Big Sky Euro

i get code. PO300 mitlia misfire an PO303 an PO305 meaning misfire in only cilander 3 an 5. it only happi 2 times now. an only for about 5 to 10 seconds. but when i give it gas for a moment or a couple times it will go away an run like a champ....... when i look on all data pro. gives me saying injectors failing...spark plugs... an coil. an the engine sensor. ..... info.. plugs are NGK iridums (new well 4000 miles on them).. Coil is new.. an wires are new.....


im figuring injectors.. becasues of what is going on. but ask you guys for a second opione on this one..

Sounds like a ignition coil pack to me, but I have seen the same symptoms from a vacuum leak. Check all your vac and breather lines and look for splits and look closely for cracks that are not visible. If you just replaced your coil, wires and plugs, the check your wires and boots on both ends and make sure they are all seated correctly - sometimes they take a more than usual force to make them snap on, especially when they are new.

I really don't think it's your injectors, because they rarely go bad, and you have two DTC's for separate misfires and it's intermittent, not constant - a dead injector is a dead injector.

the plug wires on on tight. an theres not many vac lines on this one... well that i know of or found. i have replaced a couple of hard lines. my first code is the PO300 which leads to injectors first on the check line up. i agree a dead injector would be dead.......hmmmmmmmm.....

Ya, P0300 is a generic OBDII misfire code - it's pretty, well, generic. It may be more helpful to get it scanned with VCDS.

it would.........