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#1
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Recent coil/misfire problems
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Cal Tidewater Virginia, USA 2005 X5 3.0i 315,000 miles! |
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#2
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Seafoam is way way overrated IMO. It's just a bottle of light oil carrier/light solvents....IMO. I think Amsoil is a good flush, but even that, just run it for 15 min and dump it out
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#3
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Todays cold start yielded a single cylinder misfire, definetly not two or three. I let it idle and it cleared up and ran smoothly in less than a minute and was fine for my entire commute. It did not trip the SES light. After swapping 1+3 coils yesterday, this tells me it was probably cylinder 1 that misfired. I will pull the codes at lunch and see if I have a pending code for the misfire. If no pending code, I'm not sure what I'll do. Suggestions welcomed.
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Cal Tidewater Virginia, USA 2005 X5 3.0i 315,000 miles! |
#4
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The STRANGEST thing just happened. Started the X to go to lunch. As usual it started with a miss, and tripped the SES. Drove it about 3 miles and parked. While parked I decided to clear the codes. Foxwell said cylinders 3,4 and 5 were at fault. I let it run while I cleared the codes and heres the weird part, the instant the codes cleared so did the miss! Normally I would chalk that up to coincidence but this is the second time in as many days it has happened. WHAT is going on? Why would/could clearing a code rectify a misfiring cylinder?
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Cal Tidewater Virginia, USA 2005 X5 3.0i 315,000 miles! |
#5
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If the DME picks up a bad enough problem with a cylinder it can cut fuel to that cylinder cutting it out completely for emmissions reasons. When you clear the code it resets that process.
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1988 325is (purchased new) sold 2004 X5 3.0 2005 X3 2.5 2008 X5 3.0 (new to me) |
#6
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Not familiar with the 3.0i but if it has it check the plug on the valvetronic is not loose
Sent from my SM-A730F using Tapatalk
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"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course |
#7
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What could be a significant enough problem? It runs great after the codes are cleared. The problem starts with a cold start, every day now it is a lumpy idle in the morning. Some days take longer to smooth out than others. Is the timing or duration of the injection pulse different when cold? I would assume so. What "controls" the injectors? The DME? Should I search for pending codes elsewhere? If so, where? Should I have done anything when I installed the new coils or battery? TIA
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Cal Tidewater Virginia, USA 2005 X5 3.0i 315,000 miles! |
#8
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That sounds like a good idea but I have no clue where that plug would be on the 3.0i... I'll look at the parts diagrams and see if I can figure it out. Thanks
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Cal Tidewater Virginia, USA 2005 X5 3.0i 315,000 miles! |
#9
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Quote:
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1988 325is (purchased new) sold 2004 X5 3.0 2005 X3 2.5 2008 X5 3.0 (new to me) |
#10
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Quote:
I'll pull the codes and see if I have a pending misfire code. Would a misfire due to a poorly operating injector be enough for the DME to shut that cylinder down? I did run a can of Seafoam through this last tank, maybe it actually helped and that's why it didn't act so poorly this morning. Thanks for the help, I need it!
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Cal Tidewater Virginia, USA 2005 X5 3.0i 315,000 miles! |
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