2010 MKS-T Flashing CEL and Missing

[TX MKS-T]

So i have less than 800 miles on my new to me 2010 Mks and been taking it pretty easy on her 35k total miles. Yesterday evening the wife and i went to dinner and i had a situation where i had to merge into traffic from a stand still. Soi nail it from a stand still and approach 70mph rather quickly with trans shifting harsh in what i thought was 3rd but not certain. Once the shift occured i got this bad stumble so let off and notice my CEL blinking and car is mis-firing at this point. Wife looks at me and says i broke the car ugh....  so i begin to exit freeway and CEL goes off and everything is normal again wth. Drove it normal since and today and car acting like normal,any ideas ?.

 

[mmh64]

You will have to do a scan with an OBDII tool. If you don't have one AutoZone does it for free. If there are stored codes retrieve those numbers to narrow it down. Someone should be able to help you with that.

 

[SHOdded]

Usually it turns out to be a case of tq management, but X2 on what mmh said.  Also check out TSBs in the HOWTO section, see if any fit the situation.

NOTE:  watch out for broken spark plugs or leaky fuel injectors if the issue recurs.

 

[ZSHO]

Definitely check for any codes especially after the check engine light was eminent and DO NOT remove the ground on the battery,there is a TSB but not quite sure its related.  Z    TSB #SB-21430
NHTSA ID #10034629
Date Announced:
JULY 01 2010
Additional Info:
How to Fix
Summary: FORD/LINCOLN: TRANSMISSION BUILT BEFORE 6/1/10 WITH 4TH GEAR START, DELAY/HESITATION ON ACCELERATION FROM A STOP-NO DTCS. THIS MAY BE CAUSED BY A STICKING MULTIPLEX SHIFT VALVE IN THE VALVE BODY. *PE

 

[BiGMaC]

Also... Remember that if the CEL flashing you mention means blinking... Turn of the ignition and don't drive the car.... If the CEL was steadily lit while on then you cans start the hunt.

 

[TX MKS-T]

Well tried 2 different places to read any codes that may have been stored and nothing. Both places say nothing was stored. Been driving car still and all is normal so I'm at a loss on what happened...

I tried thinking of the conditions that evening and it was humid than normal and I haven't cleaned the CAC yet. I also had less than 1/4 tank of fuel but other than that nothing outside of the ordinary. I still need to set an appt for the inspection on my ESP so need to baby it till then or even park it.

 

[TSS]

Fuel injector is my guess as well.

 

[BiGMaC]

I had this happen in my '13 SHO...  I was accelerating hard from a stop with the wheel turned to the left. The car jumped up and then fell flat... Acted like limp mode... Turned her off, restarted, and drove away normally. CEL never came back.  My dealer couldn't find anything... Not even one of those codes that are set and will only set a true DTC if it happens too often... That was over a year ago. It has never done that "jump up and drop flat" thing again.... Running like a top!....  Still, you gotta pursue it until all avenues are done.

 

[TX MKS-T]

So it did it again this time though I got a smell of rotten egg once I got home as I was down the street. Light stopped flashing by the time I got home and all was normal again aside from that rotten egg stench...

 

[SHOdded]

Bad gas.  Don't hear about it  (smell) much anymore,  but there it is.

 

[TX MKS-T]

So the other day this random or so I thought was random concern started presenting itself again while I was enjoying a joy ride with my brother this past weekend. It did it from launch and even from a low 30 roll and happened to notice my gas was 1/4 full...

So next morning I went and filled up on 93* and mirrored my driving from prior day and what do you know no issue and smooth. Do our tanks have baffles because it seems to be realted to fuel starvation.

 

[ajpturbo]

Doubt its fuel starvation...these are highly engineered vehicles...im sure they are baffled ...dont think they mention anything in the owners manual about fuel levels and fuel starvation but i could be wrong

 

[FoMoCoSHO]

I've driven mine to zero miles to empty (and beyond) quite a few times without issue.

 

[sholxgt]

I am probably way out there on this one, but here's a thought...

Way back in the day, a buddy of mine had an over sensitive inertial switch on his Mustang.  When he would shift hard or launch hard it would cut off the fuel pump for a split second thinking that the car had been in an accident.  Took some time to figure that one out, but once we bypassed the inertial switch, problem solved.

Not sure if these cars have an inertia switch or not.  Old Fords had them located in the trunk with a button that could reset the switch.

 

[SHOdded]

I don't see a mention of a cutoff or iinertia switch after 2009 MY, but there might be one.

