Need some quick help with MAF's - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

burninskulls0911 · 02-08-2010, 09:22 AM

So i just put an rb25 in my s13. I had the harness professionally converted by Carisma.
well the car seems to break up pretty bad once i hit full boost and i putting tons of black smoke out the exhaust when it starts to break up, which leads me to believe that it is running rich.

well i ran the part number on the MAF (22620 05U00 A36-000 J70)
and it ended up being a stock MAF from an rb26dett

now my question is, will the fact that its an rb26 MAF cause it to be running like this?

the motor is all stock besides a FMIC and freddy intake manifold..

thanks for the help
Adam

R33E8 · 02-08-2010, 10:09 AM

Have you performed a boost leak?

burninskulls0911 · 02-08-2010, 10:40 AM

Quote:

Originally Posted by R33E8

Have you performed a boost leak?

yep
not leaks at all

Mosaic · 02-08-2010, 03:03 PM

U running rich only on fullboost? If the MAF hit its limit then you would run lean, not so?

More likely at full boost your plugs arn't igniting the compressed mix properly.
I'd say go for iridium plugs to increase your voltage per discharge area. You could also sharpen you platinmus and gap em down a bit to see.....but that wo't last very long b4 they get blunt again.

burninskulls0911 · 02-08-2010, 03:12 PM

Quote:

Originally Posted by Mosaic

U running rich only on fullboost? If the MAF hit its limit then you would run lean, not so?

More likely at full boost your plugs arn't igniting the compressed mix properly.
I'd say go for iridium plugs to increase your voltage per discharge area. You could also sharpen you platinmus and gap em down a bit to see.....but that wo't last very long b4 they get blunt again.

ive been messing with it all day
and you are correct.
the plugs were gaped to .045 which is wayy too big
so i regaped them back down to about .028..
im about to take it for a test drive..

gigity · 02-14-2010, 08:49 AM

Quote:

Originally Posted by burninskulls0911

ive been messing with it all day
and you are correct.
the plugs were gaped to .045 which is wayy too big
so i regaped them back down to about .028..
im about to take it for a test drive..

The rb26dett maf is real weak I think they are only good for about 250 whp when single used fuck sr20 maf get ya better than that. Any way you look at it you should change maf.

02-08-2010, 09:22 AM	#1
burninskulls0911 Zilvia Addict Join Date: May 2008 Location: Jupiter FL Age: 35 Posts: 827 Trader Rating: (7) Feedback Score: 7 reviews	Need some quick help with MAF's So i just put an rb25 in my s13. I had the harness professionally converted by Carisma. well the car seems to break up pretty bad once i hit full boost and i putting tons of black smoke out the exhaust when it starts to break up, which leads me to believe that it is running rich. well i ran the part number on the MAF (22620 05U00 A36-000 J70) and it ended up being a stock MAF from an rb26dett now my question is, will the fact that its an rb26 MAF cause it to be running like this? the motor is all stock besides a FMIC and freddy intake manifold.. thanks for the help Adam

02-08-2010, 03:03 PM	#4
Mosaic Join Date: Feb 2010 Location: Trinidad Posts: 30 Trader Rating: (0) Feedback Score: 0 reviews	Full boost U running rich only on fullboost? If the MAF hit its limit then you would run lean, not so? More likely at full boost your plugs arn't igniting the compressed mix properly. I'd say go for iridium plugs to increase your voltage per discharge area. You could also sharpen you platinmus and gap em down a bit to see.....but that wo't last very long b4 they get blunt again.

02-08-2010, 10:09 AM	#2
R33E8 Zilvia Addict Join Date: Jul 2006 Location: NJ Age: 35 Posts: 798 Trader Rating: (14) Feedback Score: 14 reviews	Have you performed a boost leak?