Is my MAF any good? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

\\'angan · 01-10-2008, 09:49 PM

How do I check to see if my MAF sensor on my RB20DET is any good?

SidewayZ-s14 · 01-10-2008, 09:53 PM

Does it rev past 2300 rpms while connected?

sleepy_s13 · 01-10-2008, 10:35 PM

Quote:

Originally Posted by SidewayZ-s14

Does it rev past 2300 rpms while connected?

Doesnt necissarily mean that its good if it does.

I just changed mine, My car was idiling like shit. It runs smooth now.

SidewayZ-s14 · 01-10-2008, 10:59 PM

Well yeah true, just a heads up.

btw, your car is bad ass. I want a coupe soo bad!

My car idles like shit also! When i start it it goes straight up to about 1500rpms then falls drastically down to about 200rpms! The whole car shakes and what not.

sleepy_s13 · 01-11-2008, 09:58 AM

Quote:

Originally Posted by SidewayZ-s14

Well yeah true, just a heads up.

btw, your car is bad ass. I want a coupe soo bad!

My car idles like shit also! When i start it it goes straight up to about 1500rpms then falls drastically down to about 200rpms! The whole car shakes and what not.

Thanks. Ive never had that problem before. Mine would idle at about 950rpms and just stumble every few seconds.

punxva · 01-11-2008, 11:20 AM

or while the car is running, unhook it, and if you don't notice the motor run different, then the maf is bad

Rusker · 01-11-2008, 02:22 PM

Check it with a Mulitmeter.

theslow1 · 01-11-2008, 06:12 PM

how do you check it with a multi meter out of curiosity

((sr)) kelly · 01-11-2008, 07:02 PM

Quote:

Originally Posted by punxva

or while the car is running, unhook it, and if you don't notice the motor run different, then the maf is bad

Do this^^^

thedecapitator · 01-11-2008, 07:54 PM

Quote:

Originally Posted by ((sr)) kelly

Do this^^^

where u being sarcastic? just wondering..

racepar1 · 01-12-2008, 01:53 AM

MAF's are extremely difficult to test. You can hook up a multimeter and read the voltages at certain RPM's. Some cars have voltage specs. But the only real way to see what the sensor is doing is to hook up a lab-scope to it. For those not in the know, a lab scope is a machine that you hook up to an electrical circuit. It has a graphing function and displays the voltage in a graph in real time, so you get an accurate picture of what the sensor is doing. Some MAF sensors send voltage signals, but most send a waveform signal. This means that the way you tell how the sensor is performing is by the heighth of the waves and the distance between the top of the waves.

\\'angan · 01-12-2008, 02:49 PM

Quote:

Originally Posted by racepar1

MAF's are extremely difficult to test. You can hook up a multimeter and read the voltages at certain RPM's. Some cars have voltage specs. But the only real way to see what the sensor is doing is to hook up a lab-scope to it. For those not in the know, a lab scope is a machine that you hook up to an electrical circuit. It has a graphing function and displays the voltage in a graph in real time, so you get an accurate picture of what the sensor is doing. Some MAF sensors send voltage signals, but most send a waveform signal. This means that the way you tell how the sensor is performing is by the heighth of the waves and the distance between the top of the waves.

do you mean an ociliscope? anyways those are extremely rare to come across and, and cost a few thousand dollars

thedecapitator · 01-13-2008, 10:56 PM

Quote:

Originally Posted by racepar1

MAF's are extremely difficult to test. You can hook up a multimeter and read the voltages at certain RPM's. Some cars have voltage specs. But the only real way to see what the sensor is doing is to hook up a lab-scope to it. For those not in the know, a lab scope is a machine that you hook up to an electrical circuit. It has a graphing function and displays the voltage in a graph in real time, so you get an accurate picture of what the sensor is doing. Some MAF sensors send voltage signals, but most send a waveform signal. This means that the way you tell how the sensor is performing is by the heighth of the waves and the distance between the top of the waves.

ooookay so what waveform are u suppose to look into??

and when u unplug the injectors 1 by 1 to check if theyre going bad do you just unplug the connections??
thanks

Slidewayz Inc. · 01-14-2008, 10:14 AM

if it runs like crap its bad change it and see the differnce

01-10-2008, 09:49 PM	#1
\\'angan $\\'angan's Avatar$ Join Date: Aug 2007 Location: Florida Age: 36 Posts: 34 Trader Rating: (0) $\\'angan is an unknown quantity at this point$ Feedback Score: 0 reviews	Is my MAF any good? How do I check to see if my MAF sensor on my RB20DET is any good? __________________
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01-11-2008, 02:22 PM	#7
Rusker Zilvia Junkie Join Date: Feb 2004 Location: Washington Posts: 351 Trader Rating: (0) Feedback Score: 0 reviews	Check it with a Mulitmeter. __________________ 1990 S13/SR20

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01-10-2008, 09:53 PM	#2
SidewayZ-s14 BANNED Join Date: Nov 2007 Location: SoCal 714 Posts: 1,061 Trader Rating: (14) Feedback Score: 14 reviews	Does it rev past 2300 rpms while connected?

01-10-2008, 10:59 PM	#4
SidewayZ-s14 BANNED Join Date: Nov 2007 Location: SoCal 714 Posts: 1,061 Trader Rating: (14) Feedback Score: 14 reviews	Well yeah true, just a heads up. btw, your car is bad ass. I want a coupe soo bad! My car idles like shit also! When i start it it goes straight up to about 1500rpms then falls drastically down to about 200rpms! The whole car shakes and what not.

01-11-2008, 06:12 PM	#8
theslow1 Join Date: Dec 2007 Location: wisconsin Age: 38 Posts: 6 Trader Rating: (0) Feedback Score: 0 reviews	how do you check it with a multi meter out of curiosity

01-12-2008, 01:53 AM	#11
racepar1 Post Whore! Join Date: Jul 2007 Location: Simi Valley, CA Age: 38 Posts: 9,006 Trader Rating: (106) Rides Gallery: racepar1 Feedback Score: 106 reviews	MAF's are extremely difficult to test. You can hook up a multimeter and read the voltages at certain RPM's. Some cars have voltage specs. But the only real way to see what the sensor is doing is to hook up a lab-scope to it. For those not in the know, a lab scope is a machine that you hook up to an electrical circuit. It has a graphing function and displays the voltage in a graph in real time, so you get an accurate picture of what the sensor is doing. Some MAF sensors send voltage signals, but most send a waveform signal. This means that the way you tell how the sensor is performing is by the heighth of the waves and the distance between the top of the waves.

01-14-2008, 10:14 AM	#14
Slidewayz Inc. In time-out for misbehaving. Join Date: Jan 2008 Location: Wellington Posts: 92 Trader Rating: (0) Feedback Score: 0 reviews	if it runs like crap its bad change it and see the differnce