Factory plug failure!

[Unknown_Driver]

hey uh guys

if the CEL is flashing that usually means something major and to shut off the car and tow it to prevent major damage


a solid CEL is usually a lame sensor but still driveable

 

[OldSalt]

hey uh guys

if the CEL is flashing that usually means something major and to shut off the car and tow it to prevent major damage


a solid CEL is usually a lame sensor but still driveable

Or here's an idea!, Read the owners manual (In my case a 2010 Ford Taurus SHO) and follow what it says, I know that's novel but try it!

 

[Unknown_Driver]

Or here's an idea!, Read the owners manual (In my case a 2010 Ford Taurus SHO) and follow what it says, I know that's novel but try it!

i'm sorry did i make you mad? Merry Christmas to you too :wave:

its your car not mine

if you want to drive around with a misfire dumping unburnt fuel into the cats go ahead i'm not stopping you...

some people can't decode the CEL

 

[OldSalt]

Number 6 injector replaced along with the compliance with the spark plug TSB seems to have solved the problem.

 

[32MTX]

if your dealer can't figure out if a mis is fuel or spark related they aren't worth more then **** on a bull.....

its a very simple procedure that takes about 15-30 minutes to setup with the tools/electronics they have at their disposal.....

 

[OldSalt]

if your dealer can't figure out if a mis is fuel or spark related they aren't worth more then **** on a bull.....

its a very simple procedure that takes about 15-30 minutes to setup with the tools/electronics they have at their disposal.....

Not sure who your comment was directed to but My dealer seemed to be right on the money, Inspected and verified TSB was applicable and had not been performed, executed it, tested, still had mis-fire, troubleshot coils via computer link and ruled them out then ordered new injector and replaced, problem solved, only delay was parts delivery due to holidays and winter storm. The service advisor knowing his best techs were on vacation made sure the mechanic assigned to my car checked with the Ford Engineers before proceeding, IMO that was prudent and wise. :swing:

Most of all, I'm satisfied.

 

[mriboy]

Number 6 injector replaced along with the compliance with the spark plug TSB seems to have solved the problem.

Glad to hear your back up and running.

 

[venom]

i'm sorry did i make you mad? Merry Christmas to you too :wave:

its your car not mine

if you want to drive around with a misfire dumping unburnt fuel into the cats go ahead i'm not stopping you...

some people can't decode the CEL

Technically what a flashing CEL means is that a miss has been detected on a cylinder and the PCM has quit pulsing that cylinders injector because it doesn't want to let raw fuel accumulate in the cat (and Turbo on a EcoBoost).

So technically driving around with a CEL that is blinking is fairly harmless as the PCM has identified the cylinder and quit adding "fuel to the fire". But if the light goes back to solid and the car is missing then you are letting fuel go buh bye out the turbo and tailpipe.

 

[blownsho94]

Technically what a flashing CEL means is that a miss has been detected on a cylinder and the PCM has quit pulsing that cylinders injector because it doesn't want to let raw fuel accumulate in the cat (and Turbo on a EcoBoost).

So technically driving around with a CEL that is blinking is fairly harmless as the PCM has identified the cylinder and quit adding "fuel to the fire". But if the light goes back to solid and the car is missing then you are letting fuel go buh bye out the turbo and tailpipe.

Tell that to all of the 2005 Escape owners that needed new cats.....Misfires, raw fuel dumpage, PCM failure, clogged cats.....:wave:

I know, I'm living it!!

 

[SHOrod]

Technically what a flashing CEL means is that a miss has been detected on a cylinder and the PCM has quit pulsing that cylinders injector because it doesn't want to let raw fuel accumulate in the cat (and Turbo on a EcoBoost).

So technically driving around with a CEL that is blinking is fairly harmless as the PCM has identified the cylinder and quit adding "fuel to the fire". But if the light goes back to solid and the car is missing then you are letting fuel go buh bye out the turbo and tailpipe.

