Solving the mystery of my engine madness

9th March 2007
The day had started badly with my engine valve re-tune not fully riding me of the problems of backfiring and popping that I had been plagued with since fitting the twin Weber 40IDF carburetors.

I was sure that there had to be a reason for the engine noises as the engine seemed to run much better when it was stationary. There had to be a loose component or something that was failing during acceleration. I considered the electrical system and was sure that the ignition system was solid as had already checked this out when I fitted the new spark plugs.

If the ignition system was OK this only left the fuel system. One possibility was that the fuel fuel reservoirs in the carburetter float chambers was not full enough and was moving whilst the car was accelerating. The problem with this was that I had already had the float levels set up by a specialist and new they where correct.

After eliminating everything else I was left with the fuel regulator which regulated the fuel supply to 4 psi. I removed the regulator from the fuel system fuel lines and tried again , giving the car a short run. To my amazement the problem had disappeared. It seems that my corroboration problems had been plagued by a bad regulator that I had bought from eBay. I was not sure if it was my mounting or adjustment as the regulator had no gauge. Either way my buggy sounding more like it should.