Thread: LTFT moving in open loop (O2 unplugged)??

considering I have 100's and my idle puts my IPW's around 1.8... It doesnt work below 2.0... which believe it or not is excatly 1.3(min pulse)+.7(offset).

Yay.

How is your IPW 1.8, yet doesn't work below 2.0?

it "should" be 1.8 but never makes it there. You can watch it march down from 2.7 during warmup and stuff, then hit a wall when it trys to command under 2.0. It then starts jumping between 1.3 and 2.0 causing a crummy lumpy idle.

Thats pretty crappy. Are your injectors controllable at pulse widths that low?

Using your math I should not be able to go under ~1.6 ms yet I've seen as low as 1.56 in transients, however typically ~1.7 at idle. This is with 70 lb injectors.

So how did you lower the pulse widths that low.. Mine still runs rich in closed loop under decel in 4th gear.. If your high enough in the rpm it'll go full into dfco but for the most part the lowest it'll go is 2.136

injectors are stable at 1.1, but it wont command it because my pcm is a hoe.

Originally Posted by LapeerGTP

So how did you lower the pulse widths that low.. Mine still runs rich in closed loop under decel in 4th gear.. If your high enough in the rpm it'll go full into dfco but for the most part the lowest it'll go is 2.136

Use large injectors.

Define rich.

10.5--10.9.

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Originally Posted by darkhorizon

injectors are stable at 1.1, but it wont command it because my pcm is a hoe.

You use DHP? Its adjustable via TT is it not?

Originally Posted by LapeerGTP

10.5--10.9.

thats pretty messed up.

I'll throw a scan up when I get home tuesday... It runs perfect everywhere except 35map and below.

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Here is a Scan.. It's a short one showing going down the expressway and tipping out of the gas then back in..
Any help would be greatly appreciated.
Rich

Any ideas how to fix the rich decel condition??

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Deaccel enleanment.

Try stock settings.

Then try more enleanment.

Also, can you post a log in at least a spread sheet?

That is a SpreadSheet.. It's a csv file in txt format.. just change the .txt to .csv or just open the file in excel
The forum won't let me attach a csv file.
Rich

Also the stock settings vs map are at 1... I would assume that the smaller the number the more enleanment judging by the other enleanment options.

Whats your IPW at idle?

avg around 2.76 ish.. In Tiny Tuner my Bin does not come up with min pulse width

I can't believe the min pulse width would be set at 2.15 though...

Neither do i.

Does this occur with the front o2 plugged in?

I believe that scan was with the front 02 plugged in and reading 900+