Keuzy

'93 1.6 standard injector drivers, 700cc
Im trying to tune throttle response at idle, I figure getting the right injector timing down there will help a bit. Ive done some reading on here and general consensus is to start at 360 and dance around there, so I went to an empty parking lot and did that.



I have it set to mid pulse and each step is a 20 degree change.
If I were tuning for throttle response, would I want to target lowest MAP or lowest AFR? Seems to be about a 20 degree difference.

Keuzy

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SpartanSV

IMO There's no way that VE table is tuned properly.​​​​​ If that's not tuned properly you shouldn't draw any conclusions from injector timing changes.

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Keuzy

youre right, i shouldnt have shown that, i dont want to spread misinformation

shuiend

iTrader: (24)

Go check out https://evansperformanceacademy.vhx.tv/ and sign up for a month. He has some good videos about injector timing, and how to properly tune it. But as mentioned above I believe you want a pretty dialed in fuel map before you start playing with it.

Keuzy

What do you think is wrong with it? I know overun isnt dialed in very much, im aware, im working on it. You think the injector dead timing is off?

SpartanSV

You have some very steep jumps between cells next to each other in the same row targeting the same AFR. That's always a red flag.

The values in your idle area are spread out further than I'd expect. That could indicate a deadtime issue.

I am just making guesses without a proper log/tune but it looks like you have other things to sort out before worrying about injector timing.

Keuzy

Ill do some experimenting, im starting to think the injectors I got off classifieds arent legit.