ECMlink my first DSMlink log- please assist!

[thewraith]

I am hesitant to really adjust anything. I tried to adjust the 150mhz slider up 6% but got no changes in my cruise ltft's. Can you guys please check my log? Between 21 and 173 seconds I had it at a steady 3k rpm's at 60mph or so. My ltft mid never changes from 5.3 (is this normal?) and my low is pretty much around 12.3.

Then from 186 timeline till the end I am idling.

Any suggestions as to what to log and what settings to use would be much appreciated. I have set it for 880cc injectors already but I need to get those ltft's closer to 0 before anything else.

Please advise!

Thanks in advance

 

[2gGSX]

Your coolant temps are 235. You should probably fix that, or you'll warp the head and blow the HG.

I would suggest resetting the airflow sliders and add more fuel with your global adjustment slider.

 

[thewraith]

Thanks bro, the coolant problem occurred because my overflow tank is faulty. I will take care of it today. How much fuel should I add to start off with?

 

[2gGSX]

Going by your LTFT Mid, I would go from -45 to -39% and see if that clears it up. Are you sure those are 880's? Your fuel trims are saying that they are closer to 750's. The other possibility is that your base fuel pressure is not at 43 psi w/o the vac line, even though it's the stock FPR. For the difference to be that huge on a 2g though, you'd have to have a base fuel pressure of around ~33.5 psi. Just some food for thought.

 

[thewraith]

Hmm, I'm sure they are 880pte's since I checked the serial numbers when I got them. They had supposedly been flow tested. i dont' notice any fuel delivery problems such as what i've seen with other bad injectors. I have seen a chart elsewhere (it's bookmarked on home computer) that said the -45 is incorrect for a 2g w/880's. I don't remember the exact link But the guy suggested something in the 30's as well.

 

[thewraith]

All in all a good result with a few questions and another attached file.

Great suggestion! Attached is my new log, from 0-77 seconds (at idle) my ltft low is -2.5 and ltft mid is +2.5.

Then from 89-141 seconds I am cruising and the ltft's stay the same.

Now here is the weird part (i think). After I got off the highway, from 152-251 the ltft's stay and low even goes down to 0. But right after that at 345 seconds it goes up and stays up. What gives?

NOTE THAT I HAD TO ZIP THE FILE BECAUSE OF IT'S SIZE AND PUT A .DOC EXTENSION ON THE END BECAUSE THE FORUM WOULD NOT ALLOW ME TO UPLOAD A .ZIP FILE. JUST OPEN THE FILE WITH WINZIP, YOU MAY HAVE TO REMOVE THE .DOC EXTENSION FROM THE .ZIP.DOC ENDING OF THE FILE

Thanks again!

meek

 

[2gGSX]

I have to get some work done so I'm going to have to be brief.

1. Your coolant temps are still all over the place. I'm not sure if this is due to running at such a high temperature earlier or if it's just random fluctuation, but you should really look into getting that down to a consistent ~200-206 degrees.
2. Your under-hood intake temps are near 90-100 degrees, and you should try to lower that as well either via ducting, a cold air intake, or just keep the radiator fans running all the time (works for me anyways). See around t=455 in the second log.
3. Your front O2 sensor may be dying--it oscillates for the most part, but it likes to randomly flatline or jump or hold at various points in the log. At idle it cycles, but very VERY slowly. Wideband output verifies that air/fuel at idle is fluctuating synchronous to Front O2 behavior. While it will have a little variation, you're oscillating between 15.6 and 14.6 which is a much wider gap than I'm used to seeing.
4. You need to adjust your throttle position in DSMLink. Go to ECU-->TPS and reference the DSMLink wiki or user's manual for instructions on how to do it. At idle you are seeing .67v for TPSvolts, and it should only be .63v.
5. ISCPosition should be ~30 at idle. I forget the exact way, but I think you screw the BISS in more to raise ISCPosition. Try that first and see which way ISCPosition goes, and if I'm wrong then "unscrew" it. Either way, try to get ISCPosition to equal 30 with the car running. The ECU takes a while to update this value though, so give it a little time (5 mins or so).
6. In a similar vein, log LrndIdleAdj next time as well and keep track of that. It should hover around 140 when ISCPosition is around 30. This will also take a little time (5 mins or so)
7. Log the value "OpenLoop" as well just to verify everything's working correctly.

Sorry for the wall of text. That's all I can think of for now. There are some things that seem sort of "off", so it's best to fix those first before focusing on fuel trims or anything else. You should never try to tune around issues.

 

[thewraith]

Sorry? Dude- you just gave me a hell of alot of great advice! Thanks bro! I will make these adjustments and definitely get back to you. I will run both fans on from now on. I'm guessing because I'm running pure water in the cold and I temporarily fixed the overflow tank problem till the new aluminum one comes in.

I will learn as I keep going with this and hopefully be able to advise others like you are me.

thanks again!

meek

 

[blcknspo0ln]

Definitely not a bible, but a couple of link members wrote this up and I think it's a great beginner guide.