re spluttering when cold, thats generally a good sign. It suggests the idles are providing about the right mixture. Im assuming the cabrs dont use the manual cold start chokes. Therefore if your idle jets are close to being correct it should splutter a bit when cold as the mixture will be a bit lean. As soon as the engine warms up the mixture is correct and the spluttering goes.
Popping when slowing down could be an tiny air leak, or running slightly lean or rich. Is the popping coming from the exhaust or carbs ?
Trickling sound isnt good. It could be too things i can think of right now. One the engine is that hot after a run that its boiling the fuel in the bowls. Or 2nd the floats are not set correct or you have a bit of dirt in your fuel cut off valve.
Too hot an engine, hold your dipstick if it burn your fingers its running too hot and could be boiling the fuel.
RE floats or fuel cut off. run the engine at idle, get someone to shut it off. Get it to make the trickling sounds. Have the air filters off ready. Hold a mirror above the carb and position it so you can see down the barrel. You may need a torch. Can you see fuel tricking into the carbs after the engine is switched off? if so its your float height, dirt in the fuel cut of valve or a damaged float.
If the trickling sound is fuel leaking down the barrel this could be causing the poppping at low speeds if its popping out the exhaust.
You need to fix the trickling before you get it rolling roaded.
Hope this helps
Cheers Mick
MMMC said:
Sounds cool - thanks for that. Shame you don't have the ict jets.
The carbs are on and working. The guy who did it for me did a great job but did say to get the best performance I need a rolling road. They seem to run well - a bit of a cough and splutter when they are cold but generally good. They've been on a few weeks and feel a bit different to when they first went on - coasting seem to make it pop a bit.
The one odd thing thats happening is a trickling sound coming from the carb when the engine is switched off after a run - its really hard to describe the sound...wasn't sure whether it was a build of air pressure?? Any clues?