carter_Z33

so ive had a 2003 fairlaidyZ/350z for about 5 months now and parked the car and i left for a couple days and i come back to the catching a misfire and a really rough idle. so replaced the spark plugs and also noticed oil in the spark plug wells so replaced the valve covers and the ignition coils.
after i started it it still ran really bad and it sits way under 1k rpm wanting to die.

When i start it and let it warm up, i get white smoke coming from the engine bay and white smoke coming from the tailpipes
everything seems to poin to the headgasket but im not 100% i have not done a compression test yet.
Wondering if anyone else has had this problem and if you did what was your solution?

bealljk

iTrader: (13)

Yeah, white smoke is historically coolant in the combustion chamber…

Are you 100% sure you hooked up cylinder #4 and cylinder #6 coil pack connectors correctly?

Compression and leakdown test should help diagnose.

Unscrew your oil cap and do you see white-milky’ness on the underside of the cap?

Take some video / pics of the white smoke.

Are you pushing coolant out of the radiator/coolant overflow tank?

You could have moisture in your fuel tank / fuel that has some moisture in it - usually this is burnt off by the cats after warm-up.

carter_Z33

Honestly thank you so much I had cylinder 4 plug into cylinder 6

travlee

iTrader: (8)

Pretty common an easily mistaken

bealljk

iTrader: (13)

I used a paint-pen and wront each cylinder connector bc this happens quite a bit - completely non-logical how nissan laid it out.