Date: Mon, 15 Aug 2005 17:56:55 GMT
From: Paul Halliday <>
Subject: Re: Idling at 450rpm

in article, at wrote on 15/08/2005 18:27: > At 2am this morning, doing 40mph through some roadworks on the M1 > (Interstate to you american folks!) the "Check Engine" light came on. > It was accompanied by the cruise control turning itself off, and a > little loss (only just noticeable) in power. When I pulled over to > gather my thoughts, I noticed it idled very lumpy indeed, at 450rpm! I > eventually drove it 80 miles home at 1800rpm (damn it took a long > time). Yuk! Sounds like a vac pipe might have popped off. What car do you have? I know the M1 ... There's certainly a few of your countrymen here, but yes, our "little" M1 could be called an interstate :) ... Just a thought ... Your oil filler cap is on nice and tight, right? > I've checked the DI unit by swapping one in from another car and it > made no difference so I suspect something else. When I switch the > ignition on, I get 9 loud ticks (like a relay), then a quick whirr from > what I suspect is the stepper motor. I thought the stepper motor > always did that when you turned on the ignition? DI? Okay, so not a C900, unless you've retro-fitted the good stuff :) The clicks/ticks could be the APC solenoid, or perhaps just aircon clicks that you might not have noticed before. > Anyway, any ideas what this could be, or any diagnosis/trouble-shooting > I can do which might save me a hefty garage bill? Check over all your air pipes. An overtight jubilee clip might have sheared one of the larger pipes, or one of that smaller ones might have rubbed a hole ... Or just popped off. Check them out first. What year/model do you have? Hopefully someone with the same car will be able to home in on more specific information. Paul 1989 900 Turbo S

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