Still having MAF problems.

[nb07bcar]

No one really responded to my question so I'll ask it again . What is everyones MAF air flow readings on thier safc2 at idel. Mine is at 3% sometimes its at 2%, .8% or .5%. I am having problems also at very low throttle position. My car goes lean and then rich at around 10% throtle. The car starts jearking around and right at the postion to keep my car cruzing down the road. Anyone have any ideas?

[Jookmasta]

um whats ur setup again? i personally get below 1% on the airflow reading at idle. does it idle smoothly? whats ur vacuum at idle? whats ur vacuum at when ur cruising? i highly doubt its ur plugs, but what plugs are u running and what are they gapped at?

[nb07bcar]

um whats ur setup again? i personally get below 1% on the airflow reading at idle. does it idle smoothly? whats ur vacuum at idle? whats ur vacuum at when ur cruising? i highly doubt its ur plugs, but what plugs are u running and what are they gapped at?

I'm running stock internals. 42lb injectors, safc2 wideband plx-300. boosting from 6-10 psi, msd 6 btm. It idles just fine but a little rich, like 13, and I cant get it down any lower than that. My vacume at idle is -20 inhg and around at cruzing ist anywhere from -10-0 inhg. My plugs I think are nkg 11 I think. gaped .035. I'm just cruzing and if I'm not on the gas like trying to excelerate it runs at 14.7 or so and then goes compleatly lean and then goes back to 14.7. And it just keeps doing it untill I start to excelerate more. My maf was in a car that was in a wreck and had the airbox go through it, so that might be the first place to start. ALso stock maf and ecu. just wanted to get some input if anyone else has had this problem before I go spend $125 of a z32 maf. I really don't need the maf because my power goal is only around 250

[nissanfanatic]

Plugs shoudl be:

BKR5E-11BKR6E-11BKR7E-11

One of those. If you want your engine to last, it should be either 6 or 7.

Are you running an open atmosphere BOV or is it recirculated? Those low throttle problems are typically open atmosphere BOV related.

Readings on my setup aren't very applicable to your setup, but I go to like 1.3%-1.4% on startup and end up around .5%-.6% after its warm.

[nb07bcar]

Plugs shoudl be:

BKR5E-11BKR6E-11BKR7E-11

One of those. If you want your engine to last, it should be either 6 or 7.

Are you running an open atmosphere BOV or is it recirculated? Those low throttle problems are typically open atmosphere BOV related.

Readings on my setup aren't very applicable to your setup, but I go to like 1.3%-1.4% on startup and end up around .5%-.6% after its warm.

Its a recirculating BOV. The plugs are 1 degree cooler than stock. I think thats 7. Why would the BOV have anthing to do with a low throtle position? Its not being used at low throtle. So your readings dont fluctuate? I get all sorts of different readings when I am at idle. Sometimes at 3% and sometimes at .8%. I might just by a z32 maf and see if that fixes it. No one else on the forum has answered with any ideas. so I guess no one has had these problems.

[nissanfanatic]

Because at low throttle positions(high vacuum) the BOV can open allowing air to exit or enter unmetered. So Rich or lean conditions can occur.

Have you tried cleaning the MAFS or considered it is something else? Like maybe O2 sensor...

[Jookmasta]

i would try to get a hold of another stock maf just to try and see if it is the maf. if u dont want to buy the z32, im sure there must be some other 240 within ur vicinity that u can just try their maf to see if that is the issue. it may have been damaged from the accident but i guess none of would really know. i would personally lower the gap to about .30 with ur setup btw.

[nb07bcar]

Its a brand new O2 sensor. So I don't think its that.

[NateDogg]

Sound almost like your throttle position value is messed up. Have you set it and does it sweep properly? Also maybe try different in and out settings?

[nb07bcar]

the throttle postion sweps fine. I will try another in out position. have any sugestions?