Dead Hitachi MAF?
04-24-2005, 11:58 AM
#1
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Dead Hitachi MAF?
Been struggling with fixing some issues with my car today. You know, that old "doesn't feel right" problem. Couple of logs, block 115 & 003. My 115 log is way better than it was 2 weeks ago, when I was spiking at 1.7bar (yikes). Still need to get the MBC installed to smooth it out a little. Block 003 looks way too low for an X chipped car.
<img src="http://pictureposter.audiworld.com/77913/boostlog.jpg">
<img src="http://pictureposter.audiworld.com/77913/maf.jpg">
Dead MAF?
ps. 55 degrees out, 5600ft above sea level.
<img src="http://pictureposter.audiworld.com/77913/boostlog.jpg">
<img src="http://pictureposter.audiworld.com/77913/maf.jpg">
Dead MAF?
ps. 55 degrees out, 5600ft above sea level.
04-24-2005, 12:11 PM
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So you subtracted .8bar from your boost graph I assume? Just checking.
That airflow does seem low to me, but I haven't seen many logs at such high elevation. Furthermore, I've always heard Hitachi MAFs read artificially high when failing.
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04-24-2005, 12:22 PM
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90%-95% I'd say after looking at my K03 X chip boost graphs.....
Pay attention to the requested boost curve, not the actual (1st is MBC in parallel and 2nd is MBC only holding 1 bar to redline). Notice that my graphs taper below 1 bar quite a bit before yours in the RPM range and requested boost across the RPM range is lower on my graphs as far as I can tell.....
<img src="http://pictureposter.audiworld.com/69223/block_115-mbc_and_n75_in_parallel.jpg">
<img src="http://pictureposter.audiworld.com/69223/block_115-mbc_only-57d.jpg">
<img src="http://pictureposter.audiworld.com/69223/block_115-mbc_and_n75_in_parallel.jpg">
<img src="http://pictureposter.audiworld.com/69223/block_115-mbc_only-57d.jpg">
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