Originally Posted by
The Crocodile Hunter
I have an annoying problem with my saph and I need some help.
It has an annoying misfire on boost problem. So far I have tried 3 sets of plugs (both 071's and 57c's), new leads, cap and arm, checked the gap on the crank and phase sensor which both seem ok, but it's still doing it?
Yesterday I noticed that if you feed the boost in more gradually it's ok, however if you just bang full throttle open as soon as it hits full boost (about 25psi) it will misfire once and then pull cleanly up to the top end?
I'm now thinking it's not an ignition fault but something else?
Anyone had something similar before?
Cheers
I'd put a pound on that you are simply be hitting the 'boost cut' on a stage 3 greens chip.
This would explain why you can "nurse" the boost in as it won't spike doing it that way.
Check the actuator pre-load. 3-4mm of preload IIRC. If it's ok then you'll need to jet the amal valve to reduce the boost.
Also make sure there are no leaks and all hose clips are tight.