Target AFR tables

[MarioVelotta]

I added cold advance just to see if the car would drive better cold....seems to help somewhat but still stumbles a bit for a few blocks

What is your cold accel setting set to? Your probably adding to much more fuel in when you are still in the warmup cycle or more uncommon to little.

[1955cc66bug]

Cold accel enrichment is 3 ms, cold accel multiplyer is 130%

[panel]

Cold accel enrichment is 3 ms, cold accel multiplyer is 130%

Mine are at 100%=no Fuel and 0.0ms. This helped mine for sure!

[panel]

Is there no way to get your idle valve to work the way you want it to....even if it came down to throwing a toggle in there somewhere to cut the power to it after your engine is warm.

Not a bad idea? The way my valve seems to be set up and I've check with Matt Cramer (MS guy) is that I need it open @ 0% (or low%) when cold/cranking and then closed (100%) or semi closed when hot. But the PWM doesn't have this feature. I can set it up to be open/cranking at 0% but then when the motor is warmed up (the valve closes which is good) and then I restart the bus after a gas fill up lets say..........it goes back to the fully open setting like '0%' or low #'s like 30 etc and the it's like having the throttle stuck open and it's not needed.

[1955cc66bug]

So, when it has power to it, it's open right? (some are just the opposite) yeah, I think if you put a kill switch in line somewhere to the valve you could just kill it after warm up...kind of a band aid I know....there really should be some setting your missing though, I don't see why it would do that. Granted, I'm no expert LOL

And I will change those cold accel settings this morning and try it! I love these forums!

[MarioVelotta]

Panel, do you only have a 2 point table for the idle valve in the standard code? When I was running one my valve did not opperate from 0-100% duty it was more like 41%-65% before and after those values the valve did not work correctly and I had to find those values playing with the valve on the bench with the ms on a stim while I cranked clt temp up and down while I was blowing air through it.

Both of you should be running extra by now! Standard code leaves alot of loose ends.

[panel]

Panel, do you only have a 2 point table for the idle valve in the standard code? When I was running one my valve did not opperate from 0-100% duty it was more like 41%-65% before and after those values the valve did not work correctly and I had to find those values playing with the valve on the bench with the ms on a stim while I cranked clt temp up and down while I was blowing air through it.

Both of you should be running extra by now! Standard code leaves alot of loose ends.

This is like mine right now. Similar chart but I've smoothed the curve a little. The problem isn't in this graph though........it's in the idle settings like the frequency part and the cranking,retract part of the set up.

[MarioVelotta]

These where my settings,





Over 65 and it would re-open the valve.

[panel]

Here's mine.........works better when the cranking position is at '0'. But when the motor is hot it opens the valve right up and scales down to whatever the PW% might be at a certain CLT. 40% it works not bad when hot but the cold start suffers.

I wonder if a GM style IAC valve might work better

[typ4]

Is there no way to get your idle valve to work the way you want it to....even if it came down to throwing a toggle in there somewhere to cut the power to it after your engine is warm. I just think theres no way to get a cold engine idle very well any way you slice it. I have been trying to do the same without a valve with no luck. I added cold advance just to see if the car would drive better cold....seems to help somewhat but still stumbles a bit for a few blocks. But there's no way in hell it will idle not matter how much fuel or timing I throw at it. I think thats where my dual 44's has my EFI beat LOL

A big cam will really mess up idle with FI, at least with the GM injection, I had a hell of a time with mine, went with the turbo grind and it idled smooth, but some fancy resistor/ microswitch work for closed throttle to make a fixed map value worked good.

[panel]

Who can convert those inches(below) into KPA? Cause when I do it 30" becomes 101.59KPA and the 15" becomes 50.8KPA and that for some reason looks wrong to me?

[yvre]

14.5 psi = 1 bar = 100 kPa

[Blobber]

Now I have tried the VE Analyze Live, in TS.
I was not satisfied, it made the engine running very lean. I do not know why, because my afr table is not lean.

Any ideas why?

[panel]

14.5 psi = 1 bar = 100 kPa

Yes but.......

Who can convert those inches(above chart) into KPA? Cause when I do it 30" becomes 101.59KPA and the 15" becomes 50.8KPA and that for some reason looks wrong to me?

[panel]

Blobber your AFR in that log pic looks really spikey for very little TPS movement. To me it should look more like your MAP and RPM trace.