Cylinder 5 Misfire

elhombre · 10-08-2017, 11:49 AM

Hey guys,

On cold start today I received a random misfire code and a pending cylinder 5 Misfire.

I cleared the codes and everything seems normal. Did a few pulls and drove around to see if I could get it to misfire. Unfortunately (or fortunately) nothing came back up.

There was heavy rain over the night...maybe that's a contributing factor.

What do you guys think?

crazy4oldcars · 10-08-2017, 12:54 PM

Wait and see if it happens on cold start again tomorrow? Until you can duplicate it on demand, or at least define the cause, it's a random event.
As for the rainy day being a cause, I've only ever had that happen with one vehicle. A microcrack in the distributer would let moisture in on very rainy days and short the spark. It took forever to figure it out. Arc path in the distributer finally gave it away.

Kirk B.

SouthArk370Z · 10-08-2017, 01:58 PM

Could have been caused by a lot of things (eg, bit of dirt in #5 injector that cleared after a while). If it doesn't come back within a few days, I'd quit worrying about it.

10-08-2017, 11:49 AM	#1 (permalink)
elhombre Base Member Join Date: Feb 2016 Location: CT Posts: 93 Drives: 2009 370z Rep Power: 145	Cylinder 5 Misfire Hey guys, On cold start today I received a random misfire code and a pending cylinder 5 Misfire. I cleared the codes and everything seems normal. Did a few pulls and drove around to see if I could get it to misfire. Unfortunately (or fortunately) nothing came back up. There was heavy rain over the night...maybe that's a contributing factor. What do you guys think?

10-08-2017, 12:54 PM	#2 (permalink)
crazy4oldcars Enthusiast Member Join Date: Aug 2016 Location: SE Texas Posts: 448 Drives: '16 Nismo Tech Rep Power: 28413	Wait and see if it happens on cold start again tomorrow? Until you can duplicate it on demand, or at least define the cause, it's a random event. As for the rainy day being a cause, I've only ever had that happen with one vehicle. A microcrack in the distributer would let moisture in on very rainy days and short the spark. It took forever to figure it out. Arc path in the distributer finally gave it away. Kirk B. elhombre likes this.

10-08-2017, 01:58 PM	#3 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Could have been caused by a lot of things (eg, bit of dirt in #5 injector that cleared after a while). If it doesn't come back within a few days, I'd quit worrying about it. elhombre likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

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