incognito Posted January 3, 2004 Share Posted January 3, 2004 I got the wiring diagrams drawn up by hand.. PM me whoever wanted to know how to change the SPFI MAF to the MPFI MAF. basically goes: SPFI MAF - unused, R, B, W MPFI MAF - LgR, R, B, BR, W, unused. R, B, and W are the same for the ECU... power, ground, signal Lgr (light green and red) is for the burn-off signal from the burn-off relay. BR (black and red) is for the (i think) burn off signal ground. Key points: SPFI doesn't recognise this burnoff mode. MPFI does. The burn-off relay is supposed to activate for 4 seconds after the ignition shuts off only after being in closed loop operation. Closed Loop, meaning, fully warmed up. What it does is the hot-wire in the MAF accumulates build up throughout operation. When you turn your car off, for 4 seconds, the burn-off mode is operative. Basically heats the hot-wire up to 1000 degreez or so to burn-off that grime. Like I said.. Burn-off mode isn't present in SPFI (that i know of). Take the R, B, and W wires and run em to the correct locations. Ground off (BR) wire to a ground location. Quote Link to comment Share on other sites More sharing options...
incognito Posted January 3, 2004 Author Share Posted January 3, 2004 . Quote Link to comment Share on other sites More sharing options...
incognito Posted January 3, 2004 Author Share Posted January 3, 2004 bump again. Quote Link to comment Share on other sites More sharing options...
bushbasher Posted January 3, 2004 Share Posted January 3, 2004 sweet cause I have an mpfi sensor around, I guess that would be a bit of a flow improvement. Quote Link to comment Share on other sites More sharing options...
incognito Posted January 3, 2004 Author Share Posted January 3, 2004 thats an understatement... Quote Link to comment Share on other sites More sharing options...
bushbasher Posted January 3, 2004 Share Posted January 3, 2004 ya cause the spfi one has a what... 3/4" hole in it? Quote Link to comment Share on other sites More sharing options...
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