Fuel issue under boost

[Ty0234]

I have been trying to tune my truck a little before sending out to see if I understand things about the tuning. A little about my truck. 60lb injectors, 20g turbo, ATR upper, larger lower (TonyDQuick - I believe), no cat, stock DP.
Truck pulls good with little knock (under .2 -.4), but is extremely rich as soon as it gets into boost. Fuel ration drops from 14.7 to 8.9 to 9.9 as soon as it gets into boost, and comes up to 10 when at 17#. I have adjusted the knobs on the chip itself, and also running the chip at a 121 setting for 0-7# boost fuel adjustment. BLM is at a 127 when at idle when at 14.7. FP at 43#
I am running ADLDdroid to manage data.
TPS is a 50 with a blm of 127 at 16.5#

Any hints would be great as I am having issues with running to rich under boos

 

[EricM]

Are you sure you have a 3 bar MAP sensor and not a 2 bar?

If you want, attach a datalog and I'll take a look.

 

[Ty0234]

It is a 3 bar. I will try to load a video later today

 

[EricM]

The aldldroid log would be most helpful.

 

[Ty0234]

Here is the most recent log

 

[Ty0234]

If that doesnt work, let me know and I will upload a video

 

[EricM]

It looks like the injector duty cycle is about right for a setup like yours, so it really should not be that rich, unless something is making the engine less efficient, or the wideband is wrong (which exact wideband are you using?). Another possibility is fuel pressure is higher than expected.
In any case, you can keep leaning it out. In the log, I did not see param 2 at 121, it was still 128. I would reduce it to 115. Then reduce the WOT dial about 3 numbers. Then take another log.
What target AFR are you using in param 7?

 

[Ty0234]

I am using the aem for wide band. I will try to reduce that tomorrow to 115 parameter 2. And the. The wot by 3. Target air fuel is I believe 120 on the guage. I will check that when I get home in a few

 

[Ty0234]

With fuel pressure it is at 43 when at idle. But goes up to around 50 when I am on it at wot

 

[Ty0234]

Yes 120 on the guage for parameter 7

 

[Ty0234]

OK, I went for a run tonight. The fuel issue when I get into boost seems to be gone, but now I am getting a lot of knock at higher boost (where I was not getting it before). Here is the file. My thought was to bring the timing down and/or bring back up the WOT fuel to original. What are your thoughts?

 

[EricM]

I would set the target AFR to 10.8 for now. 12.0 is too lean. This would be for parameter 7.

Also, your boost is now higher. Spiking to 20psi now vs 18psi before. If you are running pump gas, that is too high.

 

[Ty0234]

Will do these tomorrow. I will adjust the wastegate rod to get the boost down. Did not adjust it from last time, but I did see it spike some during testing. Thank you for the advice with this.

 

[Ty0234]

OK,
So I adjusted the wastegate. Still had a spike to 20, I will have to adjust it more. Here are the files. I see knock came down some, but not all teh way as previous. I am guessing timing needs adjusted, or add fuel under high boost. Low boost seems good

 

[EricM]

Yes, too much knock. You'll have to either lower the boost, lower the timing, or increase octane.
I think the fueling is likely ok.

 

[Ty0234]

OK, I went out, lowered boost (spikes at 17#, goes to 15#), but still as soon as I got above 7 to 8, the knock retard numbers would rise drastically. I noticed that with the latest run, knock went to 5 but then as I was on the gas it went down as the boost stablized after an initial spike. When I was looking at old runs that are logged, I was boosting around 18 or so with under 2 degrees of knock on the log. I am wondering if this is fuel related. Yes, I lowered the idle numbers down, and that helped solve the knock when I got into boost until 7#, but now I am having an issue above the 7# where I wasnt before. looking at I am wondering if I am in a fuel situation where I have to find the magic spot where I have to turn up the pressure on teh regulator slowly (as it was VERY rich before) to find the spot where it works.
Just looking for advice, and I appreciate the support, and any hints or direction would be great. Running 93 octane. With lower the timing, are you talking about on the gauge (I believe peramiter 3 and 4).

 

[Ty0234]

Curious, it says my spark advance is around a 14.7 (comanded), but 10.2 (actual). Is this incorrect, or do I need to set the timing differently?

 

[EricM]

It's also possible this could be false knock (noise).
To reduce timing, I was talking about parameters 3 and 4. You would lower it say 3 degrees and see what happens.
Commanded spark is what is initially programmed. Actual is after the knock retard is applied.

 

[Ty0234]

I am wondering that. I will lower it a lot tomorrow and see how it responds. I tend to think it is a bad knock sensor. Thank you for the amaxzing customer service!

 

[Ty0234]

OK, so I figured a few things out. The boost spike has been resolved. It was caused by the wastegate binding when opening. Re-angled it, and now it is smooth. I attached a run tonight, and it is knocking at 16.7 lbs of boost (I have it set there right now). I also found out something interesting when tuning. When I first put the wastegate back in (forge), it was only making 12 lbs of boost as I did not adjust it, however I was getting no knock at 12 lb. My setting #1 is currently at 128. I am figuring tomorrow to adjust it by 10 in both ways and see how it reacts to give me a hint on which way to go. Please let me know your thoughts