Air fuel ratio's at different throttle positions

Originally Posted by Berlin

Go to Malton, Tell Paul the above and he'll fix it for you. He's a very clever man.
He'll also explain everything to you in as much detail as you can handle

(Im assuming you have a PC fitted of course)

C

I dont have one fitted atm but I have one.

I contacted paul a little while back and he can do me a dual map (map each cylinder) I just need to finish one last thing off before I go for it...

I just want to be sure that the problem is a potential A/F issue and not another problem in there.

I have done some more searching and found a site (ill link it when I get home) which says that both lean and rich can cause similar "searching/pulsing/surging/" at constant throttle.

Taa anyways

[yorkie_chris]

No, you have 3d map. Revs, throttle position, load.

With no load you might as well rev it on sidestand. You need to load it up to a cruising load, maybe 25bhp and see what AF is.

You have that many things different on your engine I bet map needs a tweak. Those CO pots are meant for idle adjustment, you are using them to affect pickup, that should be accel enrichment part of map.

Its an after market Eprom in there to help with things and they are generally very well regarded among users. I suppose it could just disagree with what I currently have on though.

One thing that throws me is that some times it feels ok and others it feels horrible... Like this morning to work it was ok, the way back from work it felt lumpy and inaccurate. I think thats the main reason I havnt gone down the PC3 route...

Can PC3's be used to sort out low rev's, I read somewhere something that said that below 3k you cant use a PC3... Sounds wrong to me like but who knows.

Ill have a good look and try and find the original Eprom, maybe that will give me some clue as to what is going on.

Any more idea's them please share them.

[yorkie_chris]

Intermittent problem suggests to me (if conditions are similar. Ambient temps?) that there is some problem rather than a tuning issue.

Originally Posted by yorkie_chris

Intermittent problem suggests to me (if conditions are similar. Ambient temps?) that there is some problem rather than a tuning issue.

Indeed, thats what I kinda think... its partly why I havnt gone in a particular direction. Thing is its always the bottom end that it effects with the constant or small openings, faster engine speeds and more open throttle always feels bang on. It does seem to change with weather but tbh it could well just be me, you know, different moods and riding differently , using the engine different, could just make the problem more apparent, and perhaps the problem is consistent, its just me that isnt.

I have tested and even changed out ECU, TPS, TB's, MAP sensor... Im not sure what else it might be really. (Thankfully all for about £60 thanks to ebay, none have had any major effect so I now have lots of spares ha ha) Tested temp sensors and they check out, might just spend a few pennies on flee bay and change those as well just to be sure.

Not sure what else... Hard to tell if it is as I say, fuelling and my mood/riding or inconsistent issue. Im tempted to just get PC3 setup and see, but if its a fault its basically £150 for nothing

[yorkie_chris]

Well you have to deliberately try and cause the issue consistently. Does making the lot a bit richer with the TPS change it?

Well I set the tps to 0 on dash (which is what ecu thinks is right). What I have tested is the co pits as I mentioned, when its was richer it did seem to run worse, which is why I figured it was rich running issues I'm having.

Unfortunately (or fortunately?) I'm off on hols for 2 weeks so will have to leave it. When I get back ill try putting the co's back to standard and play with tps either way of right and see what effect is.

Originally Posted by ThEGr33k

One thing that throws me is that some times it feels ok and others it feels horrible... Like this morning to work it was ok, the way back from work it felt lumpy and inaccurate. I think thats the main reason I havnt gone down the PC3 route...

Can PC3's be used to sort out low rev's, I read somewhere something that said that below 3k you cant use a PC3... Sounds wrong to me like but who knows.
.

Nick, Thats exactly what a PC3 is for.

Depending on whether you have a PC3 or PC5 you can set it up every 500 revs across the rev range from tick over (every 250 if its the PC5). Paul will also set it up at 5%, 10% 20% 40%, 60% 80% and 100% throttle at each point under static load. He'll then tweak it for increasing load.

Stick your PC on, take it to Paul and it'll be a different bike. Paul will fit it if you can't.
It'll be £140 well spent.
C

Will do that Berlin man. I have to make sure its all ok with insurance...

[yorkie_chris]

If they're OK with the mods you already have, I can't see them being too fussed!