Re: [ST] Sooty suggestions?

["Chris Harwood" <chris@xxxxxxxxxxxxxxxxxx>]

Hi Richard

I have seen it do a 'down to the bottom and back to somewhere' check on
switch-on.  There's no positional feedback so it relies on assuming that
each pulse-set results in a one-step movement.

I guess the ECU may bang it into the endstop to ensure it knows where it
is!

Chris Harwood
00 RS
Chris Harwood
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>>> antait@xxxxxxxxxxxxxxxx 07/20/07 13:37 PM >>>
Hi Rich,

Masiak, Richard wrote:
> Have you tried checking/cleaning the idle air intake stepper motor? 
Sounds like a very similaar problem I had with my RS.  Turns out my air
intake idle plunger was severly sooted and would not adjust properly for
idle air intake.  Once I took it off/apart and cleaned it with 90%
rubbing alcohol using a cute tip, everything was back to the way it
should be.

I took it out last night and like you said it was sooty, especially the 
side with the four vents at the FI side.

Do you know if I should see it move up and down when I switch the 
ignition on?  Does it do some kind of position resetting thing?

Oh, thanks for all the replies on and off list.  Fingers crossed that 
I'll have a smoooth ST again for the weekend :o)

Cheers,

Andrew

> Rich
> 
> -----Original Message-----
> From: st-bounces@xxxxxxxxxxxxxxxxxxxx
> [mailto:st-bounces@xxxxxxxxxxxxxxxxxxxx]On Behalf Of Al Garvin
> Sent: Wednesday, July 18, 2007 4:40 PM
> To: ST@xxxxxxxxxxxxxx
> Subject: Re: [ST] Sooty suggestions?
> 
> 
> Andrew,
>    Replace all three plugs with new ones! You could have a fouled
plug.
> We spent about 4 months changing everything out on my sons 402 cu
small 
> block with fuel injection. And I mean everything. Could not get it to 
> run right. Finally we changed out the (new) plugs and that solved the 
> problem.
> Al
> 
> Andrew Tait wrote:
>> Hi all,
>>
>> I've been musing over a little problem with my '00 ST.  About 6 weeks

>> ago I changed the plugs, and ever since then it has been very grumbly
at 
>> idle, even to the point of cutting out.  It doesn't start as nicely
as 
>> usual either, idles at around 800-900rpm, but seems to be otherwise 
>> perfect.  Accelerates smoothly and fuel consumption appears to be
normalish.
>>
>> At that time nothing else was changed, although since then I have 
>> changed the air filter.  The bike only has about 20K miles on it. 
>> Before I changed the plugs it was running beautifully.  Yeah, that'll

>> teach me!
>>
>> Anyway, this evening I stripped everything down again right down to 
>> taking out the new plugs and they are very sooty.  I think they've
done 
>> maybe 400 miles.  The gap is normal (0.8-0.9mm) on all 3 plugs. 
Before 
>> I (a) go mad and pull everything else to bits or (b) go mad and write

>> the dealer a blank cheque to look at it, whilst it's in pieces is
there 
>> anything specific I should be checking?  I've just checked the Haynes

>> manual and it says to check the connectors and wiring to the idle air

>> valve, so I'll do that tomorrow evening.  Anything else I should look
at?
>>
>> Thanks for any help!
>>
>> Andrew
>>
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