Engine warning while accelerating cold.
12-14-2018, 10:29 AM
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Engine warning while accelerating cold.
Last two days the engine warning has come on while using about 3/4 pedal. The temp gauge on the tach is about at the 6, so, almost at temperature. If I rev upto 4k revs the engine feels rough and then the warning. If I turn off the car and restart, the warning goes away. I will get codes tomorrow.
Any ideas? V8 with 160,000, new oil, coolent and alternator this summer.
Any ideas? V8 with 160,000, new oil, coolent and alternator this summer.
12-15-2018, 08:24 AM
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What does the 'engine warning' look like? Reduced power etc? I'd find somebody with a BMW capable code reader. I bet your engine is setting a code for what you're experiencing but it's not enough to trigger the CEL. Might be simple as old spark plugs or a dodgy coil. Re-starting clears the glitch until the next event.
Later E60s dispensed with the warmup gauge/rev marker (damned shame...), but if your indicator is showing less than 'normal/warmed up' temperature that means the coolant hasn't reached full operating temperature yet. And if the coolant isn't fully warmed up, the oil certainly isn't. Hard driving when the oil hasn't fully warmed usually isn't a good thing for long engine life.
Later E60s dispensed with the warmup gauge/rev marker (damned shame...), but if your indicator is showing less than 'normal/warmed up' temperature that means the coolant hasn't reached full operating temperature yet. And if the coolant isn't fully warmed up, the oil certainly isn't. Hard driving when the oil hasn't fully warmed usually isn't a good thing for long engine life.
12-15-2018, 05:24 PM
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A picture of the engine shows on the dash and the car runs rough and the i-drive say increased emissions, have your car seen by the steeler etc. I’ll get codes tomorrow. Just wondering if anybody has had the same experience.
12-17-2018, 07:25 AM
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12-17-2018, 04:04 PM
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Yeah, that's an engine fault/reduced power icon. I've seen it as a result of an intermittent failure on my crank position sensor (CPS), or a series of bad misfires (coils, plugs, DI injectors) on other turbo cars. When the CPS glitches, the engine can run at reduced power using the cam sensors for speed detection.
Codes will be revealing.
Codes will be revealing.
12-19-2018, 07:09 PM
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Yeah, that's an engine fault/reduced power icon. I've seen it as a result of an intermittent failure on my crank position sensor (CPS), or a series of bad misfires (coils, plugs, DI injectors) on other turbo cars. When the CPS glitches, the engine can run at reduced power using the cam sensors for speed detection.
Codes will be revealing.
Codes will be revealing.
Got some codes:
27A0 Fan, electronics box
274E Misfire detection, sumcheck error
2748 Misfire detection, cylinder 7
283F oil pressure switch
I replaced the oil pressure switch last summer because it was leaking oil. it's a tough reach, and I wasn't sure I got the connector to click on properly. Maybe it's loose or off.
This happened a couple times last winter too. Again, after driving for only about 5 minutes, If I step on the gas, when the revs climb to 4000 rpm it causies a misfire to occur and the engine light will come on. This has never happened during warm weather. It may have been other cylinders too.
Dean
12-19-2018, 07:28 PM
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Could just be the coil on #7. Try switching the coil position and see if the misfire changes location with the coil. At least #7 isn't too hard to reach.
12-20-2018, 08:00 AM
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Swapping the #7 coil is a good idea.
one interesting note...today I duplicated the same route that cause the misfire yesterday, except today I put the trans in DS (sport) mode, got on it and let the revs climb to 5000 where I had to slow dow due to traffic. No misfire!
Does DS have anything to do with what’s coming out of the injectors? Any thoughts?
one interesting note...today I duplicated the same route that cause the misfire yesterday, except today I put the trans in DS (sport) mode, got on it and let the revs climb to 5000 where I had to slow dow due to traffic. No misfire!
Does DS have anything to do with what’s coming out of the injectors? Any thoughts?