05-21-2009, 11:40 AM
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| Senior Member
Join Date: Aug 2005 Location: Ohio, near columbus
Posts: 1,068
Car: 89 iroc-z Engine: 305tpi Transmission: wc-t5 Axle/Gears: 10 bolt 3.08 posi (4 now) | maf diagnostics
well i am pretty new to diagnostics and even newer to a maf based system. i've got a 1989 camaro iroc-z 5.0 5 speed. its a nice car ,but it runs pretty rough unfortunately. so i figured i'd hook up a scanner to it and see what i can find out. Everything seems to be in check except i'm not realy sure how the maf works and would like a quick description to see where i should go next with this.
so question #1 is the maf sensor a 0-5 volt sensor like most of the others in the engine bay? Should i see a lower voltage reading for less incoming air and higher for more incoming air?
question #2 around how high would a full bolt on 305 peak the mafs airflow if i matted it under a high load, i do know max is 255g but mine doesnt seem to go anywhere near that high.
also 1 other question the block learn is what i should be looking at for long term fueling correct? perfect is 128 i do believe ,but if higher does that mean im richer or leaner? | | |
__________________ mods: 176/166* fan switch, 180* thermostat, airfoil, k&n airfilters, edelbrock headers, 3in borla catback, 22#injectors, afpr, gutted maf, aluminum driveshaft, bmr stb, msd coil, 1.6 ratio roller rockers, march 2 peice underdirve pulleys, proform distributor, aluminum waterpump, ministarter, msd coil,
soon to have siamesed polished upper plenum, siamesed base, crane 2032 camshaft and ported 416 casting heads. http://www.cardomain.com/ride/3227299 |
 
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