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2003 Lincoln Aviator Question: PO316 MISFIRE CODE???

 

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Legend1030, Vallejo, CA, January 04, 2011, 13:20
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i HAVE BEEN GETTING THE PO316 CODE FOR THE LAST 3 MONTHS. I HAVE FOUND 7 OTHER LINCOLN AVIATOR OWNERS EXPERIENCING THE SAME PROBLEM. BETWEEN THE RANGE OF 40-60 THE TRUCK STUTTERS, STAULS AND RUNS EXTREMELY ROUGH. WE ALL HAVE LAREADY CHANGED THE COILS, COIL PACKS, SPARK PLUGS, FUEL FILTER, THROTTLE SENSOR, CAM SENSOR, CRANK SENSOR AND ARE LEFT WITH THE SAME PROBLEM. I HAVE ALSO HAD 3 LOCAL MECHANIC SHOPS RUN 1 HOUR DIAGNOSTICS ON THE TRUCK AS WELL AS A PERSONAL MECHANIC AND THE PO316 MISFIRE CODE IS VERY VAGUE. IF ANYONE HAS A RESOLUTION TO THIS PROBLEM PLEASE LET ME KNOW.

THANK YOU
LISA
FRUSTRATED OWNER

6 Answers
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  • Answer #1

    January 04, 2011, 13:29
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     Master

    it is a missfire detected at 1000 rpm or under on start up.
    could be carbon on the valves, faulty injector or a possible compression issue.
    i know you have been to 3 shops but it sounds like nobody has tracked it down for you. you need someone who is very familiar with ford issues to help you out, possibly a dealer.

    Roy

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    Legend1030, January 04, 2011, 14:10
     Rookie

    DO YOU THINK THE MECHANICS I BROUGHT IT TOO WOULD HAVE SEEN THE THINGS YOU MENTIONED? LIKE CARBON ON THE VALVES, ETC? THE ONLY THINK THEY WERE TELLING ME IS THAT IS THE COILS, WHICH WE CHANGED. I DID CALL A FORD DEALER TODAY, NO RECALS ON IT AND HE SAID ITMIGHT HAVE SOMTHING TO DO WITH THE FUEL SYSTEM. I HAD A VERY EXPERIENCED DEISEL MECHANIC OF MANY YEARS LOOK AT IT AND HE SAID IF IT WAS ANYTHING WITH THE FUEL SYSTEM THE TRUCK WOULD STALL WHEN IDILING OR RUN ROUGH WHEN IDILING??

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    Visitor, January 04, 2011, 14:21

    no, they wont see it as it is inside the motor.
    i dont totally agree with his assesment of the fuel system causing stalling and rough idle.
    wish you were closer so I could help you.
    if you trust your guy then let him try to fix it,

    Roy

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  • Answer #2

    Hal... (see my shops), January 04, 2011, 14:01
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     Master

    It takes three things to light it off: Spark, fuel and compression. There are two TSBs for misfires relating to compression/leakdown tests and then the coils. Was a compression and leakdown test performed? Your injectors may be dirty as well.

    Typical misfires are from

    Faulty spark plug or wire
    Faulty coil (pack)
    Faulty oxygen sensor(s)
    Faulty fuel injector
    Burned exhaust valve
    Faulty catalytic converter(s)
    Running out of fuel
    Poor compression
    Defective computer

    You could call Adrian at Milt's. I just talked to him and he didn't know I told you we would look at your vehicle for free. He'll give you the frist hour and discount additional time if he needs to do a compression/leakdown. Good luck.

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  • Answer #3

    January 04, 2011, 15:22
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     Master

    Was there any other code in the ECM together with the P0316? Usually there is another cylinder specific misfire code, like P030X??
    I'd check fuel pressure and compression among the MAF sensor.
    The Ford dealer should replaced the ignition coils for free if you have less than 120,000 miles, since they extended the warranty due to failing coils.
    Are the new coils OE from Ford or aftermarket? There are many bad quality coils out there which are failing the coil stress test right out of the box.
    Could you tell us also what kind of spark plugs are installed? Did you get the spark plug boots replaced also (they are between the coils and the spark plugs)??
    Failing or dirty fuel injector can also cause misfire.

    Zee

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    Legend1030, January 04, 2011, 15:50
     Rookie

    There was no other code. The check engine light will come on and off and it only reads the PO316. The coils that were replaced were aftermarket, i did hear about quality of the store bought compared to manufacturer. I will mention to the mechanic tonight about fuel pressure and compression. The boots were not replaced either.

