Only 17k miles into them on 97 pathfinder 180k miles. Just doing some checks to find a solution for a stumble on warm starts occasionally.
they are ngk iridium.
Should I change and put original Nissan plugs back in? Or use back ngks
No. Check the gap and for erosion, cracks of the ceramic. If all 6 are like that, great! Trouble elsewhere, …
F.S.
Hello,
That spark plug looks like the engine is running very week,
Check the securing screw for the rotor arm inside the distributor is tight,
they are famous for coming loose causing a misfire and breakdown's.
All the best.
@dvkala
Thanks for the info! I’m not having poor running conditions really. Engine feels perfectly fine and no power losses or lagging.
What is happening though is on warm starts sometimes you get some misfires. It smooths out after a couple seconds. Sometimes it fires up like normal bog once then perfect after. Never cold starts
Also randomly has vapors come out the canister vent tube.
I purchased back some Nissan plugs that’s I will be changing. These plugs look off. Very brown and looks fouled honestly.
I also purchased a new canister and it’s vent valve to change out.
Hopefully will solve issues. What do you think?
Distributor was replaced original Nissan a few months back. I’ll check the screw but I did check that when installing.
Hello,
Check the coolant level is not dropping, This could indicate a possible head gasket issue, I have included a link to Canister replacement procedure.
All the Best.
Link:- http://www.nissanpathfinders.net/forum/topic/11442-how-to-replace-evap-canister-and-valves/
@dvkala
Nope, no coolant level drops. Radiator is always full and and coolant reservoir is at the max line. It does fluctuate a bit like it should like when running engine and when's its off. But always does return to the level at which I filled it.
I'll tackle the plugs and canister when they arrive. Hopefully it will resolve issue. If not ill have to check some other things out.
But some history: Maf, tps, distributor, leads, throttle body cleaned with new gasket, new air filter, changed majority of vac lines, etc sensor and air temp sensor changed, new fuel filter, checked fuel pressure and its normal and holds for a while after engine off with no drastic drops.
All with nissan or Hitachi parts.
Let me know if you have any other ideas after this info.
Thanks again!