hello everyone hope you can help me I've got these two probs . i had to change the top manifold because the throttle body bolts were threaded. i got a replacement manifold and fitted it the TB was a little bit different and i had to change the sensor on the right as the plug was diffrent https://passionford.com/forum/ford-r...turbo-efi.html like this one i think its ofac . when i started it after it just sat at 500rpm and tried to stall every so often but drives OK . it did sort of idle OK before revved a bit higher when cold and lowered as it warmed up ,did hunt though, .I've got it at the garage to be tested and its failed on emissions gutted . could it be a air , vacuum leak or are the ofac TB and ICV different and i need to change them for the old ofab ones any help would be excellent

1990 frst t2 stage 2 chip with baiges 190bhp ofab past mot ok last year ???

cheeRS Andy