Thread: Series IIA engine problem

Sounds like a fuel delivery problem, who rekitted the carbie and was it tuned to the vehicle. Or opposite has the rekitted carby found a tuning problem on your car.

Fuel pump or vacume advance would be worth looking at.

Sounds like a timing issue caused by either dodgey vacuum advance or spring weights (have they seized) or both in the distributor.

Gazzz

Possibly running too lean, suffering lean burn miss / backfire.

It does sound like an ignition issue to me. Stupic question but did you replace all the plugs along with the other ignition components?

Im with Big John
Running lean.
Possible that the carby gasket is leaking,or even the nuts on the carby come loose(MY BET!!!!!).Been there done that with the same carby conversion!!!!
A good way to check for leaky gaskets is get a can of CRC type stuff with that little tube they supply.With the engine ideling spray along the gaskets,if the revs pick up youve located the leak.
Let us know what you find.
Goodluck
Andrew

I see three possibilities:-

1. (Most likely) Fuel restriction, either a fuel pump fault, a partial blockage on the suction line such as the screen in the tank, or an air leak somewhere in the suction line.

2. Ignition - in view of what you have done, have you rechecked the points gap - I have seen this when the points close up, possibly also wear on the shaft bearings. Could also be incorrect timing due to the vacuum advance not working or the centrifugal advance seized or otherwise not working. Could also be a sick coil, or bad connection somewhere, a prime candidate being the internal earth wire between the contact breaker and the distributor body - if it is broken but making contact until the vacuum advance is in a certain position, this could account for the symptoms.

3. Air leak somewhere into the inlet manifold as suggested.

G'Day Guys,
Thanks for all the good advice, will start working my way through the things people have suggested this weekend. One other thing I wanted to mention was that when I was replacing the 'points', I took out the base plate of the dizzy because the whole inside of the dizzy was covered in 38 years of crap. When I put it back in I noticed the there was a small pin on the underside of the base plate that was supposed to fit in an eyelet (which is attached to the vacuum advance shaft thingy???) and I reckon I didn't get the pin back into the eyelet... Could this prevent the vacuum advance from working and therefore retard the engine??

timbo