07-12-2022, 09:55 PM | #1 |
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Changed Plugs and Coils. Stuttering and Unknown Codes
Vehicle: 2015 BMW X5 xDrive35i 133k miles
Background: Noticed my X5 has been hesitating on start up a lot lately. To the point of almost dying then revs high and back to normal idle. Last week changed my spark plugs with FCP Bosch Double Platinums. Start up improved but still had slight hesitation and vehicle stuttered on drive. Then check engine light came on with codes. Changed out coils today with a new set from FCP Delphi and start up sounds great but there was a stutter in the exhaust. Check connections by unplugging the connection to the coils and testing each one. Looks like 1 & 3 connections were loose into the coil. Made sure it was a tight connection and that resolved the engine stutter. Drove down the street and vehicle stutters then check engine light came on with the below codes on scanner: Permanent Codes - Motor Electronics: FF102A No description available 581080 No description available Error Memory - Motor Electronics: 6 errors 140010: Misfire, multiple cylinders: detected 140310: Misfire, cylinder 3: detected 140001: Misfiring, multiple cylinders: Injection is switched off 140301: Misfire, cylinder 3: Injection is switched off 140002: Misfiring, multiple cylinders: harmful to exhaust gas after starting 140302: Misfire, cylinder 3: harmful to exhaust gas after starting Internal Memory 231501 Error memory entry: Send buffer full 140011 Misfiring: Injection shutdown Cannot seem to find anything on the above permanent codes. This has been a headache. Not sure what could be the issue as the car ran fine prior to changing anything out. Now it’s stuttering and throwing codes. Any suggestions? Spark plugs were torqued to spec. Coil connections were checked to make sure they were in nice and tight. |
07-12-2022, 10:02 PM | #2 |
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remove the #3 spark plus, check the gap if the gap is correct make sure the ignition coil is seated and plugged in correctly.
clear codes and restart. try moving #3 coil to #1 and see if the problem follows it. |
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07-13-2022, 03:34 PM | #3 |
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I'll try that as soon as I get a chance. Just a slight update, I cleared the codes and it runs like normal. Then drove up the street again and same issue occurs. Engine light comes on and cylinder 3 error codes pop up. I unplugged the coil to cylinder 3 and it starts bogging so 3 is working. Is this possibly a computer issue somewhere? I've also unplugged the battery for 2 hours with no improvement.
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07-13-2022, 05:04 PM | #4 |
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Assume that your read the other thread here where a member suggests re-calibration of the injectors using ISTA?
Injector Calibration |
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07-13-2022, 05:31 PM | #5 | |
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Quote:
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12-12-2023, 09:05 PM | #6 | |
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Quote:
Car was driving fine just cruisin on the highway and it started to shake all of the sudden. |
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12-13-2023, 06:57 AM | #7 |
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Injector coding and calibration isn’t required for a plug/coil replacement. Swap plugs around to see if it follows.
It’s easy to mess up the gap on a plug install on these cars.
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2017 X5 XDrive35i X-Line | Sophisto Grey | MHD Full Flexfuel Tuned | Mosselman Turbo| Sutphin Tuning TCU | Nostrum Stage 2 HPFP | ER Charge Pipe | BimmerHausPerformance Intake and Inlet | ApexBuilt Catted DP | VRSF FMIC | Zeitronix Flexfuel Kit | KateCool Oil Cooler | Variant Wheels | Conti DWS06+ |
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12-14-2023, 08:07 AM | #8 | |
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Where do you go in ISTA to test the injectors? |
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12-14-2023, 09:05 AM | #9 |
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That’s a fair point. When I was going through this my next step was injector testing. However I didn’t use ISTA but rather a data logging tool to show timing pulls.
As an aside, myself and a few other non f15 folks earlier this year (kern417 on YT for example) were suffering misfires causing by faulty oxygen sensors so something to keep in mind.
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2017 X5 XDrive35i X-Line | Sophisto Grey | MHD Full Flexfuel Tuned | Mosselman Turbo| Sutphin Tuning TCU | Nostrum Stage 2 HPFP | ER Charge Pipe | BimmerHausPerformance Intake and Inlet | ApexBuilt Catted DP | VRSF FMIC | Zeitronix Flexfuel Kit | KateCool Oil Cooler | Variant Wheels | Conti DWS06+ |
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12-14-2023, 10:41 AM | #10 |
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Most likely injector three is faulted or leaking
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12-14-2023, 11:14 AM | #11 |
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I'd say gap or bad spark plug, if you tried a good known coil.
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