- #678 of 751
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Re: My 1998 740il idles rough, and surges [dougmc]
by Mr_Shiftright HOST
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Jun 01, 2009 (6:04 am)
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Replying to: dougmc (May 31, 2009 9:03 pm)
Might be a small vacuum leak somewhere in the intake manifold that seals up once warm. Or a leaky injector which fouls the plugs as the car sits. Is your oil level higher than usual by any chance? (suggesting fuel contamination).
Also you could have a faulty idle air control valve. Surging might be caused by that. You can scan the car's computer for trouble codes to indicate this possibility.
Just throwing out blind thoughts here, without a car in front of me.
Oh yeah, you should use 91 octane, but I don't think this would cause a rough idle that clears up.
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- #679 of 751
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Re: My 1998 740il idles rough, and surges [Mr_Shiftright]
by dougmc
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Jun 01, 2009 (4:47 pm)
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Replying to: Mr_Shiftright (Jun 01, 2009 6:04 am)
Thank you for your interest. I installed a new air intake sensor that the previous owner had given me, and that cleared it all up just about 99%. Surge is gone as is the rough idle. Now it just occasionally dies at idle. I will run 91 octane from now on, too. Thanks very much.
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- #680 of 751
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Re: My 1998 740il idles rough, and surges [dougmc]
by Mr_Shiftright HOST
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Jun 01, 2009 (6:22 pm)
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Replying to: dougmc (Jun 01, 2009 4:47 pm)
Hmmm....don't know what that is. You mean a Mass Air Flow Sensor? There are two of them. I wonder if you had a vacuum leak after all....oh well, no matter. If it's fixed, it's fixed!
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- #681 of 751
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Resetting after oil change?
by wishmeluck
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Jun 08, 2009 (6:39 am)
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I am not able to find in my owners manual how to reset my service indicator after I do an oil change. Does a cert. tech. have to reset it? Thanks. Mr. Luck
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- #682 of 751
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Re: Resetting after oil change? [wishmeluck]
by Mr_Shiftright HOST
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Jun 08, 2009 (7:09 am)
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Replying to: wishmeluck (Jun 08, 2009 6:39 am)
Tell us the year and model and we'll try to find that out for you.
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- #683 of 751
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Re: Resetting after oil change? [Mr_Shiftright]
by jimijakkk
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Jun 08, 2009 (7:43 am)
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Replying to: Mr_Shiftright (Jun 08, 2009 7:09 am)
i have a 1996 740IL. the reset mechanism is part of the dash settings, like setting the time or date. i forget the exact sequence but, if you search until you see "days left oil change" (or words to that effect) that where you reset the days. i reset to 100 days. hope this helps.
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- #684 of 751
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Re: Resetting after oil change? [Mr_Shiftright]
by wishmeluck
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Jun 08, 2009 (8:02 am)
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Replying to: Mr_Shiftright (Jun 08, 2009 7:09 am)
My car in question is a '94 740i and it has 198K on it. They'll be more ?'s on this 'interesting' car. Like this '?' What syn. oil do you like, or what syn. oil should I avoid? Mr. Luck
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- #685 of 751
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Re: Resetting after oil change? [wishmeluck]
by Mr_Shiftright HOST
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Jun 08, 2009 (8:30 am)
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Replying to: wishmeluck (Jun 08, 2009 8:02 am)
You're going to need a service reset tool I'm afraid.
Here's one I found on eBay:
RESET TOOL
As for synthetic oil, I use Mobil 1 and I think that's fine for your application.
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- #686 of 751
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Re: Resetting after oil change? [Mr_Shiftright]
by wishmeluck
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Jun 09, 2009 (5:33 am)
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Replying to: Mr_Shiftright (Jun 08, 2009 8:30 am)
Thanks for the link. Soooo, every 8,000 miles I'll be able to use this 25 dollar device! And I'll bet that is peanuts compared to what the up-coming problems are.
Mr. Luck
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- #687 of 751
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Re: Resetting after oil change? [wishmeluck]
by Mr_Shiftright HOST
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Jun 09, 2009 (9:11 am)
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Replying to: wishmeluck (Jun 09, 2009 5:33 am)
Well cross your fingers. The car must have had decent care or it would never have reached that mileage! As for the reset tool, that pays for itself first time you use it.
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