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It probably is a combination of idle co and lower section of map. What is the tps sitting at at idle? if it anything above zero it is using the map for idle. The co correction and idle correction are just random numbers and don’t mean actual co, you would need a gas analyser to check it. i Had a similar issue on one map so just stick with the other.
 

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Give it a go. The ideal setup relies on many factors butterfly opening, bypass screws, idle co and a functioning stepper motor, I haven’t found a perfect sequence for this. Was it working ok once? If so has anything changed?
 

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The ECU should be controlling the idle speed. It shouldn't be set with the stops or any leakage past the butterflies.
If the throttles are properly synchronised, the idle mixture is set so that the engine idles smoothly and the stepper is set at the correct # steps for the ECU type, the stalling will be minimised. It can be further minimised by adjusting the idle speed in the map from 1200 to 1250 or even 1300, and the idle mixture set slightly rich.
Have a look here for a sync procedure that works for me, be aware though, that this is for a Sagem ECU. Walbros control their steppers slightly differently, so consult your workshop manual.
 

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.. can TuneECU tell me if the throttles are in sync or do i need to delve under there. At the moment if i slacken off the cable adjuster the bike idles, just, at around 950rpm but tends to be erratic . Do i set this on adjustments where it says target rpm or on the actual mapping.
TuneECU can't tell you if the throttles are in sync. You need to remove the airbox and get your hands dirty.

950 is WAY too low. Are you sure the stepper is even working?

In order to raise the idle speed you need to download the map from the ECU, edit the idle map & upload it. Don't do anything until you get the engine running properly though.
 

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.. why is it not good practice to adjust via the knob adjuster thereby leaving the butterflies open a little.
If the butterflies are open even slightly during tuning, the ECU won't be fully in control. Once its tuned, use it at your leisure, but I don't see why you would need it if it is tuned correctly.

The Tornado doesn't need (or have) the manual adjuster. If you want it to have a higher idle speed, simply edit the map. You'd only want to do that if stalling is a problem, and you haven't been able to tune it out.
 

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Discussion Starter · #12 ·
I've recently had it mapped and it's not bad apart from the idling, i've set the idle screw as a temporary measure for now ,reason being all this stalling and pressing the starter has caused a change in tack in my head of worries. Because the starter sometimes sticks i am now going to do what i've been putting off far too long and that is check the z25 business . So grab a coffee ,get comfy in your lazyboy and get ready to have a good laugh at a total newb in unchartered territories. See some of you in the next post if you haven't already given up on me
 

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Discussion Starter · #15 ·
You're not forgotten, i haven't delved under there yet as I've been busy on my vw van which had no heaters so that took priority.
I've adjusted the tickover at the cable on the left of the engine for now, it settles at about 1700rpm, a little high but stops it from cutting out. I also checked the z25, i didn't remove it, I'm guessing it's been done as i showed in the other thread, replaced the washer and bolt and alternator rubbers.
Next mod is the fitting of a pair of deep tone horns.
 

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Discussion Starter · #17 ·
engine cut out while coasting yesterday and showed the K orange warning light , which has now cleared . I'd been for a 90m ride and the bike was running great, it was hard to start after it had cut out . I plugged into tunecu and the stepper motor shows 18 cold and 3 at fully warmed up 99 degrees , it's idling nicely but too low at approx 1000rpm. I,ve got a new stepper on the way which may be the problem.
What is the 2 pin tunecu connector for? I switched all off and connected the 2 pin and turned on again but the K orange light came on and the bike would not turn over, nor could i hear the fuel pump prime or the stepper start up. It wouldn't even connect to ecu with the 2 pin attached? No error codes are showing So i assume the stepper should be at zero when warm?
 
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