[ST] RE: ST-triumphnet.com Digest, Vol 5, Issue 19

["Bob Nixon" <bigrex@xxxxxxx>]

>----Original Message-----
>From: st-triumphnet.com-bounces@xxxxxxxxxxxxxxxxxxxx
>[mailto:st-triumphnet.com-bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of
>Shawn Mouser
>Sent: Thursday, August 11, 2005 12:28 PM
>To: st-triumphnet.com@xxxxxxxxxxxxxxxxxxxx
>Subject: [ST] Check engine - odd symptoms

>I'm hoping someone else might have had these symptoms on their bike and
>can impart some wisdom.

>I have an '02 ST with about 20K miles. An odd set of symptoms occurs
>when the bike gets hot. At exactly the moment the fan kicks in the fuel
>gauge goes dead (drops to empty), the fuel light comes on, and the
>"check engine" light illuminates. This has only happened in stop and go
>traffic and doesn't seem to be an overheating issue... the bike never
>overheats, the fan kicks on, the temp gauge stabalizes, there's no
>change in how the bike runs, eventually I get moving again and when the
>bike cools back down to it's normal operating temp, the fan kicks back
>off and the fuel gauge goes back to normal. Of course the engine light
>stays on until I go through three cycles (without the fan kicking on
>and sending an error code) and then the brain resets itself.

>I took the bike in once to my dealer since this started, but at the
>time I hadn't noticed all the symptoms... I just had an unexplained
>check engine light. The dealer basically reset it and said bring it
>back if it happens again (babbling some B.S. about how the battery
>might have gone weak/dead... which it hadn't). I'm hoping someone here
>has had a similar issue and might give me a heads up so I can point my
>ever so helpful dealership in the right direction.

Shawn my 01 Sprint ST does something similar but less severe. Here in
Arizona summer traffic, the fan kicks on and once in awhile & the fuel gauge
goes to empty and the low fuel light comes on. The problem goes away once I
get moving again and the radiator fan turns off. The poor ground thing
sounds plausible as the extra current drain with the fan on would cause a
higher voltage drop and may muck up the fuel sensor. With me, as little
metro riding, particularly during summer months, as I do, the problem is
predictable & non catastrophic, so I've been ignoring it for about 2 years
now. BTW, my 01 has 50K miles & was purchased new.


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