[Author Index] [Date Index] [Thread Index]
[Date Prev][Date Next][Thread Prev][Thread Next]

Re: [ST] st Digest, Vol 26, Issue 3



Message: 2
Date: Thu, 03 May 2007 07:06:17 -0700
From: Al Garvin <agarvin@xxxxxxxxxx>
Subject: Re: [ST] Engine Dying
To: ST@xxxxxxxxxxxxxx
Message-ID: <4639EC59.8040302@xxxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

David,
    I have had this sort of thing happen twice in 60K miles on my 2000 
ST. Once it happened at a gas station as I had stopped to fill my tank 
and for some reason I had to move to another pump, so I started the bike 
  and immediately dropped it into gear and then stalled it. After 
filling up the bike would not idle. I rode it several miles stopping at 
lights with it dieing. Took it out on a freeway and ran in several miles 
and then pulled over. It died and after about 3 minutes I restarted it 
and it ran fine. I attribute this to the throttle body sensor getting 
out of step with the ECU and it taking some time for the ECU to 
recalculate its position. The second time it happened, an new problem 
had developed in that it would idle at 1200 rpm with the clutch in at a 
light, but would jump to 1800-2000 rpm it it shifted into neutral. The 
bike died on me as I was coasting to a stop at an inspection station a 
couple of times. I took it to the Dealer and had the O2 checked and set. 
Never found out of it was out of spec, and also had the sport bike tune 
checked. I have a Power Max exhaust on it. After coming back from the 
dealers the idle problem is still there but it has not died at anytime 
since unless I shut it off. I alway use the ignition key to stop it and 
never the kill switch. I have heard that using the kill switch does not 
give the ECU enough time to make note of the current throttle body 
position and to take other readings before it stops.
Al


I checked all the FI related wiring and all seems well.  I have two new things to check, the fuses, to make sure there's no intermittant crap in their, and the ECU.  Like you state, it looks like an ECU issue.  The battery was out for two weeks while I performed the service and fixed some little problems, so maybe it needs to be reset.  I'll look into that.
Like you, I always use the key to shut down, never the killl switch.

Is there not a user-servicable ECU reset proceedure?  I know the engine light will stay on for three start cycles.  btw, my check engine light never comes on, until the bike dies.  

I rode it about 25 miles today, and some clarity and another issue emerged.  Twice, right before the engine died, so did the tach.  Once idling in my garage just after I got it buttoned back up from checking all the fuel tank wiring, and then on my way to work the tach quit and it immediately died when I let off the throttle.  (It ran fine for about a 1/4 mile without the tach)
It also seems to happen nearly always at idle. Yesterday it stumbled twice under power, today once.  But it rarely will idle more than a minute without stalling.

Date: Thu, 3 May 2007 07:28:46 -0700
From: "Young, Mike" <myoung@xxxxxxxxxxx>
Subject: Re: [ST] Engine Dying
To: <ST@xxxxxxxxxxxxxx>
Message-ID:
        <31E0227765EA394A924D4A0122FFE172989DD7@xxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain;       charset="US-ASCII"

I had a bit of an issue with my '06 at about 2,000 miles where the kick
stand switch went a little iffy on me. It was pretty obviously the
problem because the engine would quit on one especially rough patch of
roadway that I cross almost every time I ride. I pulled the switch off,
cleaned everything in the area, and re-installed it and the problem
hasn't been back. 



I gave that a good check today.  All seems well.  Once again, it rarely happens underway, always at idle.  It seemed to have quit after I sprayed the switch with contact cleaner, but it came back as soon as I started riding.

Thanks,

David
_______________________________________________
Triumph Sprint ST/RS mailing list
Send list posts to ST@xxxxxxxxxxxxxx
Change your list options at www.Triumphnet.com