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Type: Posts; User: Sennin

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  1. I5 Decat with cat fooler installed - fuel consumption down the drain

    Hi There,

    my friend has done a Decat on his 3.7 I5 Hummer H3, the exhaust shop did install cat "foolers" so no check engine light errors etc, but his fuel economy has gone south. I would like to...
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    2008 Hummer H3 3.7 I5 VATS - new key

    I just got contacted by a person that lost his key to his Hummer, and had a new one cut by a locksmith, but the Hummer doesn't recognize the key and therefore doesn't start. Will it work if I...
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    found the problem. you now use a comma , instead...

    found the problem. you now use a comma , instead of a point . :cool:
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    I had my diffs re-geared from 4.1 ratio to 4.56...

    I had my diffs re-geared from 4.1 ratio to 4.56 but is unable to do the adjustment, just get an error running 3.2.143

    64229
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    apparently its something to do with the 2007...

    apparently its something to do with the 2007 model PCM GM used in the Hummer, was later changed during 2007, if you do a quick write it kicks out with an error, you have to do a full write to get it...
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    I have found that reading and writing to Hummer...

    I have found that reading and writing to Hummer H3 PCM's now takes much longer. in the past it would take 10 minutes for whole write process to complete, now it takes 45 minutes roughly the same for...
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    Go to your Trans tab > auto speed shift and then...

    Go to your Trans tab > auto speed shift and then have a look at your part throttle shift normal, here you will see your throttle position v.s shift dependant on speed, you can play around with the...
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    Really? because its populating on the older...

    Really? because its populating on the older version without a problem, plus the h3 uses the 4L60E transmission in both the V8 and the I5
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    just picked up a problem with version 3.0.55 -...

    just picked up a problem with version 3.0.55 - when I open up my Hummer H3 5.3 V8 files with the VCM editor, i see all my parameters, but as soon as I open up my H3 I5 3.7L file with the editor its...
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    So is it better to upgrade now or wait 2 weeks...

    So is it better to upgrade now or wait 2 weeks and then upgrade :p
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    Will do. Took a test drive tonight and the...

    Will do. Took a test drive tonight and the gearbox kicks down at the slightest uphill. and yet I havent changed any settings on it :banghead:
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    We have 93,95 and at the coast 97 RON. Edit, I...

    We have 93,95 and at the coast 97 RON.

    Edit, I run 95 where I stay (1600m above sea level) and go to the 97 when at the coast
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    I would still use your stock file, and just do...

    I would still use your stock file, and just do the comparison to the tuned file and copy the changes to your file, and safe it with different name to keep your stock tuning file. Then upload your...
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    Good or bad in your opinion? Hummer runs smooth...

    Good or bad in your opinion? Hummer runs smooth with no faults thus far.
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    retried this AM and now it uploads

    retried this AM and now it uploads
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    So I played around with the Hummers Tuning, and...

    So I played around with the Hummers Tuning, and hopefully somebody can assist in my way forward. Do you see any problems so far, and what recommendations would you give going forward?

    Ok first...
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    Hummer H3 5.3 V8 Tuning

    So I'm new here coming to you from South Africa, doing it for my own pleasure on my own vehicle and require some help :pray:

    I have a 2009 Hummer H3 5.3l V8 and need assistance in tuning the beast...
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