ive had a little problem with it since the night we fired it up, i knew it sounded rough so i changed the plugs, still the same. i checked the dizzy cap and 2 of the points were pretty much gone, new cap and rotor arm, still the same. number 1 and 2 were off as when i pulled the leads out nothing happend, pull 3 and 4 out and it conked out, my head was farting as to why 1 and 2 were off.
so i left it at that yesterday, went down today, took the rocker cover off to see if any shims had worked there way out, all was fine. i then cleaned the MAF and did a fault code check, 55 which is all clear. so i swapped number 2 and 3 injector, when i fired her up still the same excpet the problem followed the injector, this time when i pulled number 2 lead out it conked out, fired it back up, pulled number 3 out and it did nothing. the pistons were nice and wet so im thinking that the injectors are over fuelling and extinguishing the spark