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March Superturbo (EK10) Forum
ST Swap Overboost
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<blockquote data-quote="Christopher Andrews" data-source="post: 755954" data-attributes="member: 15903"><p>Hello Again,</p><p></p><p>I got the Figaro running with the engine swapped over. After a lot of fiddling around with data-loggers, wide-band sensors, the Japanese factory manuals, the solution was pretty simple. I used the Figaro air filter box and MAF housing with the ST sensor installed. I never thought to check the bore on the two MAF housings. Needless to say when the sensor is calibrated for a 45mm bore and it's shooting through a 35mm housing, the car ran super rich and I couldn't drive it. In any case I'm doing a bunch of shakedown drives in the car and it pulls pretty hard but I'm having the following issues.</p><p></p><p>-Idle is super low, around 400-500 RPM. I have adjusted the right-most screw on the idle adjustment and the idle doesn't come up at all</p><p>-The car surges like crazy in 2nd gear. It feels like a bucking bronco</p><p>-At highway speed in 5th gear, it sounds a BOV is pulsing on and off. I don't have a boost gauge installed, but my guess is that something is opening and closing to modulate the boost pressure</p><p></p><p>I'm going to go through the Engine Manual and check each of the solenoid valves for the vacuum, bypass and see if they are operating. I would hate if the UFO valve or something like that was broken. Any thoughts on what might be an obvious item to check.</p></blockquote><p></p>
[QUOTE="Christopher Andrews, post: 755954, member: 15903"] Hello Again, I got the Figaro running with the engine swapped over. After a lot of fiddling around with data-loggers, wide-band sensors, the Japanese factory manuals, the solution was pretty simple. I used the Figaro air filter box and MAF housing with the ST sensor installed. I never thought to check the bore on the two MAF housings. Needless to say when the sensor is calibrated for a 45mm bore and it's shooting through a 35mm housing, the car ran super rich and I couldn't drive it. In any case I'm doing a bunch of shakedown drives in the car and it pulls pretty hard but I'm having the following issues. -Idle is super low, around 400-500 RPM. I have adjusted the right-most screw on the idle adjustment and the idle doesn't come up at all -The car surges like crazy in 2nd gear. It feels like a bucking bronco -At highway speed in 5th gear, it sounds a BOV is pulsing on and off. I don't have a boost gauge installed, but my guess is that something is opening and closing to modulate the boost pressure I'm going to go through the Engine Manual and check each of the solenoid valves for the vacuum, bypass and see if they are operating. I would hate if the UFO valve or something like that was broken. Any thoughts on what might be an obvious item to check. [/QUOTE]
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ST Swap Overboost
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