Not Running to healthy

[Tony C]

right think found the idle prob, looks like something to do with one or more of the terminals in the plug(s) at the ecu end,
Rob how much to send me a set of terminals mate so i can redo the ecu plugs, i can't find the other set i had from you mate , i looked on the vems shop and can't see them on there.
took the car for a road test and yup its was fun, in the rain was even more fun,
here's a vid of her

http://media.putfile.com/Second-Fire-up-of-stg3-v8

[Tony C]

i tried something tonight,
i loaded the old map we did with firmware 1.0.69 and the car ran better,
i gather that is on the old calibration settings too Rob?
also i had idle control again.

regarding idle control (maybe one for dnb), when you start calibrating the stepper, should it go in then out or out then into the middle? when you turn the ignition on without starting.

Idle Kpa mines around 50-55kpa is that ok to run with map control? or should i be looking at alpha n at idle?

sorry for the questions guys, but there is light at the end of the tunnel

[rob@vems.co.uk]

If those settings work okay stick with them for the time being.

I'd run AlphaN all the time now you've got those cams

Rob

[Tony C]

what run alpha n instead of the map sensor for idle
or from idle to full throttle mate?.

i gather i need to fill out a table somewhere with some values then,

[rob@vems.co.uk]

Converting to alphaN is here:
http://www.vems.co.uk/forum/index.php?topic=93.0

Disconnect the MAP sensor so that its not reading the vacuum in the manifold and use it for barometric compensation - or keep the MAP and use the Speed Density/AlphaN blending.

Its really a case of experimenting with the setups to see what works best for you.

[Tony C]

well couldn't get her to idle or anything on alpha n
so had a play with the settings,
god knows what i have changed but she idles now back on map and she is running sweet and not rich at all, went for a drive and she was crisp and sharp, i have had to drop my accel enrich down as it was lighting all the red lights up in MT at WOT and it bogged a bit,
pulls a bit better now and seems to be running as per the VE table on closed loop.
what should i be aming for under accel enrich at WOT
still needs tweaking, but im proud of myself that i never gave up and got her running, and to take for another drive,
have a hot start prob though now, it fires revs pick up then she dies, if you catch her on the throttle briefly she will idle ok,
not sure how the cold start is going to be though as we never got this sorted, i will find out in the morning as im that confident in my mapping im taking the car to work  

[dnb]

I struggled with idle on alphaN, but I only looked at it for a little while before I took the Griff off the road.  Engine is built and back in the car now, so shouldn't be long!

WOT lambda should be approx 0.86  The aim is for it to go straight there, hence the need to throw fuel in as soon as the accelerator is touched.  (The map itself will get the lambda to 0.86 eventually anyway, but instant is what is really wanted here)    I don't remember my settings. but the values were quite small in the end.

As for the starting - it sounds like yours is behaving like mine did.  It's a case of getting the % increase vs temperature on starting correct now.  Only make small changes to it each time, and you'll soon get there.   The settings to look at are the temperature compensation table and the after-start enrichment.  I believe both of these are a percentage multiplier on the fuelling table, and both get applied during starting, and only the temperature one gets applied when warming up. 

[Tony C]

I have here a datalog of start up from cold, and after start from cold and afterstart when hot if anyone wants to have a look and give me some pointers,
also i defo think my stepper is not config correctly, or something has gone a miss as when i used to start from hot the revs would climb then die dow to aid idle but now they dont,
have the latest .msq here also if any one wants to see where i may be going wrong,

otherwise ran sweet to work and back, just needs hot and cold start sorting now, which maybe down to a stepper fault, (have tried two different ones with same thing.)

[Tony C]

here we go:
http://www.v-8.org.uk/zipfiles/tonyv8new.zip

there are the 3 datalogs along with current .msq file.

[dnb]

Re stepper - it should move the pin out then in when you turn the key.  If yours moves in then out, then the config is backwards!

[Tony C]

ok i need to change that then, mine been like that for ages 
would that mean fully open would be 100? or 255??? or 0 

[dnb]

Mine was like that for ages too!  I don't remember what fully open was, bu I think it was something odd like 68...

[Tony C]

Cheers dave, will have a play later today,

[Tony C]

any one got an easy way of setting up a stepper?
as in what values to put where for testing,
does the stepper reference table need settings along with postion while cranking at -40 and 77?
as mines doing werid things and want to make sure i have the settings correct in a few places before i go any further.
the stepper worked fine on the old firmware version

also:
extras-> idle settings general.
what should iac follows tps when not idle be at?, should that be enabled or disabled?

[Tony C]

well been out for another number crunching session and now seems to be behaving its self,
also when a load is added on the engine, i could be mistaken but im sure the revs now pick up and goes back to idle then compensates again when load is removed,

im enjoying this tuning a bit more now
MOT next weekend so fingers crossed i dont break her before then

will see if i got the cold start side of things working in the morning