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Me too

I guess it would be my luck that I end up being an edge case, but those fuses have definitely done the trick--I haven't had a glitch yet when flashing with them pulled, and I've probably done it 7-8...

So since HP Tuners claims their software works with my 2005 LLY Duramax, I would expect them to be able to tell me how to actually use it to write calibrations to my truck. Unfortunately not.
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Hello,

I'm at my wits' end with this issue. About 95% of the time when I try to write calibration on my 2005 LLY Duramax, it will fail after the Erasing VCM step then say that it can't find VIN...

So all else stock on say a LLY, how much horsepower will going to this 50/50 tune add? I just want to make sure I'm not going to hurt my transmission!

That's a shame, I just got a LLY Duramax and already have HP Tuners. My wife and I both switch off driving the truck and I was bummed to see this, as I'd like to be able to easily switch between...

Hey all,

Finishing up swapping a LS2 into a C3 Corvette and will be wiring up a wideband. I've data logged via the EGR position sensor before in other cars I've done but couldn't find anything...

Well apparantly the bias doesn't have an effect on WOT when running the MAF sensor. I set my bias to .5 at 150 grams (originally it was .0898, then Bluecat's recommendation) and it still had no...

I wonder if this could have anything to do with it--the OS/BIN/whatever that is on my PCM is from a 2002 V8 Chevy Silverado, whereas the motor I have is out of a 2003 C5 Z06. The PCM was initially...

So is there not really much that can be done about MAF correction vs IAT if the bias isn't really affecting it, other than having a winter and summer tune?

hmm, I'll try to do some logs for the different bias #s at high airflow when I get a chance. 12.1 cold temp AFR vs 12.8 warm is unacceptable to me though--I hope I can get something to work!

It...

Mine goes behind my radiator for about half the distance--I know that sucks, but it's the ONLY way to route it unfortunately.

Looking at your #'s again just now Bluecat helped me understand why this makes sense--I see now that a lower IAT gets adjusted towards ECT more than a higher IAT. I was thinking it was more linear...

Excellent--thanks!



Excellent, I'll give it a shot! I'm running MAF by the way, but in the lower airflow range your starting values put me almost spot on so hopefully tinkering with the higher...

Thanks for the responses everyone and not slamming a noob for this stuff lol.

Looking at the data by Bluecat he lists 150 > for WOT, so does that mean the bias for 150g/sec airflow will apply to...

I'm running the MAF on mine and have experienced large swings in my tune due to air temps. I tuned my car when it was in the 90's outside, but with the temperature around here being in the 30's -...

I completely agree that of course getting the estimated MAT as close as possible is going to make things work better all around.

My main question/hypothesis is that even if you manage to get the...

That's exactly what I stated!!!??? I realize this 100%

I think you're not understanding what I'm saying--when I'm talking about over/undercompensating, I'm talking about the computer not adding or...

as stated by bluecat:


What I bolded is the table I was talking about that seems to be the one that would affect over/undercompensation of drastic temperature changes.

Given that information I...

I understand exactly what you're saying redhardsupra.

Basically ALL that this bias table seems to be doing to me though is just estimating the MAT at different airflow rates to give the ACTUAL air...

My point was that the table described doesn't seem to compensate for changes in the IAT itself. All it does is make an adjustment to the IAT based upon ECT irregardless of how cold/hot the IAT is. ...

I've been thinking about this, but it doesn't totally make sense to me.

This table is basically a set adjustment for the IAT measured based upon ECT.

It seems to me that this adjustment...

Am I correct in assuming this bias table is still used when running MAF as well?

The reason I put the MAF where I did is because the integrated IAT sensor on it was getting BAD heat soak anywhere else I could mount it (basically within the engine bay).

I should be able to...

Well SONOFA!@#! I figured out the problem. My hypothesis was correct--the placement of the filter receiving direct airflow on the bottom and not top and having it directly attached to the MAF was...