xmaciek82x

iTrader: (14)

Like I stated above, that is what I did to the IPW table originally (l2r99gst helped me with tha weeks ago). The formula I used was
(513 old/696 new) = .737. I took that and modified the IPW table accordingly. After those changes the car seemed to start even worse.

iTune

iTrader: (3)

If the injectors are scaled correctly and you have latencies dialed in, i would say you'll need to adjust the Cranking Enrichment Injector Pulse Width(IPW) adder in the coolant temp range you're having problems with.

Appauldd

iTrader: (22)

We seriously need an EcuFlash for dummies book. It seems the more I learn, the more wrong I become. UGH.

l2r99gst

iTrader: (2)

It sounds like you are doing everything right. Just do the quick tests I mentioned and go from there.

If lowering that table truly does make it worse, then your base latency may be a bit too low and/or your base injector scaling may be a bit too high. Tuning injectors perfectly is definitely one of the harder things to do. It will take some time to get them perfect.

But, that table that you are using is the table to use for cranking IPW adjustments. There are a couple of others for the first few seconds or so after cranking as well. The advanced fuel thread explains it very well.

I have a couple of quick questions for you...

1. With the injector scaling that you settled on, does your WOT AFR match your WOT AFR when on stock injectors or did you have to adjust your fuel map to bring them back in line?
2. How do your STFT and LTFTs look during idle and cruise?

xmaciek82x

iTrader: (14)

1. I used the injector scaling values posted in the "Injector Scaling and Latency (SUPERMERGE)" thread posted by cpoevo. for pte 780 scalled down to 696.
I never really tuned my car with stock injectors, someone else did. I did bunch of work on it over the winter and just started retuning it. So I do not have logs from my old setup.

2. I will verify my STFT and LTFT when I get home, but from what I remember both were within +/- 5%.

l2r99gst

iTrader: (2)

The reason why I asked #1 is because it's important to know so that you are sure that your scaling is in line. If the scaling is off, you can still tune around it, but you will have to account for it in the various other tables.

Appauldd

iTrader: (22)

^
Since there is a lot more fuel tables to mess with now.....could you write a "how to" on them?

I ask because we have so many tables now and tuning has become very complicated. To simplify it would certainly make searching for hours for information less of a hassle. Guess this is what I get for not leaving well enough alone.

xmaciek82x

iTrader: (14)

I will look through some older logs. But doubt I have AFR logging on them

xmaciek82x

iTrader: (14)

So it looks like it happens at cold and warm starts. l2r99gst, I did what you said and held the throttle half way in and the car started up after two cranks. Too lean I guess? I tried it when the coolant temp was as 30 and then again when it was in 60s. My current original values on the Crank IPW are:

-32 = 226.296
-18 = 108.128
-8 = 46.096
7 = 17.296
20 = 15.4
34 = 12.4
50 = 6.72
77 = 3
82 = 3

Should I INCREASE them between 20 and 77? By how much?

Thanks

l2r99gst

iTrader: (2)

So, was the starting better or worse with the throttle slightly open? If better, then you are too rich at those coolant temps. If worse, you are too lean.

If you are too rich, then you lower the numbers in that table to lean it out at the correct temperatures. If too lean, then you raise the numbers in that table to richen it up. It's important to make sure you are adjusting the correct cell, as different temps will require pretty different values. Usually warm starts want very little fuel, especially on E85, but cold starts on E85 want a ton of fuel.

I'm prettu sure you said you were on pump gas (93), but still make sure that you are adjusting only the cell(s) where your issue is.

travman

iTrader: (26)

Those look like the stock values? (don't have a stock map in front of me to confirm)

Usually when you have to use the throttle and it fires it is a rich condition......which if those values are still stock it is probably to rich.

Try something like this:

-32 = 166.8
-18 = 79.7
-8 = 33.97
7 = 17.296
20 = 12.75
34 = 9.14
50 = 4.95
77 = 2.21
82 = 2.21

those are the current values multiplied by .7371 which is the old scaling / new scaling.......

xmaciek82x

iTrader: (14)

It was better, so I'm rich. But when I had the smaller values, it was even worse I guess I will mess around with this and get back to you guys.

Yup, I already had those new values. Original multiplied by .737, and the car started even worse

I guess I will go back to:
-32 = 166.8
-18 = 79.7
-8 = 33.97
7 = 17.296
20 = 12.75
34 = 9.14
50 = 4.95
77 = 2.21
82 = 2.21

And see if the car is still rick or too lean now.

xmaciek82x

iTrader: (14)

So I tried everything I know how to. I increased the crank IPW, I lowered the crank IPW and same results. At Warm and Cold starts the car just keeps cranking till it finally starts. Is there anythign I can log? I mean at crank the EvoScan disconnects, so any help would be great.

I also rescaled the injectors to 680 from the exisitng 696, but once the car sits for a while, probably 10+ minutes the same thing happens. If I turn it off for about 3-5 minutes it fires right up.

Appauldd

iTrader: (22)

Check your crank sensor......just a thought.

l2r99gst

iTrader: (2)

Log your coolant temp as soon as possible when you get the starting issue. Then adjust only that cell. Don't adjust all of them.

If your hot starts are fine, don't touch those cell(s). If you warm starts have the issue and start better with the throttle halfway open, then adjust the specific cell and make the values smaller. Don't be afraid to go much smaller or as small as your hot start cells. In my experience, warm start needs very little fuel.

I'm on E85 and 1250s, but let me show you mine for a quick example.

Here is my altmap settings (remember this is E85, which is why the cold start cells are very high, but it gives you an idea about the warm start cells):