Thread: How well is your MAF performing?

Update:
Found that most of the JDM MAFs will work ! !
Just requires the verification part number on the label with the US part number to identify the MAF. Most are DE MAFs from my discussions with JDM motor dealers.. Was hoping to find the equivalent Z32 JDM MAF..

Not exactly true actually, if you look at post 23, you will see that E60, N60/N62 all flow minimum of 1.0v at idle, while DE MAF and RR MAF flow minimum of 1.3v...

yes but my point is that you should see 1.0v+ on a 6 cylinder engine. i doubt that my 4 cylinder 2.0 engine sucks in the same amount of air as a 6 cylinder 3.0 does. hence why it may fall out of spec from the fsm.

I understand what your saying, but don't a V6/V8 idle at lower RPM's too?

I voltage tested my Parent's 96 Maxima that seems to be driving fine, it had a very constant 1.2v at idle. Mine jumps from 1.07-1.11v hehe

Agreed Vadium. V6/V8 idle at much lower rates. My Q45 idles smoothly between 500-600 RPM.
But these older 4 bangers requires a much higher idle (especially when boosted or with cams).

MAF Discoveries

1. The Low MAF Voltage Enrichment Trigger constant must be lower than the MAF minimum voltage... Period... Setting the Trigger to .7 should be safe and the Nissan MAFs are all at least 1.0v or higher.

2. Also, we also found that the MAF should not have turbulant air as this causes MAF voltages to jump around (both above & below 1.0v). Setting the Trigger to .7 will also correct this problem.

3. Any Nissan MAF running below 1.0v at idle should be considered out-of-spec (useful life has ended) and should be replaced.

These rules have been found critical for a smooth non-hunting idle & to help remove hesitation caused by the ECU attempting MAF corrections.

is it possible that this problem could also effect the voltage on the max side too, and that it could need lowered? has anyone checked into that?

what is max side voltage?

i couldn't find a stated max value in the pdf manual but the bin file i have from calum has 4.9V input (which i would assume is because of the 5V signal).

searching the old forum i found that the ecu can only read up to 5.08V so that's all the maf would need to read up to i guess. check our maf's we'd probably have to blow through them and meter it.

this must be a Nissan thing. all the v8's i have owned none being Nissan idle at 800 rpms such as my Bullitt. if this is true then you can def throw some of my thoughts out the window lol.