hi new to tuning i have a stand alone harness it runns fine to about 4500 then it just quits pulling ive tried everything i can think of any help would be apperciated
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hi new to tuning i have a stand alone harness it runns fine to about 4500 then it just quits pulling ive tried everything i can think of any help would be apperciated
According to the title of your tune, you are boosted. Your tune is set up for a 1bar MAP sensor and has no boost enrichment. You should be running COS3 and a 2 bar MAP sensor and giving it some more fuel and backing off of the timing a bit above 105 KPA.
You need to get this sorted out before you pop the engine. You are probably very very lean.
Jeff
how can i set it up for the boost enrichment
Open up your tune in EFILive then go to the top and open the Help tab. Then go to Turorials on open the Custom OS upgrade tutorial LS1. Read and follow that PDF. You will also need a 2 Bar MAP sensor and set table C6301 to 190. Make sure you have enough injector to fuel that setup.
Jeff
i maybe in over my head that looks complicated
Print the COS Tutorial ... read it several times ... and make some notes about the necessary steps. It is actually very straight forward.Quote:
Originally Posted by danny68ss
Do you have a 2 bar (or 3 bar) MAP sensor fitted ? The stock 5.3L 1 bar MAP is useless under boost conditions.
If you are using EFILive for this project, you may want to consider posting on their Forum to get support with respect to the COS upgrade.
yea it still has the 1 bar going to order the 2 bar today and try to get this figured out i have the same set up on my silverado ss it works fine on it guess just got lucky with it but this one flattens out around 4500
You really need the Custom Operating System and 2-3 bar MAP to tune it properly... as stated already.
You may just be lucky it worked on the other setup? Maybe it's melting slowly? It's not tuned correctly though.
This new one may be just running out of fuel? For what ever reason it does not matter, you should stop!
ordering 52 pound injectors and a map sensor now just ran off the instructions for the custom os might need alittle help setting it up but im going to give it a shot
Make sure you get injector data that can be understood and entered into the calibration.
Jeff
it says they come with a flow sheet my truck has 52s in it i hope i can copy its tune to get me started if its not locked
The tune you posted here is a 2004 truck calibration in a 1mb PCM. Does your truck have a 2004 COS?
Jeff
no i dont think so i know it has a stock map sensor
how do i get into the custom os
Here is your tune converted to "04073003". Which is a 2004 COS3. It is set up as a 5.3, M/T, DBW---STARTER TUNE. I set the MAP scaler to 190 for a 2bar MAP sensor. If you use a different MAP Sensor you will need to scale table C6301 accordingly. I scaled up table A0009 by 35%----Just as a starting point. You will need to input your injector data into the tune when you get your new injectors. You will need to "Full Flash" this calibration into your PCM when you are ready. You will need a good Wide Band O2 Sensor to input into your tuning logs. You should be spending a LOT of time on the EFILive forum in the Gen3 and Forced Induction Sections as well as studying the tutorials.Quote:
Originally Posted by danny68ss
Jeff
i really appreciate the help ive been up all night trying to figure out how to change to the custom os
The 2004 factory calibration will work just fine. I have done several and NEVER been able to out run the MAF table. GM's GMPX built several trucks and they did not use a COS.
Are EFILive's COS speed density calibrations?
EFILive COS may be operated jut like an OEM OS - MAF only, SD only, or blended (OEM style). While you could run the OEM OS in MAF only mode (as long as you don't exceed the airflow limits), a well tuned SD configuration (or blended configuration) will yield a "sharper" tune, with better throttle response.Quote:
Originally Posted by Caleditor
The HPT 2 bars are SD calibrations. SD calibration lack a lot. It would take me hours to explain everything that the MAF is a function ofQuote:
Originally Posted by Buzz
Good to here the EFILive COS use MAF's. The 2004 MAF limit is 12,000 hz. The most I got out of a Maggie was 11,250 and the Whipple almost 11,700. The Whipple truck was spun past the RPM range
I just ran a C6 with a Lingenfelter E force supercharger yesterday. I pulled the data-log up and found that it maxed out at as low as 4800 in 1st and the rest of the gears about 6000, I ran it to 6800 with it maxed out. I never thought that would have happened on this car.
Trying to answer the OP's questions about a COS ... not interested in a Coke vs Pepsi debate regarding SD vs MAF tunes. You will find very knowledge people will that will line up on either side of that fence. I work with mainly E38 / E67 these days ... a lot of folks seem to want an A6 in their dream car.Quote:
Originally Posted by Caleditor
MAF tunes are prevalent for several reasons - they are quick and easy (meaning they cost less), they require less knowledge / experience on the part of the person doing the tune, and only EFILive has these (E38 / E67) VE or VVE tables native within the tuning software.
Having driven and tuned a lot of these, the SD tunes (or SD and MAF combined) always seem a little crisper during rapid throttle transitions, than do the MAF only tunes - but perhaps this is merely my person bias.
i installed the new custom os and tune what do i need to do to get it started now
I understand what you are stating. I do all the VE tables and the MAF table when I tune.Quote:
Originally Posted by Buzz
If you read the original post you will see that a COS will not fix his issue. He is not out flowing the MAF at 4500 rpm's with a 5.3L
The MAP and Injector data in that tune are wrong for your setup. I set it for a 2bar MAP---You still have a 1bar. The injector data in that tune is not stock. Your injectors are stock. You need a 2 bar MAP and either input your stock injector information in it or wait and install your new injectors and input the data from them. The COS3 I posted was not intended to run your engine in its present state.Quote:
Originally Posted by danny68ss
Jeff
ok i should get my map and injectors next week do you know what injectors it was set for
Good lord man, do you speak just to hear the sound of your own voice ?Quote:
Originally Posted by Caleditor
Of course I read his original post - that is why I chose to participate in this thread. Without a COS and a 2 bar MAP sensor, the only tuning option available is MAF only - eliminating SD and blended MAF & SD (OEM style) as options. Better to have three tuning options rather than just one.