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Minotaur Automotive Tuning Software Tune your own 7.3L Diesel! If you have a question or comment about Minotaur? Post it here. Also, check out our Facebook group: Facebook - Minotaur Tuners |
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#1
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Ok, I can't figure this out.
I can run up to 30 psi of boost, and have no overboost code. Yet yesterday I was hitting at least 35 psi of boost at the track (might have been more, my gauge only goes up to 35 psi) and it set the overboost code every time. I don't get it. First, I thought the MAP sensor was already well out of it's range before 30 psi, so why would it trigger at over 30 psi, but not at or just under? Second, where is the switch to just completely disable any ability for it to register a trouble code for overboosting? I thought I took care of that already, but apparently not. |
#2
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What year truck? The '94-'97 trucks won't set the code or defuel until the 35+psi range.
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#3
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Mine is a 2002
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#4
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I remember reading a while ago about the issue you are talking about pocket. I think it was TDS or maybe PSN. I think it was the thread that Matt came up with a different Map sensor that gos to 3 bar instead of the 2.5 bar or something like that?
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#5
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There are a few things to look at and from what I have seen and had to deal with over the past, you may or may not be able to "fix" this. Here are some hints anyway:
Turn off the MAP enable switch. This will cause your boost/fueling to follow the inferred boost map. Change the MAP operating range high to "1023". To go with this, you can change the MAP transfer function as well. Heck, if you get so inclined, there are quite a few MAP and EBP maximum pressures and time parameters you can raise as well.
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Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes. SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory! Last edited by cleatus12r; Wed, August 17th, 2011 at 12:23 PM. |
#6
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Thanks for the info. I'll report back on what changes work when I get a chance to test them. |
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