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    Visitor, January 04, 2011, 15:53

    just to add to zee, boots are critical. however if he replaced the coils aftermarket, the boots should be part of the new coils. ask him before you assume he did not replace them.

    Roy

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    Legend1030, January 04, 2011, 15:55
     Rookie

    Platnium 4 prong sprak plugs in #6 cyclnder and 1 coil pack in #6 cyclinder

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    Visitor, January 04, 2011, 15:57

    is that the only coil he replaced?? not all 8??

    roy

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    Hal..., January 04, 2011, 15:59
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     Master

    Why only #6? How many miles on the truck now? We may have just found the problem.

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    Legend1030, January 04, 2011, 16:01
     Rookie

    Only #6 has been replaced. That was the only reading all mechanics were getting. There are 73K on the truck. Other owners ive spoken with have already chaged all plus more and they are still having the same problem.

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    Visitor, January 04, 2011, 16:04

    he should check the companion cylinder as it could very well have caused the code as well. when the computer sees this missfire, it takes the best guess it can on the cylinder but is not always correct.
    i suggest replacing all coils with boots.
    as far as the other people, every problem is different and yours is different than theres.

    good luck

    roy

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    Hal..., January 04, 2011, 16:04
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     Master

    What reading? Was there also a P0306 code? I would swap coil/boot to the next cylinder to see if the misfire moves to the other cylinder but would do a compression check.

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    Legend1030, January 04, 2011, 16:05
     Rookie

    thank you for your help

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    ZeeTech, January 04, 2011, 16:11
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     Master

    Is that a Bosch platinum spark plug?
    I'd replace ALL the plugs with the OE Motorcraft plugs, stress test the coils and replace all that fails the test.
    You can not really based your repair strategy based on other's experience. Many different things could cause misfire problems, like unmatched spark plug. It could change the time of the combustion and the ECM will pick that up as a misfire.

    Zee

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  • Answer #4

    January 04, 2011, 23:10
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     Master

    Gonna throw a wrench into the works here -- have an alternator ripple test done. Sometimes the alternator has been known to throw out some RF interference to the processor, causing the misfire, the P0316 code, etc. You can chase coils and plugs and such all day long, and in the end have an alternator issue... Been there.

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    losangeles350, November 23, 2012, 23:24
     Rookie

    Has anyone found a solution to this? I HATE IT WHEN PEOPLE GET HELP ON THE INTERNET AND NEVER COME BACK TO UPDATE! I have the exact same problem. AT 40-60 MPH THE ENGINE RUNS EXTREMELY ROUGH AND THE CHECK ENGINE LIGHT BLINKS. ALL NEW COILS, NEW BOOTS AND ALL NEW NGK PLUGS. The engine also idles rough. I checked for bad vacuum hoses too and they all look good. I run only premium fuel and have ran a few tanks with Lucas fuel system treatment. This truck's engine is turning into a money pit.

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  • Medium-star Best Answer
    November 29, 2012, 18:41
     Rookie

    SO. I'll answer my own question. I got back from my road trip and hooked up my code reader and here they are the codes!

    P0208...injector wiring fault
    P0308...cylinder 8 misfire
    P0300...multiple cylinder misfire
    P0316...misfire shortly after start up

    Seeing that there was an injector fault, I tweaked the injectors 5-8 (known problem area on this engine)kind of twisting them and unplugging and replugging the connectors. Also moved cylinder 8 coil to 1 to see if the misfire would come back and guess what? It did not! The rough driving and stuttering at 40-60 MPH is GONE! SOMEONE HAS TO ANSWER THIS SINCE THE ORIGINAL IDIOT POSTER DID NOT COME BACK TO POST A SOLUTION!!!

    So now I'm back to square one trying to find a solution to the infamous rough idle with no error codes problem that I have been trying to hunt down since the beginning. This was the reason I put all new coils and plugs to begin with.

    I also have a noise under the truck that I always thought to be a bad catalytic converter. I took it to a muffler shop and they told me it was not the cats. They brought me over and I heard it myself. The noise is not coming from the catalytic converters but rather sounds like it might possibly be a bearing on the flywheel. The noise goes away with a little acceleration. Ah well. Hope this helps someone out.

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    dwilson2k, February 22, 2013, 21:47
     Rookie

    Not sure if your still working on this issue or not but, did you do(or get done) a ripple test on your altenator? Sometimes known to interfere with electronic signals when diodes begin to go bad, this could lead to rough idle possibly.

    Thanks for this post and your sugestions. I've been chasing down these symptoms for a looooong time.

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  • Answer #6

    June 20, 2014, 12:44
     Rookie

    it means it needs a new camshaft and that the enginechain broke

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