When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
Just started the car for the first time after a 3.5 year build and now the MAF isn’t getting any Hz. Any ideas what could be the issue? Swapped the MAF with another one and still no power. IAT is working though. Any help or ideas would be appreciated.. thanks!
Without even looking at a wiring schematic MAF sensors use 3 wires…a 12 volt feed (pink), a signal (yellow), and a black or black/white ground…the power is normally fed through an emissions fuse and that fuse is usually powered by a powertrain ignition relay…with the engine running do you see 12 volts on the pink wire ??…with a 12 volt test light connected to B+ does the test light illuminate when probing the ground wire ??…do you see a 5 volt reference voltage on the yellow ??
Without even looking at a wiring schematic MAF sensors use 3 wires…a 12 volt feed (pink), a signal (yellow), and a black or black/white ground…the power is normally fed through an emissions fuse and that fuse is usually powered by a powertrain ignition relay…with the engine running do you see 12 volts on the pink wire ??…with a 12 volt test light connected to B+ does the test light illuminate when probing the ground wire ??…do you see a 5 volt reference voltage on the yellow ??
I saw a read up of this but my voltmeter isn’t reading anything. Would it pick up power by just touching the wires? Or I have to get metal contact to the actual wire?
Is it possible the thermostat for the g speed dual oil coolers is messing with it? I have the thermostat plugged into the #14 fuse and that’s the emissions.
I saw a read up of this but my voltmeter isn’t reading anything. Would it pick up power by just touching the wires? Or I have to get metal contact to the actual wire?
No, touching the wire won’t work so you have to get contact to the metal terminal !!
Is it possible the thermostat for the g speed dual oil coolers is messing with it? I have the thermostat plugged into the #14 fuse and that’s the emissions.
You DON’T want to have this kind of stuff tapped into the emissions fuse !!…BAD BAD IDEA !!…remove it and retest !!
G speed specifically says to use that fuse area for the oil cooler thermostat. I’ll ask them where else I can plug it into because that’s not gonna work. Thanks for mentioning the emissions!
Originally Posted by C5 Diag
You DON’T want to have this kind of stuff tapped into the emissions fuse !!…BAD BAD IDEA !!…remove it and retest !!
On my 2008 you can see that the fuse 14 power splits off and feeds the MAF sensor and also the EVAP Purge Valve…so now you have 3 components drawing power from the fuse.
On my 2008 you can see that the fuse 14 power splits off and feeds the MAF sensor and also the EVAP Purge Valve…so now you have 3 components drawing power from the fuse.
I don’t have the evap purge valve anymore. Everything emissions has been completely removed. So would just 2 be fine from that circuit?
04-28-2024, 08:47 PM
No power to MAF
