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Re: [ST] '00 RS Running Rough - Resolved
- Subject: Re: [ST] '00 RS Running Rough - Resolved
- From: Kevin Kimick <kkimick@xxxxxxxxxxxxxxxxxxx>
- Date: Tue, 05 Sep 2006 23:00:41 -0600
Found it.
Thanks Neil
Kevin
Neil Lindsey wrote:
> I have an old shop manual ('99/'00 Sprint), but it is shown there so I have
> no reason to doubt that it would be in the newer manual
>
> The coolant temp sensor is shown on the electrical schematic, and it's
> location is shown in the Cylinder Head section
>
> HTH,
> Neil
>
>
> ----- Original Message -----
> From: "Kevin Kimick" <kkimick@xxxxxxxxxxxxxxxxxxx>
> To: <ST@xxxxxxxxxxxxxx>
> Cc: <st@xxxxxxxxxxxxxxxxxxxx>
> Sent: Tuesday, September 05, 2006 7:41 PM
> Subject: Re: [ST] '00 RS Running Rough - Resolved
>
>
>
>> I can't find any coolant temp sensor in my service manual for 2002-2004
>> Sprint ST/RS.
>>
>> Kevin
>>
>> Don Cummings wrote:
>>
>>> Just wanted to share my experience. After a new tune and CO reset, my
>>> bike had stopped stalling, but was still running a bit rough, stumbling
>>> at constant/light throttle.
>>>
>>> Turned out the coolant temp sensor was bad. My guess is it was reading
>>> cold all the time, making the engine run rich, which was why at wide
>>> open throttle, the bike went great, but when hot, at constant light
>>> throttle, it was loading up on fuel and causing a bit of
>>> popping/stuttering.
>>>
>>> Now the bike runs great!
>>>
>>> BTW, there was no code stored for the faulty sensor.
>>>
>>> Don
>>>
>>>
>>> ______________________________
>>> Don Cummings
>>> Vice President
>>> ZyMac, Inc.
>>> www.zymac.com
>>> W: (603) 537-0400 x.103
>>> M: (603) 759-7361
>>>
>>>
>>> -----Original Message-----
>>> From: Jonathan West [mailto:triumphnutter@xxxxxxxxx]
>>> Sent: Tuesday, August 22, 2006 8:44 PM
>>> To: st@xxxxxxxxxxxxxxxxxxxx
>>> Subject: Re: [ST] st Digest, Vol 17, Issue 34
>>>
>>> Hi Don,
>>> Go back to the dealer and have them do 3 things if they haven't already.
>>> 1)Reset the IAC valve.
>>> 2)Reset the closed throttle position.
>>> 3)Set the CO (not the CO2) to 3%-4%.
>>> They should have done all this if they updated your tune, but a lot of
>>> them don't. Great Bay has an excellent reputation, but just make sure
>>> they did all that. All these things must be done with the Game Boy and
>>> a gas analyzer. If they don't have a gas analyzer, find another dealer
>>> that does.
>>>
>>> If it still does it, check the 3 corrugated vacuum lines that are
>>> attached to the IAC valve (otherwises known as the stepper motor) for
>>> leaks. They were notorious for cracking.
>>>
>>> Good Luck,
>>> Jonathan West
>>> 95 Trophy 4
>>> 96 Super III
>>> 97 Trophy 900
>>> 99 ST
>>> 01 Daytona 955i
>>> 03 Speed 4
>>>
>>> From: "Don Cummings" <dcummings@xxxxxxxxx>
>>> Subject: [ST] '00 Sprint RS running rough, service issues
>>>
>>>
>>> Hey Everyone,
>>>
>>> My Sprint RS started to run rough, occasional stalling when idling and
>>> seemed to be "lurching" a bit when at slow role on of throttle or at
>>> constant throttle.....like the engine wanted to go, but then would pull
>>> back and go again.
>>>
>>> I brought it to Great Bay in Hampton. I told them what was going on.
>>> All they ended up doing was a CO2 check and downloaded a new tune.
>>>
>>> The stalling is gone, but it starts hard when cold and still
>>> "burbles/stumbles" when in traffic accelerating moderately or at
>>> constant throttle, especially noticeable in first or second gear.
>>>
>>> I also seem to notice a fuel smell, which makes me wonder if the bike is
>>> running rich. Almost as if the choke is stuck open on a carbureted
>>> bike.
>>>
>>> So I'm bringing it back in today. The bike has new plugs and had a full
>>> service/valves done 5k miles ago. I've also run several bottles of
>>> Techron through and cleaned the throttle body.
>>>
>>> My guess is that either ignition timing is off, or some kind of sensor
>>> is out of calibration/going bad, possibly making the bike run rich. In
>>> cars with mass air flow sensors, I've seen them go bad without throwing
>>> an engine code while giving the car symptoms as if the fuel pump were
>>> going bad.
>>>
>>> Any suggestions on what I should make sure Great Bay does?
>>>
>>> Thanks,
>>> Don
>>>
>>>
>>>
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>>>
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