hi i have a 308 and it is missing when hot. when its cold its runs perfect have changed dizzy cap, rotor, plugs, leads, ignition module everything? what could it be

coil?? What car is it in?? Injected or carby

have changed the coil aswell and its injected

Is it a constant miss or only low revs/ hi revs ect.... Could be a sticky valve and only sticks when it heats up due to metal swelling when hot...do a comp test next time when it's hot... If its on idol pull 1 injector wire off at a time and see of it changes note this will determine what cylinder is down but that only works on idol...... A comp test is the best place to start

Firstly if injected its 304 , try a blink code test n if comes back system normal , try isolating the miss fire by removing each injector plug while it missing once kno which cylinder missing fault finding will become easier

Lol does that really matter 304 308 same .... Do a comp test when it's hot

no it dont matter if 304 or 308 but the more accurate info he gives the easier it'll be to help diagnose ---------- Post added 19-04-12 at 21:12 ---------- +1 on comp test but also try blink test its by far the easiest test to do