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  1. Replies
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    I've found some data on LS1tech that people seem...

    I've found some data on LS1tech that people seem to have had success with. I'll see how it turns out.
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    I have found data from several different sources...

    I have found data from several different sources but it's all different so I'm not sure which to use.
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    I used stock data. I know it's not exactly right...

    I used stock data. I know it's not exactly right but I'm unable to find the correct data from a reputable source. I've seen where people have used the stock data with good result but idk.
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    Wideband is installed about a foot past the...

    Wideband is installed about a foot past the manifold on the driver's side. Cats are still installed. The areas that are high are when I let off the throttle and map bottoms out I believe but not...
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    Anybody know what to do for the hot start issue?

    Anybody know what to do for the hot start issue?
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    Here is the current tune. Thank you.

    Here is the current tune. Thank you.
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    The iat is located behind the throttle body in...

    The iat is located behind the throttle body in the intake. I did this to prepare for the time when i eventually go FI. Where would you suggest I move it to? I did add fuel to the IAT multiplier...
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    Maf is unpugged and all dtc's are set...

    Maf is unpugged and all dtc's are set accordingly. Do I need to zero out the maf table? The iats are high because of heatsoak. Once I drive they go down to around 75-85. Once it "catches" after a...
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    Thank you. I have been super busy with work and...

    Thank you. I have been super busy with work and finally think i have it figured our. I do believe it is the iat causing the swings. I did find an injector connector that was loose and was causing...
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    I appreciate everyone that has helped out. I...

    I appreciate everyone that has helped out. I have done everything everyone has suggested. Checked fuel pressure and looked at the tune. Iat adder under the fuel tab table is zeroed out so I was...
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    Fuel pressure is around 46-50 at idle. It is...

    Fuel pressure is around 46-50 at idle. It is around 50-52 just cruising around. It goes up to 56-57 at higher kpa. If I unplug the regulator vacuum line, pressure goes to 60. Iat adder is disabled...
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    Help with AFR in tune

    Would someone mind taking a look at these two logs? I'm having a problem with erratic AFR's. All was going well with tuning and this has started the past couple days. Afr's on the same day and...
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    Ok. Was just making sure there wasn't a table...

    Ok. Was just making sure there wasn't a table that I had missed. Thank you.
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    Park and Drive AFR

    Can someone explain what tables affect the afr between park and drive at idle. My afr changes at least a full point when shifting between the two. 2 bar OS 03 2500 HD 4l80e OLSD. Thanks in advance.
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    I found my problem. It was a stupid mistake. When...

    I found my problem. It was a stupid mistake. When I upgraded to 2 bar OS, I did not change the row labels in the scanner. So, when I copied and pasted, it pasted the data in the wrong cells. Thanks...
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    I've been gathering data using the afr error...

    I've been gathering data using the afr error histogram and using the copy paste special multiply by half. The hole is really weird. Think I should start with a stock VE table and add 20% and start...
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    Do you have any other suggestions? How do you...

    Do you have any other suggestions? How do you think the ve table looks so far? I put it back into closed loop and it seemed to idle perfect at 14.7 ish. I didn't drive it yet though.
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    The WB is just past the stock o2 sensor on the...

    The WB is just past the stock o2 sensor on the driver's side. Injectors were sent off and flow tested.
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    I changed to a 2 bar OS. I also halved fuel...

    I changed to a 2 bar OS. I also halved fuel milligrams. Still cant seem to get anywhere. Also, i noticed that when i command a certain AFR in the special functions in the scanner, the WB does not...
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    Great! Thanks man!

    Great! Thanks man!
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    Thanks! Does it have to be the completely stock...

    Thanks! Does it have to be the completely stock file I write entire back? Or, just a file that was on the one bar OS?
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    I have already upgraded the OS. Is there a way I...

    I have already upgraded the OS. Is there a way I can downgrade without using additional credits? I'll try those suggestions. Thanks!
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    What am I missing?

    Just upgraded to 3 bar OS with 1 bar map sensor. I also upgraded to decapped injectors that have been flow tested at 75 pounds per hour. I am trying to tune the VE table but am not getting...
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    Thank You!

    Thank You!
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    That is working much better. When I get to...

    That is working much better. When I get to dialing in the MAF, would I still disable the LTFT? It's not mentioned anywhere in the guide.
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