01 900ie Rough/surging engine when at cruising rpm

[koko64]

Be interesting to see what the AFR is in that rev range.

[jjake]

I have also problems with my 900 ie, sometimes it stalls and clicking(knock) sound before it misfires, feels like one misfire and then runs great again. Is it coils?
Idles fine, before it was runnig great. Sparks changed with 0,7 gap, wires checked.
thanks for replys

[silas]

Check the regulator/ rectifier wiring where it connects into main harness. My '98 900 burnt these wires & connectors and it had hesitancy/ hiccups at idle and 3-4k rpm's. Replaced burnt connectors and wire portions there, no more issues.

[jjake]

wires were ok, connectors one pin was corrosioned, cleaned that and on short test ride bike was runnig better. Need more testing to see if problem was on the regulator connection.

[jjake]

Hiccups occured again on longer test drive, and bike almost stalls, so problem was'nt fixed. Maybe one of the coil is going to break, I measured coils earlier and coils were ok, cois are pretty expensive to replace if the problem is something else. Any morre ideas to test?

[Speeddog]

Connectors at coils a nice snug fit, not loose?

[jjake]

Coil connectors checked and I shorten coil wires on both ends 5mm for new/better connection on plug caps.

[jjake]

I ordered and changed California cycleworks coil kit, coils wires plugs and caps. Plug was on the kit NGK DR9EA with 0.6mm gap. Problem wasn't solved, still  hicups, stalling. Runnig smoother on new coils so money wasn't totally wasted.
I remember that the problem was before open airbox mod and K&N filter, so that can't cause this? Also tested without powercommander, almost every wire connection cleaned. Any more ideas to test?

[koko64]

Was the PC tuned for an open airbox? Does the miss sound like it is spitting back into the airbox?

[jjake]

I used map from commander site and tested few other maps, same settings on the map. Sounds like it comes from misfire on the horizontal cylinder, but hard to tell. Tested without commander, maybe I should test to tape cover back to the airbox and disconnect commander, what it tells if spitting on the airbox? It also stalls on idle sometimes on traffic lights. Plugs looked clean and good, not oily.

[koko64]

Spitting into the airbox (particularly when its cold and the motor is cold) usually means running lean. My bros M900ie (01 model), actually ran rich down low and at idle.  Until we set all the parameters, synched the TBs and played with the throttle bleeds it had a rough fluffy idle. In your case the surging could be lean induced, so try a stock airbox lid and see if it improves (or gets worse). Then you'll know which way to go.
I have also learned that others maps rarely work, unless you are lucky. My bro tried a few maps until he got lucky. We noted the map that worked best and eliminated his symptoms had less fuel down low. In your case it could be lean. So tape up or fit a stock airbox lid to get direction. Dyno time could be in your future.

[jjake]

I'll test other maps and closing airbox. Hope this will fix problems, riding continues on spring cause weather is so cold here, so thanks for tips.

[DarkMonster620]

IMHO, you should check TPS setting, if it quits at times on stop lights, it might be that the TPS is at 0° when slightly open and -1° when idling, just numbers to make it a "little more" clear . . .

TPS for your bike should be, according to Brad Black's papers:

M900ie 404mV  2.4°

There was a service bulletin issued for the 900Mie in '00 sometime that revised the TPS idle setting by voltage (not degrees) to 472mV. This corresponds to about 3.1 degrees. As far as I can remember, we ignored this pretty much and kept using 2.4 degrees.

Now, if you have a IAW59M or IAW5.9M[same ECU] then:

900Mie 462mV 2.95°
900Mie '02      3.68°

Now, I will try to link you the tech paper  . . Now, question, do you have an electronic diagnostic tool?

edit:

Here is the link to the HOW TO

And a link to a diagnostic tool:  http://technoresearch.com/index.php/products/for-single-user/alaris

[koko64]

We used that procedure for my bros M900ie.
Very informative article.

[DarkMonster620]

just basics koko . . . if he has no tool, no can do . . .

went back to read the first few posts . . he has a IAW59M . . . so he is running like an '02 . . . that said, he has a PC3 trying to compensate, IF his trim is too lean, no matter what, the PC3 will NOT be able to compensate the lack of fuel the ECU is sending . . . Thing is, is the ECU re-flashed for a 900

For his setup: airbox and shortened exhaust, his trim should be around 23~24 and CO combined should be between 3.5~4.5%. . .

Goggles, this info is a guideline . . . We need to know what dealer said . . .