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Old Jul 13th, 2022, 16:58   #14
Burdekin
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Join Date: Oct 2009
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Originally Posted by RCHunt View Post
Hi, have switched the car to a pair of HS6 SUs. Bought secondhand they seemed clean and correct. I suspect from my SU tuning guide that they were off an early P1800. However I just cannot get the car to run cleanly. Under acceleration car just stutters and misfires. Has twin Facet electric fuel pumps, Malpassi fuel pressure regulator. It ran fine before. Car is with local garage they are equally mystified. Any ideas? Thanks in advance.
SU can leak at the butterfly spindle bush area, with the car running spray some WD40 at the area and if the revs increase you have a problem there.

Next have you got the correct needles and how have you set the idle mixture?
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