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Author Topic: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine  (Read 11421 times)

Offline FearlessAZ

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Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« on: January 09, 2018, 08:19:41 AM »
Been trying to track down the cause of random misfires lately. Just after Thanksgiving, got a random misfire on cylinder 5 while driving back from Tucson. Cleared it and haven't thought much of it. Figured it was cause the wife put in 87 instead of 91. Just a couple days ago got another random misfire but on cylinder 2. Went to clear it and noticed a p0300 code as well. Spark plugs are still fairly new. Maybe 12K-15K at most. I will dig in to it more later when I have some free time. Just scratching my head on it.
« Last Edit: April 29, 2018, 04:37:54 AM by SHOdded »
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Offline SHOdded

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #1 on: January 09, 2018, 09:54:24 AM »
Plugs and injectors are the usual culprits, sometime leaky VC gaskets.  Interesting it showed on 2 & 5, as they fire sequentially.  Waste spark is not used in this ignition system, so ...  Poor fuel/insufficient octane can also be culprits, as you have noted.
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline AJP turbo

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #2 on: January 09, 2018, 11:10:32 AM »
Im suspecting coils due to the age
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Offline ZSHO

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #3 on: January 09, 2018, 02:17:50 PM »
Plugs and injectors are the usual culprits, sometime leaky VC gaskets.  Interesting it showed on 2 & 5, as they fire sequentially.  Waste spark is not used in this ignition system, so ...  Poor fuel/insufficient octane can also be culprits, as you have noted.
Manu maybe "troubleshooting section" perhaps for better traction! Thanks!  Z  :)
« Last Edit: January 09, 2018, 02:31:05 PM by ZSHO »


2013 Performance Package SHO| Livernois Custom Methanol Tune|3-Bar Map|Reische-170-Stat|Full Race Tial-10psi BOV in Black|PPE-Gloss Black Hot Pipes|PPE Catted DP|Corsa Sport Cat Back Exhaust|H&R Sport-Springs|Airaid-Dry-flow-CAI|CFM Performance Billet Valve Cover Breather In Gloss Black|Llumar 20%Ceramic window Tint|MSD Ignition Coils in Black|Extreme Roof Spoiler|Redline Fluids all around|Gearhead Intercooler|First-SHO With Direct Port Alky-VP-M1-100%-Methanol Injection|LMS-Custom-Dyno-Tuned @ 415whp-465wtq| Best Trap Speed of 115.54 mph|

Offline FearlessAZ

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #4 on: January 11, 2018, 06:21:29 AM »
Plugs and injectors are the usual culprits, sometime leaky VC gaskets.  Interesting it showed on 2 & 5, as they fire sequentially.  Waste spark is not used in this ignition system, so ...  Poor fuel/insufficient octane can also be culprits, as you have noted.

She knows that I stress 91 only and nothing less. And she knows I made a deal out of it the one time I found out. It is entirely possible she did it again and did not tell me.

That is good to know because they are both next to eachother. I will keep my eyes peeled.

Were they all gapped the same ?


Yes. All were gapped at about .029. When I have time, I will go through and recheck the gap and double check the plugs.

Im suspecting coils due to the age

That is very possible too. I know They are still the factory coils. I can check them out when I check the plugs. Any things to look for specifically? I know I am overdue for a data log now that all the new parts have had time to settle and be broken in. Would that possibly show an injector or 2 starting to go out?
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Offline FearlessAZ

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #5 on: January 12, 2018, 08:52:09 AM »
Manu maybe "troubleshooting section" perhaps for better traction! Thanks!  Z  :)

Thank you. Was going to start one and just been super busy lately. Didn't mean for that post to go for more than a response. Lol
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Offline SHOdded

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #6 on: January 12, 2018, 09:06:02 AM »
Administrative detail.  No biggie.
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline jimmyducati

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #7 on: February 04, 2018, 02:54:09 PM »
I had the same problem although just cylinder #6. Try swapping both coils with two known good cylinders and seeing if the problem follows. If not, the injectors are not to terribly expensive and are actually rather easy to R&R. As a bonus, you’ll get to scope your intake valves pretty easily and see their condition!
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Offline FearlessAZ

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #8 on: March 14, 2018, 04:28:26 PM »
Plugs and injectors are the usual culprits, sometime leaky VC gaskets.  Interesting it showed on 2 & 5, as they fire sequentially.  Waste spark is not used in this ignition system, so ...  Poor fuel/insufficient octane can also be culprits, as you have noted.


It has been driven a lot less lately. But I need to get it ready for a road trip in about a week. I have cleared the code a couple times. Seems it is just misfire for cylinder 2 now. I will try to get into it tomorrow. Gonna flash back to stock for the time being just in case it needs to make a quick dealership trip.
2010 Non PP Sho. All the factory goodies. (RIP)


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Offline SHOdded

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #9 on: March 14, 2018, 04:57:00 PM »
Guess it is now wait and see!
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline FearlessAZ

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #10 on: March 15, 2018, 11:48:45 AM »
Cylinder 2 in the one on the rear in the middle, correct? Figured I would start at the problem. When I looked at my notes last night, Seems like I have about 15K miles on the plugs. Doesn't seem like too much to me.
2010 Non PP Sho. All the factory goodies. (RIP)


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Offline ZSHO

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #11 on: March 15, 2018, 12:00:33 PM »
Cylinder 2 in the one on the rear in the middle, correct? Figured I would start at the problem. When I looked at my notes last night, Seems like I have about 15K miles on the plugs. Doesn't seem like too much to me.
Correct! Rear middle cylinder. Z

                      1       2        3

                      4       5        6


                            Front bank of engine
« Last Edit: March 15, 2018, 03:36:03 PM by ZSHO »


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Offline SHOdded

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #12 on: March 15, 2018, 03:07:51 PM »
Well, Livernois has stated 15K as plug change intervals, so you are right at that boundary :)
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline FearlessAZ

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #13 on: March 15, 2018, 05:34:33 PM »
Plug 2
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Offline SHOdded

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Re: Random Misfires 2010 NonPP SHO, Diagnosis -- No Oil in Engine
« Reply #14 on: March 15, 2018, 10:23:54 PM »
Part lean, part rich electrode?  No buildup though.  what is the measured gap?  consistent with the other plugs on that bank?
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

 

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