Fuel Pump (FP) Shut-off Feature

NOTE: Refer to the Description and Operation, Intelligent Access with Push Button Start in Section 419-01B to review the procedures for achieving the various ignition states (ignition OFF, ignition in ACCESSORY, ignition ON and ignition START) on vehicles with this feature.

In the event of a moderate to severe collision, the vehicle is equipped with a Fuel Pump (FP) shut-off feature that is initiated by the event notification signal.

The event notification signal is a signal provided by the Restraints Control Module (RCM) to the FP control module. Signal communication between the RCM and the FP control module allows the PCM to shut-off the FP .

Should the vehicle shut off after a collision due to this feature, the vehicle may be restarted by first turning the ignition to the OFF position and then turn the ignition to the ON position. In some instances the vehicle may not start the first time and may take one additional ignition cycle.

 

[sholxgt]

I don't see a mention of a cutoff or iinertia switch after 2009 MY, but there might be one.

Fuel Pump (FP) Shut-off Feature

NOTE: Refer to the Description and Operation, Intelligent Access with Push Button Start in Section 419-01B to review the procedures for achieving the various ignition states (ignition OFF, ignition in ACCESSORY, ignition ON and ignition START) on vehicles with this feature.

In the event of a moderate to severe collision, the vehicle is equipped with a Fuel Pump (FP) shut-off feature that is initiated by the event notification signal.

The event notification signal is a signal provided by the Restraints Control Module (RCM) to the FP control module. Signal communication between the RCM and the FP control module allows the PCM to shut-off the FP .

Should the vehicle shut off after a collision due to this feature, the vehicle may be restarted by first turning the ignition to the OFF position and then turn the ignition to the ON position. In some instances the vehicle may not start the first time and may take one additional ignition cycle.

Interesting!  As usual, you are a wealth of information.  Sounds like instead of an inertia switch, they now collect the data from the restraint system.

Back to the OP, does it only happen with a passenger?  This is probably a crazy idea...Wonder if there's a problem with the passenger side seat belt sensor?

Another thought I have is that the PTU isn't working which is overworking the traction control to the point that it's having to basically stop all power production to stop the wheel spin.  That would account for a CEL.

 

[TX MKS-T]

I don't see a mention of a cutoff or iinertia switch after 2009 MY, but there might be one.

Fuel Pump (FP) Shut-off Feature

NOTE: Refer to the Description and Operation, Intelligent Access with Push Button Start in Section 419-01B to review the procedures for achieving the various ignition states (ignition OFF, ignition in ACCESSORY, ignition ON and ignition START) on vehicles with this feature.

In the event of a moderate to severe collision, the vehicle is equipped with a Fuel Pump (FP) shut-off feature that is initiated by the event notification signal.

The event notification signal is a signal provided by the Restraints Control Module (RCM) to the FP control module. Signal communication between the RCM and the FP control module allows the PCM to shut-off the FP .

Should the vehicle shut off after a collision due to this feature, the vehicle may be restarted by first turning the ignition to the OFF position and then turn the ignition to the ON position. In some instances the vehicle may not start the first time and may take one additional ignition cycle.

Very interesting !  But if this was occurring id expect my car to shut off and not run in limp mode id assume. Still on the hunt for the issue though as its preventing me from modding further outside of my K&N panel filter.


Sholxgt - It happen either with pass or not. And I seem to be only to replicate when the gas level is 1/4 or lower and when it occurs its for maybe 15 seconds of limp mode CEL flashing then CEl goes off and normalcy is restored again.

 

[sholxgt]

Wonder if it's tied somehow to the traction control system?  Do you have traction loss or interference from the traction control system prior to the CEL?  Thinking that you may be getting a fuel cut by the traction control system that is then leading to some kind of aftermath.

Maybe try a few passes with the traction control turned off and see what happens? 

 

[TX MKS-T]

Wonder if it's tied somehow to the traction control system?  Do you have traction loss or interference from the traction control system prior to the CEL?  Thinking that you may be getting a fuel cut by the traction control system that is then leading to some kind of aftermath.

Maybe try a few passes with the traction control turned off and see what happens?

I usually disable traction control anytime I plan on "joy riding" so been off when the issue presents itself.

 

[glock-coma]

Wonder if it's tied somehow to the traction control system?  Do you have traction loss or interference from the traction control system prior to the CEL?  Thinking that you may be getting a fuel cut by the traction control system that is then leading to some kind of aftermath.

Maybe try a few passes with the traction control turned off and see what happens?

I usually disable traction control anytime I plan on "joy riding" so been off when the issue presents itself.

There's really now way to completely turn off the traction control unless yo have the performance package SHO. I don't believe that feature was available on the MKS.
When I go to the track it still kicks in even when "off"


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