car problems would anyone know thing prob
 

ok whell just wondering if anyone would know what it is.. but i took my car to the mechanic to install a boostcontroller and he said he would change my spark plugs and wire for free as long as i bought it all.. he changed them and could not install the controller since instructions didnt tell how to install on twins.. gay greddy... but when i got the car back i wouldnt want to accelerate i mean after 3k rpms it just wouldnt go anymore.. turned the car around and brought it back... this sucks it went in fine and came out running like shit....anyone know anything?

for got to say.. the wires were 10mm magnacore and the plugs were all 9s