To be honest everything looked fine, then I took a look at the accelerator jet. ![]() So last night I took the carb back off, split open and went through every jet, removed and cleaned. ![]() The exhaust was blowing, so I removed it and replaced all the snapped and sheared studs ( sounds easy when written in a single sentence, but oh how I laughed whilst doing this job ) I know that poor back pressure can cause issues, but still it hesitated, I replaced the thermostat and housing ( dont even ask about that job ) as it was stuck open so it took an age for the temp to come up, I thought this may have an effect ( possibly carb icing ) still no joy. I had already rebuilt the carb 2 years ago with a kit from BW so thought that they should be okay, It still hesitated. Lots of problems can be caused by vacuum leaks, so I replaced my vacuum pipes, checked for air leaks around the base gasket, the inlet manifold to head gaskets, I checked the operation of the pull down unit, and the vacuum unit for the second choke. This seems like a common problem, I read through as many posts as I could find, here, Brickwerks, Golf and Polo forums. Problem : Hesitation/missfire at low RPM particularly when pulling away. ![]() Just a quick update as it may help others with similar problems with their Pierburg carb.
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June 2023
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