i have a si with series one turbo engine, i converted my 2i loom to ofac plugged in the ofac map sensor, ofac ecu and dissconnected pin 2 on the edis the iat sensor has also been changed to a frst one, now it wont tickover and hunts really badly and sounds like it is missing around 1250rpm but once in the boost it goes well and runs great then when approaching a stop it cuts out!

tryed reverting the 2 pins on the ecu back to where they were and the problem reversed it would tickover great but would backfire through the air filter and miss when throttle was pressed

the engine has a kent cam, t3 turbo, vernier pulley, low comp pistons is bored out +20 k&n filter and mongoose exhaust currently only running 7psi. can anyone help

 

There's a few very clued up people on www.fiestaturbo.com worth asking on there as a few of the guys have converted to RST power.