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Could the MAF be the culprit to all my problems?

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Old 10-22-2003, 06:45 AM
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Default Could the MAF be the culprit to all my problems?

ie. running rich, boost spikes, too much boost (sometimes 25psi steady)

see for yourself...

<img src="http://1.8t.org/~vk/misc/watkinsglen/smoke-1.JPG">
<img src="http://1.8t.org/~vk/misc/watkinsglen/smoke-2.JPG">
<img src="http://1.8t.org/~vk/misc/watkinsglen/smoke-3.JPG">
<img src="http://1.8t.org/~vk/misc/watkinsglen/smoke-4.JPG">
<img src="http://1.8t.org/~vk/misc/watkinsglen/smoke-5.JPG">
<img src="http://1.8t.org/~vk/misc/watkinsglen/smoke-6.JPG">
Old 10-22-2003, 07:27 AM
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Default MAF could cause the richness...

Boost spikes and the 25psi could be N75. Try cleaning your MAF before replacing it. Then if you still get spikes and high boost, investigate the N75.
Old 10-22-2003, 07:44 AM
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Default you sure you're not consuming oil? take off the s-pipe/throttle body hose

and see if youre dripping wet
Old 10-22-2003, 08:02 AM
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Do 98.5 have an N75?
Old 10-22-2003, 11:46 AM
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Yup
Old 10-22-2003, 11:47 AM
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Default No...the MAF is out of the loop at WOT...

...it's all a map for the N75 at that point.

Mike O.
Old 10-22-2003, 12:34 PM
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I thought the MAF was in play, and the O2 was on the bench at WOT?
Old 10-22-2003, 12:56 PM
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blue smoke... seems like you are burning oil
Old 10-22-2003, 01:23 PM
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Thats what I thought !?!
Old 10-22-2003, 05:23 PM
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Default Not for fuel mixture it's not....

Load is calculated from MAF and RPM, then there is a lookup table using Load and RPM to figure out the injection amount.

Higher MAF = Higher Load = More Fuel

I think the N75 is controlled more by RPM and Throttle Position


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