here we go again....got rid of the other chip that i had bought(guy gave me my money back) got one of off ebay...yes yes i know guy reckons it was a collins 190 chip i opened it up today sure enough the chip don't look standard it has like a piggy back chip on it just wondering are these chips bad for going wrong?i installed the chip and -31 was getting up to aprox 15 psi and car was poping/banging...yes i realise i need to get the car set up but as described in a earlier post i had the car up to a local tuner when i tried to fit the other chip he turned up the fuelling a touch (it was about 2% lamda reading if that is of any importance) so i thought the car was basically ready for another chip to go in is this correct or wrong

 

You'll need to take it back and have it set up on that chip thats in there now.