Actually, taking OldSalt's suggestion and reading the owner's manual for the 2010 and 2011 Taurus, as well as the 2005 Escape all say in clear text in the first section (Instrument Cluster), "If the light is blinking, engine misfire is occurring which could damage your catalytic converter. Drive in a moderate fashion (avoid heavy acceleration and deceleration) and have your vehicle serviced immediately by your authorized dealer." This would suggest that the PCM is not likely to be shutting off fuel to the offending cylinder or cylinders. So "technically" the manufacturer does not feel it's relatively harmless to continue driving the car.

-Rod

 

[blownsho94]

Actually, taking OldSalt's suggestion and reading the owner's manual for the 2010 and 2011 Taurus, as well as the 2005 Escape all say in clear text in the first section (Instrument Cluster), "If the light is blinking, engine misfire is occurring which could damage your catalytic converter. Drive in a moderate fashion (avoid heavy acceleration and deceleration) and have your vehicle serviced immediately by your authorized dealer." This would suggest that the PCM is not likely to be shutting off fuel to the offending cylinder or cylinders. So "technically" the manufacturer does not feel it's relatively harmless to continue driving the car.

-Rod

Thank you! "Limp Home Mode" does not cancel cylinder firing.

 

[cheech]

Thank you! "Limp Home Mode" does not cancel cylinder firing.

A misfire detection will cause an injector to shut off for a period of time. It will not shut it down forever.

Here is briefly how it works.......
When a misfire is first detected it blinks the check engine light (the injector is still on). When it runs its monitor again and the misfire is still present the check engine light becomes solid (injector still on).
If the the PCM determines a consistent misfire that will cause cat damage it will shut the injector off for 30-60 seconds. After the first shut off it will turn the injector on for 10 seconds then off then monitor and keep repeating this cycle. A key cycle starts the whole process over.
This can be done on up to two cylinders at once.
Prolonged driving will damage a cat.

As far as Escapes go they were the worst offenders of this. People would drive with bad coils and then a $200 repair would balloon to $2K.

 

[venom]

A misfire detection will cause an injector to shut off for a period of time. It will not shut it down forever.

Here is briefly how it works.......
When a misfire is first detected it blinks the check engine light (the injector is still on). When it runs its monitor again and the misfire is still present the check engine light becomes solid (injector still on).
If the the PCM determines a consistent misfire that will cause cat damage it will shut the injector off for 30-60 seconds. After the first shut off it will turn the injector on for 10 seconds then off then monitor and keep repeating this cycle. A key cycle starts the whole process over.
This can be done on up to two cylinders at once.
Prolonged driving will damage a cat.

As far as Escapes go they were the worst offenders of this. People would drive with bad coils and then a $200 repair would balloon to $2K.

They changed this logic some since the early days of OBD2 then which is entirely plausibly - my extensive misfire experience is with a gen 3. You can feel the incredibly annoying but intermittent miss - the CEL lights and stays on, no blinking - and scanning the code will give you a specific cylinder code. Once the miss gets to be incredibly repeatable, like unplugged coil repeatable THEN the light blinks, whenever the light is blinking on the V8 cars the discrete injector output is shut down. HOWEVER while driving the CEL will go back to solid after some duration (sure seems like much longer than 60 seconds, and more like 5 minutes) and the CEL will illuminate solid again, for a short duration before it will start blinking again if the dead cylinder is still the same.

 

[cheech]

They changed this logic some since the early days of OBD2 then which is entirely plausibly - my extensive misfire experience is with a gen 3. You can feel the incredibly annoying but intermittent miss - the CEL lights and stays on, no blinking - and scanning the code will give you a specific cylinder code. Once the miss gets to be incredibly repeatable, like unplugged coil repeatable THEN the light blinks, whenever the light is blinking on the V8 cars the discrete injector output is shut down. HOWEVER while driving the CEL will go back to solid after some duration (sure seems like much longer than 60 seconds, and more like 5 minutes) and the CEL will illuminate solid again, for a short duration before it will start blinking again if the dead cylinder is still the same.

It changed slightly. Basically it detects faster.
Your intermittent miss could be starting the misfire counter over again. The solid check engine light has no specific time limit. It depends upon when the second misfire threshold is reached.
The biggest thing about the older OBDII (pre 2004) is not all Fords will shut injectors off at all. Most of the older 4 cly would just flood the cat with fuel. However if you have a misfire on a 4 cly chances are its not going anywhere fast.