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slight surging on warm up

  • Thread starter Thread starter Foxbodyguy49
  • Start date Start date Oct 10, 2019

Foxbodyguy49

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Jul 30, 2019
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Oct 10, 2019
#1
  • Oct 10, 2019
  • #1
hey guys im getting a small amount of surging during the first start of the day no matter what temperature it is outside. alll other starts are fine, ive changed the warmup enrichment but no change. id like it to start and have a high idle that gradually settles down to target like OEM cars. heres my tune and a datalog, its hard to see what my AFRs are upon startup casue the gauge doesn't turn on till a few minutes but I don't think its fueling problem im leaning more towards either Iac duty cycle or maybe een timing related or just close loop coming in too soon. lmk what you think.
 

Attachments

  • CurrentTune.msq
    CurrentTune.msq
    119 KB · Views: 243
  • 2019-10-10_12.15.26.msl
    2019-10-10_12.15.26.msl
    6 MB · Views: 230

a91what

SendMeUrDataLog
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Oct 10, 2019
#2
  • Oct 10, 2019
  • #2
your idle surge issue seems to be IGN advance related during warmup.

Here is what you should try first.

Go into idle settings- idle adaptive advance idle- the clt condition is set to 140* so it does not come into play until 140*...
Try lowering this to 0* and see if it clears up the issue you are having.
 

Foxbodyguy49

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Jul 30, 2019
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Oct 10, 2019
#3
  • Oct 10, 2019
  • #3
Thanks Steve I’ll give that a try tomorrow and report back!
 

Foxbodyguy49

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Oct 13, 2019
#4
  • Oct 13, 2019
  • #4
so I changed closed loop idle activation temperature to 0 and changed the below RPM activation window from 1200 to 1500RPM and it worked perfectly. starts up and settles down to a smooth idle. thanks again for pointing me in the right direction steve this little change made the car that much more enjoyable to get in and turn the key. heres a new datalog and my current tune.
 

Attachments

  • 2019-10-12_10.14.51.msl
    2019-10-12_10.14.51.msl
    5.6 MB · Views: 215
  • CurrentTune.msq
    CurrentTune.msq
    119 KB · Views: 244

a91what

SendMeUrDataLog
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Oct 13, 2019
#5
  • Oct 13, 2019
  • #5
There is some work left to be done with the fuel trims, its not bad but the transitional areas need some attention. You should try using MLV to trim the fuel from the datalog above. I could do it for you if you like.
 

Foxbodyguy49

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Oct 14, 2019
#6
  • Oct 14, 2019
  • #6
Sure I’d like to see how you do it cause I mean I’ve been trying using the MLV Ve analyze as well as I have the histogram table setup the way you told me to but still trying to figure out what changes need to be made where and how much weight to give these cells I’ve never gotten use to hand trimming the table yet lol
 

a91what

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#7
  • Oct 14, 2019
  • #7
Ok if I don't respond in a day or so tag me again for a reminder.. I get busy and forget.
 
Reactions: Foxbodyguy49

Foxbodyguy49

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Oct 17, 2019
#8
  • Oct 17, 2019
  • #8
@a91what
 

a91what

SendMeUrDataLog
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Oct 17, 2019
#9
  • Oct 17, 2019
  • #9
sorry lol told ya i need a reminder.

I did trim it by hand but we will want to get at least one more log file to verify proper fueling.
 

Attachments

  • Foxbodyguy REV.1.0.8.msq
    Foxbodyguy REV.1.0.8.msq
    118.9 KB · Views: 255

Foxbodyguy49

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Jul 30, 2019
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Oct 17, 2019
#10
  • Oct 17, 2019
  • #10
a91what said:
sorry lol told ya i need a reminder.

I did trim it by hand but we will want to get at least one more log file to verify proper fueling.
Click to expand...
a91what said:
sorry lol told ya i need a reminder.

I did trim it by hand but we will want to get at least one more log file to verify proper fueling.
Click to expand...
Thankyou steve I will run this today and report back much appreciated as always
 

Foxbodyguy49

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Jul 30, 2019
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Oct 17, 2019
#11
  • Oct 17, 2019
  • #11
heres a new Log from a few ago
 

Attachments

  • 2019-10-16_06.44.09.msl
    2019-10-16_06.44.09.msl
    7.5 MB · Views: 213
  • CurrentTune.msq
    CurrentTune.msq
    118.9 KB · Views: 255

a91what

SendMeUrDataLog
10 Year Member
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Oct 17, 2019
#12
  • Oct 17, 2019
  • #12
..
 

Attachments

  • Foxbodyguy REV.1.0.9.msq
    Foxbodyguy REV.1.0.9.msq
    116.3 KB · Views: 275

Foxbodyguy49

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Jul 30, 2019
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Oct 18, 2019
#13
  • Oct 18, 2019
  • #13
thanks ill give this a try today
 

Foxbodyguy49

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Oct 25, 2019
#14
  • Oct 25, 2019
  • #14
This is a datalog from today up top is looking a lot better but my cruise area looks a little lean let me know what you think.
 

Attachments

  • CurrentTune.msq
    CurrentTune.msq
    118.9 KB · Views: 270
  • 2019-10-25_00.05.39.msl
    2019-10-25_00.05.39.msl
    3.6 MB · Views: 177

a91what

SendMeUrDataLog
10 Year Member
Apr 6, 2011
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Oct 25, 2019
#15
  • Oct 25, 2019
  • #15
you are lean in some of the areas, just take your time cleaning it up its not that far off.
 

Foxbodyguy49

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Jul 30, 2019
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Oct 25, 2019
#16
  • Oct 25, 2019
  • #16
sweet thanks steve!
 

Foxbodyguy49

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Oct 31, 2019
#17
  • Oct 31, 2019
  • #17
So ive been trimming the Ve table a little at a time and I think im pretty close if you don't mind taking a look and just letting me know if im heading in the right direction. ive been using a few of the histograms ive set up to check but it seems like im at the point where some logs are telling me to go up 1 in certain cells then later back down so im kinda in between and might just leave it more on the rich side of things.
 

Attachments

  • 2019-10-30_17.31.47.msl
    2019-10-30_17.31.47.msl
    5.1 MB · Views: 181
  • CurrentTune.msq
    CurrentTune.msq
    118.9 KB · Views: 258

Foxbodyguy49

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Jul 30, 2019
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Longisland
Nov 5, 2019
#18
  • Nov 5, 2019
  • #18
@a91what
 

a91what

SendMeUrDataLog
10 Year Member
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Nov 5, 2019
#19
  • Nov 5, 2019
  • #19
looks pretty good, maybe some very small amounts to do at the very edges of the fuel map but thats it. I would let it ride
 

Foxbodyguy49

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Jul 30, 2019
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Longisland
Nov 5, 2019
#20
  • Nov 5, 2019
  • #20
My man ! Thanks for the help
 
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