I have posted on this before last week, this is driving me absolutely insane! I know that I have spent a solid 6-8 hours attempting to tune & log data. I have come to the conclusion that I am either not very intelligent at all, or maybe I am just to brillant & I am overlooking something very simple.

I have a gut feeling I am just not that brillant.

I have been attempting the last few weeks to do a ve tune since the new cam install with the maf unplugged. It is f#@king impossible!

Every time I attempt to unplug my maf the truck dies, I have done everything from lowering my high freq. maf fail rates to 0., to lowering the expected flow rates, to looking at the actual default rates when unplugged & plugging those numbers in. I have an 03 which has the electronic throttle control & I either get a reduced engine power or idles @ 2000 rpm & won't go anywhere.......

I spent the better part of my weekend tuning by simply leaving the maf plugged in, which the flow rates are way off by my log data, & playing with the ve tables to adjust accordingly.

the problem is that I know that my tune is not correct because the changes I made are with the incorrect maf rates & i know the computer is using that info for fuel caculations. Tuning it in this manner has brought me a great deal of consistantsy with my long term fuel trims. As of right now I am about -2 to -5% ltft's with the exception of idling, I have leaned out this portion of the ve table to achieve a 0 to +2% ltft's.

I still have a problem with exceesive rich condition after moderate throttle request right after releasing the accelerator, my transition time to achieve normal ft's again is quite slow.

anyone with any solutions?????

I am using edit with a techII for logging data....

 

Ohhh...

If you set the MAF fail to 0, you don't need to pop the hood. (No need to touch/disconnect the MAF).

The IAT sensor is in the MAF on these trucks, so that's probably why the computer is freaking out on you...

I don't have much more time to write right now, but I just wanted to put this out here. I'll try to revisit this later today/tonight.

 

I tried setting to 0 fail rate, did not dissconnect, still went apeshit...

 

Shoot. You running the stock VE table now?

Here is mine after my SD tune. I'm not sure if you just want to compare, or actually give it a try?

35 39 44 47 50 51 53 58 64 68 68 64 57 49 43 40 39 39 39 39
39 44 48 52 55 57 60 64 70 74 74 71 67 60 55 52 51 51 51 51
42 48 54 59 61 61 63 69 74 78 80 78 74 69 64 62 61 61 61 61
43 53 59 65 64 64 66 72 78 82 85 83 80 75 71 69 69 69 69 69
44 55 63 67 65 66 69 75 81 85 88 87 84 80 77 75 75 75 75 75
46 57 65 70 67 68 71 77 83 88 90 90 87 83 80 79 79 79 79 79
51 59 67 72 69 70 75 80 87 90 92 92 89 86 83 82 82 82 82 82
53 62 69 73 72 73 77 83 88 92 94 93 90 87 85 84 84 84 84 84
53 63 70 75 75 77 80 85 89 92 94 93 91 88 86 85 85 85 85 85
54 66 73 76 77 79 83 86 90 93 95 94 92 89 87 86 86 86 86 86
57 69 76 78 79 81 84 88 91 94 95 94 92 90 88 87 87 87 87 87
60 71 77 79 80 82 85 88 92 95 96 95 93 91 89 88 88 87 87 87
64 73 78 80 80 83 86 89 92 95 96 95 93 91 90 89 89 89 89 89
68 74 79 82 82 84 87 91 94 96 97 96 94 92 90 90 90 89 89 89
71 76 81 83 83 86 89 93 95 97 98 97 95 93 91 91 90 90 90 90
73 77 82 84 85 88 90 93 96 98 99 98 96 94 92 92 92 91 91 91
75 79 83 85 87 89 90 93 96 98 100 99 97 95 93 93 93 93 93 93
77 80 84 86 88 89 91 94 97 99 100 99 97 95 93 93 93 93 93 93
77 80 84 86 88 90 91 94 97 99 100 99 97 95 93 93 93 93 93 93

 

983 1096 1267 1377 1468 1437 1231
1282 1394 1469 1603 1677 1650 1586
1357 1424 1554 1692 1759 1761 1693
1466 1558 1679 1797 1853 1838 1781
1573 1612 1704 1808 1856 1870 1830
1615 1634 1718 1809 1861 1883 1851
1621 1650 1723 1810 1870 1890 1857
1625 1663 1728 1811 1884 1908 1881
1660 1672 1741 1833 1892 1936 1915
1679 1698 1778 1851 1906 1946 1929
1681 1721 1780 1861 1913 1956 1936
1689 1741 1798 1886 1939 1977 1949
1720 1762 1811 1900 1952 1984 1956
1736 1779 1831 1914 1958 2007 1976
1759 1800 1842 1933 1973 2020 1995
1767 1808 1853 1937 1976 2024 1998
1798 1835 1880 1953 2001 2053 2027
1800 1844 1898 1984 2029 2093 2069
1800 1844 1898 1984 2029 2093 2069

I would say it definatly looks different than mine, this is the first part of mine up to about 4,000 rpm's before I had touched the ve tables. The entire reason I had gone tot the ve tune because when I changed my ifr rates to compensate for the excessive rich condition after the larger cam I noticed that changing that kpa varible was not rpm related. I could see that under same kpa #'s & different rpm values my fuel requirements were changing constantly.

I have had two other cams in & never bothered with doing a ve tune, I believe I overcammed now & am forced to do soo

 

i thought that you had to have a seperate software for the density tune. i have the basic hp tuners version 1.6. or can i do it with what i have.

 

Edit uses raw VE. HPT uses VE%.

02Denali, you can do it without the upgrade -- the upgrade is for a 2bar or 3bar SD setup.

 

odd, i wonder which would be more precise

 

cool. i think once me and allen get her dialed in on the dyno ill get another pcm from him and give that a go. thanks.

 

SO AM i SCREWED OR WHAT?