I have just converted my XR2i into a fiesta turbo running a T3 and i have rebuilt the engine putting new gaskets on the head ect ect
i have got it started and running fine then suddenly after about 20 seconds it made a loud whistling noise which slowly got louder coming from the head which sounds like a air leak,
i had a listen and i couldnt locat were it was coming from, i then started to check every thing was attached e,g the brake pipe, idle valve pipe, inlet pipes, boost hoses ect ect thinking not much of it once it was warm i tryed to give it a rev,
it wouldnt rev properly and when i put my foot down it just trys to cut out
and wont properly rev or come on boost and when it dose rev
(which is done by very slowly putting your foot down) it gets to about 4500 and stops and starts to cut out, it also wont idle properly

i have changed the wiring it need e,g has frst map sensor and ECU
any ideas would be much appreciated and could help greatly