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Message: <blockquote data-quote="jimgt95" data-source="post: 8262" data-attributes="member: 8296">Ok, you do not have a bypass. If you did, it would be a a black tube with a vacuum driven valve going from the intake side of the blower to the output side ("bypassing" the compressor). Whoever did the analysis of your problem is not right. The FMU isn't telling anything to your car, it has no electronics. The FMU is a simple (and not very precise) way of getting your 19lb injectors to flow enough fuel when you go into boost. It is just a mechanical vacuum (boost in this case) driven valve that cuts off the fuel return line to the gas tank thereby increasing the fuel pressure at your smaller injectors. The increased fuel pressure causes your injectors to flow more fuel (unmetered by the ECM). Also, your 155lph fuel pump pumps at 155lph whether you are idling or going full throttle. (This is somewhat debateable due to fluctuations in voltage going to the pump - just ask KB).So, I would recommend ditching the FMU, it is not very precise. Buy a set of larger fuel injectors. 42lbs would be plently large and leave you with room to grow for future mods. Also, buy a mass air meter calibrated for 42lb injectors or whatever size injector you go with. Go with a custom chip tune to tie it all together and you will be suprized at how much better your car drives/runs.I will post a pic of my engine to show you what the bypass looks like.</blockquote>