s2r1k acting strange

Punx Clever · February 08, 2009, 10:32:35 AM

Anyone with an S2r1k or bike with equivilent sensor (would assume all FI bikes probably have that same sensor) want to get a resistance measurement for somehwere around 50 degrees? I'm thinking it would have to be a LONG way off, so even like a 60* garage would be great.

Punx Clever · February 09, 2009, 01:49:29 PM

Quote from: Punx Clever on February 08, 2009, 10:32:35 AM
Anyone with an S2r1k or bike with equivilent sensor (would assume all FI bikes probably have that same sensor) want to get a resistance measurement for somehwere around 50 degrees? I'm thinking it would have to be a LONG way off, so even like a 60* garage would be great.

Ok, so I forced the sensor to output the *correct* ressistance for the temperature. Check engine light just came on. Problem still exists. So not hte temp sender... maybee the pressure function of the unit, but I can't check that.

So I'm gonna put the cans back on and see if that solves anything.

If not, a trip to indy will solve everything. But will cost effing money... grr

bazz20 · February 09, 2009, 03:28:29 PM

have you changed you fuel fiter

Punx Clever · February 09, 2009, 05:46:17 PM

It's a possibility, but it doesn't feel like a fuel filter issue... A little too sudden and under had acceleration it happens at higher RPM's, when if it was the filter it should happen sooner at harder acc

bazz20 · February 09, 2009, 09:17:39 PM

its either that or your ecu shit its self cause if any of the censors are faulty the engine light would be on

wheezer · February 09, 2009, 10:38:03 PM

I had an issue with the girlfriend's 620 which lost power and stalled every time it rev'd past 2500rpm. It turned out that the fuel line was pinched between the tank and the frame and the engine was starved of fuel as the revs increased.

Punx Clever · February 10, 2009, 08:44:30 AM

Not the fuel filter... new one in, no difference.

Gus Duc · February 11, 2009, 05:04:10 PM

Try unhooking the O2 sensor & resetting the ECU by unhooking the neg. terminal on the battery. You'll get a check engine light from the O2 sensor but it should run fine & eliminate one variable. You can try it with the O2 sensor still installed too but my bike always ran better after an ECU reset when I was running the OEM ECU.

Punx Clever · February 12, 2009, 11:42:08 AM

Quote from: Gus Duc on February 11, 2009, 05:04:10 PM
Try unhooking the O2 sensor & resetting the ECU by unhooking the neg. terminal on the battery. You'll get a check engine light from the O2 sensor but it should run fine & eliminate one variable. You can try it with the O2 sensor still installed too but my bike always ran better after an ECU reset when I was running the OEM ECU.

I'm not sure why I think this, but isn't there a point in the ECU map where the O2 sensor gets ignored? Like at a certain set of RPM's/throttle positions?

When I say the bike bogs down, I mean it REALLY bogs down. Not just reduced acceleration, but a little bit of engine braking.

Oh well, I'm headed down to indy tomorrow and am gonna have the valve guides checked out

Howie · February 12, 2009, 02:01:57 PM

Quote from: Punx Clever on February 12, 2009, 11:42:08 AM
I'm not sure why I think this, but isn't there a point in the ECU map where the O2 sensor gets ignored? Like at a certain set of RPM's/throttle positions?

When I say the bike bogs down, I mean it REALLY bogs down. Not just reduced acceleration, but a little bit of engine braking.

Oh well, I'm headed down to indy tomorrow and am gonna have the valve guides checked out

The bike goes into open loop about where you are having the problem. You are on the right track. When you go to the dealer, just describe the problem. Diagnosis is their job.

Punx Clever · February 12, 2009, 03:56:38 PM

Quote from: howie on February 12, 2009, 02:01:57 PM
The bike goes into open loop about where you are having the problem. You are on the right track. When you go to the dealer, just describe the problem. Diagnosis is their job.

Which means it's taking readings from the Temp/Pressure and throttle position sensors to calculate Fuel mix correct? Since the bike runs just fine up until then, O2 isn't the problem (as verified by trying the advice above with no changes).

I know diagnosis is their job, but damnit man I'm an engineer! I wanna know!

ducpainter · February 12, 2009, 04:04:16 PM

Quote from: Punx Clever on February 12, 2009, 03:56:38 PM
<snip> but damnit man I'm an engineer! I wanna know!

What kinda train?

Speeddog · February 12, 2009, 05:09:46 PM

Quote from: ducpainter on February 12, 2009, 04:04:16 PM
What kinda train?

BaaaHaaaHaaaa

Howie · February 12, 2009, 06:09:51 PM

Quote from: Punx Clever on February 12, 2009, 03:56:38 PM
Which means it's taking readings from the Temp/Pressure and throttle position sensors to calculate Fuel mix correct? Since the bike runs just fine up until then, O2 isn't the problem (as verified by trying the advice above with no changes).

I know diagnosis is their job, but damnit man I'm an engineer! I wanna know!

Correct. The reason I said let them do the diagnosis is whatever you tell them to do, like check the valve adjustment, you can be billed for whether it fixes the problem or not. You definitely need to know what was wrong and should be informed of everything they do.

Gus Duc · February 12, 2009, 07:42:12 PM

Quote from: Punx Clever on February 12, 2009, 03:56:38 PM
Which means it's taking readings from the Temp/Pressure and throttle position sensors to calculate Fuel mix correct? Since the bike runs just fine up until then, O2 isn't the problem (as verified by trying the advice above with no changes).

I know diagnosis is their job, but damnit man I'm an engineer! I wanna know!

I thought engineers rode BMW's

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s2r1k acting strange

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