Negative boost numbers (with no problems)
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Negative boost numbers (with no problems)
Just checking my understanding of the above issue, I read what I could on here about negative boost. I experience it when I leave Tucson at 2600 or so elevation and head up to Northern Arizona around 8300 feet. Or so I think, I don't watch it like a hawk.
In the absence of any performance or driveability issues, an occasional negative boost reading sounds like nothing to worry about, correct?
Thanks for any advice or comments...yeah, I am no mechanic but I try to understand all this stuff. Thanks to you blokes, I have gotten 128K relatively trouble free miles out of my truck.
In the absence of any performance or driveability issues, an occasional negative boost reading sounds like nothing to worry about, correct?
Thanks for any advice or comments...yeah, I am no mechanic but I try to understand all this stuff. Thanks to you blokes, I have gotten 128K relatively trouble free miles out of my truck.
Lead Driver
Joined: Feb 2011
Posts: 8,241
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From: L.A. (Lower Alabama)
I noticed you have a SGII in you sig. If you're watching boost with that it is sensitive to altitude/barometric pressure. Here are some correction factors if you want to try them.
Boost
TXD: 07E0221440
RXF: 046285140640
RXD: 3010
MTH: 012203200000
NAM: BST
With a little tweaking you can adjust this to read boost.
To do this, just plug in the MAP code - get a reading from it with the key in the on position but the engine off, then based on the reading changed the last 4 digits of the MTH to whatever corresponds to your reading on this table
14.0 -- FF74
14.1 -- FF73
14.2 -- FF72
14.3 -- FF71
14.4 -- FF70
14.5 -- FF6F
14.6 -- FF6E
14.7 -- FF6D
14.8 -- FF6C
14.9 -- FF6B
15.0 -- FF6A
Boost
TXD: 07E0221440
RXF: 046285140640
RXD: 3010
MTH: 012203200000
NAM: BST
With a little tweaking you can adjust this to read boost.
To do this, just plug in the MAP code - get a reading from it with the key in the on position but the engine off, then based on the reading changed the last 4 digits of the MTH to whatever corresponds to your reading on this table
14.0 -- FF74
14.1 -- FF73
14.2 -- FF72
14.3 -- FF71
14.4 -- FF70
14.5 -- FF6F
14.6 -- FF6E
14.7 -- FF6D
14.8 -- FF6C
14.9 -- FF6B
15.0 -- FF6A
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Thanks Rusty, I will check my inputs vs. what you have there. It was more than a day ago that I put all those Xgauges in, so it seems like I did enter all that stuff but I can't specifically say for sure. Getting old sucks like that...
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