I read this saying about a MAF sensor and was wondering if it true.
" GPS number on a good MAF will equal the engine’s displacement in liters at idle speed. In other words, 3 GPS at idle would be correct on a 3L engine. "
I have a 03 Toyota Tacoma 3.4L. I cleaned my throttle body last week because of a low idle condition @ 535ish or under 650/750. It took about 25 miles to relearn so now I'm idling a little above 750 rpms. I put a bottle of 44K in the tank to clean the injectors a little. My MAF readings was about .54 g/s before the throttle body cleaning "using the Blue Driver" So I was on the hwy yesterday and kinda gunned the pedal down to about 3500-4000 rpms, when I came to a stop I noticed that the MAF numbers were about 5.40 g/s. Fuels trims are perfect, way below the 10% mark. I havent had the time to put my Verus on it to compare. I'm just trying to figure out what happen for it to go from .54 g/s @ idle to 5.6 or so just from that pedal stomp. So I read that quote and was wondering if that is somewhat true.
1 gps per Liter is a widely accepted general Rule-of-Thumb. It is not specification. Many factors will make this vary. A 4.0L with 5 gps ,at idle, is nothing to be too concerned about. But a 2.0L with 8 gps is a little suspicious. Likewise, I would question 0.54 gps on a 3.4L.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer." I have learned more by being wrong, than I have by being right.
If anyone needs the specs on a 03 Toyota Tacoma 3.4L (5VZ-FE) MAF specs.
Air flow rate from MAF sensor/ Min. 0 gm/s, Max. 655 gm/s
Idling 3.3 - 4.7 gm/s @ idle " May have to reposition my TPS " I'm @ 5.6
Racing w/o load (2500) 12.9 -18.3 gm/sec
Idling 650-750
