Mass air flow sensor - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

MyFirst240SX · 12-27-2001, 10:26 AM

When u put a cold air intake, dont u take off the mass air flow sensor? then what exactly does that thing do
sean

*ca18guy* · 12-27-2001, 10:44 AM

You don't remove the MAF with an intake. The MAF measures the amount of air entering the engine, from that measurement the ECU decide's how much fuel for the injectors to flow. So with out it your car won't run (or will run extremely poor)

gfisch · 12-27-2001, 11:16 AM

Yeah, i dont think the car wilkl run at all without it. The instructions for the intake I bough very clearly stated NOT to have the MAF unplugged when there was power to the ECU (car on) because it wouldn't run and youd have to reset it.

whateverjames · 12-27-2001, 12:22 PM

you may be thinking of the air temp sensor.

(Edited by whateverjames at 3:30 pm on Dec. 27, 2001)

MyFirst240SX · 12-27-2001, 12:24 PM

I was refering to the metal part of the pipeing located near the end of the intake pipe

S14KAT · 12-27-2001, 03:05 PM

Ok, I blew my MAF one day.....I'm not getting ito details, lets just say good intentions, stupid idea thats all.  Anyway, the car did run, but like total shit.  The car would only rev to about 2500 rpms and then would jerk back and forth like crazy.  From what I was told, the ECU got all F'd up when it couldn't read the air intake properly, and automatically went into whats called "limp home mode".  Basically, you can drive the car, but on an extremely limited basis.  Its just enough to get your slappy ass back home to get the prob fixed.  DO NOT MESS WITH IT!  Those things are extremely sensitive to heat, cold, and just about everything else.  The element which reads the air coming in is extremely sensitive.

12-27-2001, 10:26 AM	#1
MyFirst240SX Zilvia Junkie Join Date: Dec 2001 Posts: 599 Trader Rating: (0) Feedback Score: 0 reviews	When u put a cold air intake, dont u take off the mass air flow sensor? then what exactly does that thing do sean __________________ It is better to drive a Slow car fast than to drive a fast Car slow! '89 FastBack 5spd: Intake/Exhaust,Strut Bars and JL15. '90 Parts car/Some day drag car.

12-27-2001, 10:44 AM	#2
ca18guy Premium Member Join Date: Jul 2001 Location: Clearwater FL Age: 41 Posts: 3,226 Trader Rating: (0) Rides Gallery: ca18guy Feedback Score: 0 reviews	You don't remove the MAF with an intake. The MAF measures the amount of air entering the engine, from that measurement the ECU decide's how much fuel for the injectors to flow. So with out it your car won't run (or will run extremely poor)

12-27-2001, 11:16 AM	#3
gfisch Zilvia Junkie Join Date: May 2001 Location: Warren,NJ / Baltimore,MD Age: 43 Posts: 576 Trader Rating: (0) Feedback Score: 0 reviews	Yeah, i dont think the car wilkl run at all without it. The instructions for the intake I bough very clearly stated NOT to have the MAF unplugged when there was power to the ECU (car on) because it wouldn't run and youd have to reset it.

12-27-2001, 12:22 PM	#4
whateverjames Nissanaholic! Join Date: Jul 2001 Location: St. Louis Age: 44 Posts: 2,263 Trader Rating: (0) Feedback Score: 0 reviews	you may be thinking of the air temp sensor. (Edited by whateverjames at 3:30 pm on Dec. 27, 2001)

12-27-2001, 12:24 PM	#5
MyFirst240SX Zilvia Junkie Join Date: Dec 2001 Posts: 599 Trader Rating: (0) Feedback Score: 0 reviews	I was refering to the metal part of the pipeing located near the end of the intake pipe

12-27-2001, 03:05 PM	#6
S14KAT Leaky Injector Join Date: Dec 2001 Posts: 123 Trader Rating: (0) Feedback Score: 0 reviews	Ok, I blew my MAF one day.....I'm not getting ito details, lets just say good intentions, stupid idea thats all.  Anyway, the car did run, but like total shit.  The car would only rev to about 2500 rpms and then would jerk back and forth like crazy.  From what I was told, the ECU got all F'd up when it couldn't read the air intake properly, and automatically went into whats called "limp home mode".  Basically, you can drive the car, but on an extremely limited basis.  Its just enough to get your slappy ass back home to get the prob fixed.  DO NOT MESS WITH IT!  Those things are extremely sensitive to heat, cold, and just about everything else.  The element which reads the air coming in is extremely sensitive.