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Message: <blockquote data-quote="EFN" data-source="post: 404358" data-attributes="member: 1416">errr sorry to barge in to this.The problem that you described I am certain that your SGTi have over fuel enrichment problem. I have a business selling Adjustable Fuel Pressure Regulator and during the course of installing A-FPRs into customers cars including SGTi, I have noticed that ALL of Proton cars are set at very high Fuel Pressure level - over 38PSI at idle, sot that would mean that at full-throttle the fuel pressure would be in the region of 47 to 48PSI. I believe the reason Proton set the fuel pressure high is because they want to ensure that all of their engines will not experience any Knocking (pre-ignition) no matter how hot the condition is - but by doing so it will sacrifice throttle response and induce msifiring albeit not as noticable.All of my customers driving 4G93P are now driving with fuel pressure set at 36PSI max, some even run 32PSI. With those pressure range there are no more jerks and throttle response are snap happy.Yes I know, this might sounded like some cheap advertisement for my A-FPR, but that does not deny the fact that I have seen for myself and info that I can share. hope this helps.</blockquote>

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