blowback through the carb (1.25" SU) under very certain conditions. If I'm travelling uphill, in 4th at full throttle the engine will begin to miss and blowback repeatedly through the carb until I stop and start again. If I take the same hill easy, at half throttle, it will travel up it without fault.
It idles fine, and runs well under all other conditions, and can pull 4th on the level, it's just when it gets load in 4th at full throttle uphill that it falters. It performs faultlessly at full chat in 1st on a trials hill. It's getting annoying between sections though!
I've a new fuel pump on the way as I'm not certain it isn't just running out of fuel under those conditions, but I'd be interested to know on other people's thoughts. Has anyone had similar symptoms?
Interesting problem. My special has developed a miss and blowback through the carb (1.25" SU) under very certain conditions. If I'm travelling uphill, in 4th at full throttle the engine will begin to miss and blowback repeatedly through the carb until I stop and start again. If I take the same hill easy, at half throttle, it will travel up it without fault.
It idles fine, and runs well under all other conditions, and can pull 4th on the level, it's just when it gets load in 4th at full throttle uphill that it falters. It performs faultlessly at full chat in 1st on a trials hill. It's getting annoying between sections though!
I've a new fuel pump on the way as I'm not certain it isn't just running out of fuel under those conditions, but I'd be interested to know on other people's thoughts. Has anyone had similar symptoms?