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Thread: acceleration enrichment on off at idle

  1. #1
    Fuel Injected! Aholt91ss's Avatar
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    acceleration enrichment on off at idle

    need help first time tune i just got all the mechanical issues taken care of for most part i can post datalog has issue when you stab throttle cuts out my datalog232013.xdl
    Last edited by Aholt91ss; 02-03-2013 at 10:27 PM.

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    Super Moderator dave w's Avatar
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    I'm going to need more information, .xdf, .adx .bin along with the .xdl.

    dave w

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    Fuel Injected! Aholt91ss's Avatar
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    i have a tbi 350 with vortec heads weiand carb intake manual trans using 16197427 pcm i turned a fuel pressure a little bit i have been using your spreadsheet to tune VE but i am new to tuning obviously whenever i punch the throttle it cuts out
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    Last edited by Aholt91ss; 02-04-2013 at 10:26 AM.

  4. #4
    Super Moderator dave w's Avatar
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    Quote Originally Posted by Aholt91ss View Post
    i have a tbi 350 with vortec heads weiand carb intake manual trans using 16197427 pcm i turned a fuel pressure a little bit i have been using your spreadsheet to tune VE but i am new to tuning obviously whenever i punch the throttle it cuts out
    Ok, the attached files help. I should have time later today to take a look at the files. As a guideline, I would increase the AE Parameters, AE vs MAP difference and AE vs TPS difference about 30% or so to see what happens.

    dave w

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    Fuel Injected! Aholt91ss's Avatar
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    just did im about to go to work ill make another log i appreciate the help
    Last edited by Aholt91ss; 02-04-2013 at 05:48 PM.

  6. #6
    Fuel Injected! Aholt91ss's Avatar
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    here are data logs from this morning
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    RIP EagleMark's Avatar
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    Does that have a MAT sensor? It's no good, reading -40 and error 23 is set.

    Also error 24 and 33. Clear codes, try again.

    In log 242013-2.xdl‎ it's no good, the engine was never warmed uip. Always do logs with warmed up engine.

    EDIT: none of the logs go over 155 F...

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    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  8. #8
    Fuel Injected! Aholt91ss's Avatar
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    i have a 160 temp thermostat should i get a 180 or 195 and no mat sensor i have the flag set off i dont know why its on ill post more logs tomorrow

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    Super Moderator dave w's Avatar
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    Looks a touch rich at the lower RPM's. The excel spread sheet will help correct the rich condition in the low RPM's. To get the best possible data log to tune with, DO NOT include power enrichment, acceleration enrichment, or open loop data in the data log. Drive easy and at steady speeds. It's good to stay one gear lower than normal to get data at higher RPM's. It's very important to gets many counts in each cell. If a cell has less than 20 or so hits, I don't like to use the data from that cell. It helps to interpolate cells with missing data.

    dave w

  10. #10
    Fuel Injected! Aholt91ss's Avatar
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    how do tell how long its been in a cell? just by watching the blm histograms?

  11. #11
    Super Moderator dave w's Avatar
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    Quote Originally Posted by Aholt91ss View Post
    how do tell how long its been in a cell? just by watching the blm histograms?
    The drop down menu.

    dave w
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  12. #12
    Fuel Injected! Aholt91ss's Avatar
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    oh that is handy to know ive been keeping it on running average like you explained on how to use the spreadsheet

  13. #13
    Fuel Injected! Aholt91ss's Avatar
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    but he mark was talking about not being up to temp cause of 160* thermostat should swap it out for 180

  14. #14
    RIP EagleMark's Avatar
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    What came in the motor? Is there any high preformance build here that needs a lower thermastat? If not put stock back in, less work on the chip and it will run better and get better milage.

    Code 23 is strange? I didn't think the vehicle came with one, only $0D that has them is CPI V6... and you say it's off in bin? Hmmmm?

    EDIT: Your code 23 is checked, uncheck it. Disconnect power to PCM to clear codes and see if others come back.

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  15. #15
    Fuel Injected! Aholt91ss's Avatar
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    yeah ill stop by the partshouse in morning and pick a thermostat up i switched from 4288 ecm to the 7427 pcm and started with a cpi 4.3 manual bin

    unchecked code 23
    Last edited by Aholt91ss; 02-05-2013 at 09:17 AM.

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