Info needed: JXD versus JXLD

[Mike K]

Originally Posted by Big D

I have now got the engine running reasonably stable and it idles happily. I feel the mixture is still too rich though and the engine has a stumble just off idle when blipping the throttle. There is also some intermittent popping in the exhaust.
Do any of the resident JXD experts have any bright ideas on the JXLD and what the problem might be?
Any thoughts would be appreciated.

Have you looked at the spark plug colour ? If the engine is running slightly rich as you suspect, the plugs will be dark grey or a dark brown colour.

Old carbies ( even NOS ) can often suffer from leaky dried out gaskets, this can be a cause of air or fuel leaks within the carby passages.

As a experiment: If you have a Holden Stromberg carby around, give it a try and see if the engine runs better , you will then know if the problem is the original carby or something else.