Mass Air Flow Sensor

[bilaldasoo]

I have a 96 q45 and need to replace the Mass Air Flow sensor . The part number on my MAS is 22680-61U01 , but when i search for it , the result for the same car shows the part number as 22680 61U00 .
So can i replace mine with this one?
how do u read the part coding anyway?

[Infinitiguy19]

Item Number MSRP Core Price Infiniti Of Scottsdale Price
2268061U01 $631.25 $0.00 $512.89

Electrical - Powertrain control - Powertrain control - Mass air flow sensor
Mass air flow sensor, q45, from 11/94 1995 - 1996

Source: http://www.infinitipartsusa.com/partloc ... &siteid=55

[Q45tech]

Other than the electrical connection socket there is little difference in the 90-96 MAF.............x grams of air flow creates y volts [0.8> 4.4 volts].

They appeared to have tried to tweek the no flow/cranking flow vs voltage to be more stable and repeatable but not sure they accomlished much.

Always try a good known used MAF [even if you have to jury rigg the 3 wires temporarily before spending $500 on a new one............careful shorts which send 12volts to ecu expecting < 5.0 volts can fry ecu so make sure you know what you are doing!!!!!

[bilaldasoo]

I Had a discussion with the service guy at the infiniti dealership, what he said was ,to sum things up, both of these cannot be used interchangeably , even if the connector is changed.Apparently the programming for both of these is different.

TO make matters worst..i cannot find an old MAF of my car..the 22680-61U01 kind ..and there are A LOT of 22680-61U00 out there on ebay and else where.

[Q45tech]

The question is exactly how much did they change the curve. The lower peak flow of the 96 is probably only a few %. 5% at most and nothing at idle or cruise.

Create a flow vs voltage graph and see what the changes might entail.

The important thing is that the MAF matches displacement.

[bilaldasoo]

i am def not this technical as you are. All i know so far is 96 model had two kinds...one is with 3 pins the other with 4 pins...and to my luck i have the rear 4 pin one .

Btw...(and here you would know how technical i am ) what will happen if i just unplug the darn thing... would it only increase the fuel consumption or would the car wont work at all and would be bad for the car?

[Infinitiguy19]

I don't understand what the whole problem is just find the correct MAF sensor whether new, used, OEM or after market and stick with it.

1990-early 1995 had OBD1 sensors (MAF sensors) late 1995-1996 G50's had OBD2 type MAF sensors.

If you unplug it (based off of dealing with OBD1 Q45's) your engine will not rev past 2000 RPM's.

[Q45tech]

It might crank but rpm would be limited to 2000 [fail safe].

Study FSM if 4th pin is just an integrated "intake air temp sensor" you could modify [jury rig something] on a pre 96 MAF.

Sure the 4th pin is not just a "shield" connector.

We haven't seen a 1996 in 2 years and our FSM is lost.

[King Charles]

This is odd when looking to replace my MAF sensor I see the 4 pin & 3 pin up for my '96. Yet I check mine the female side(brown & orange) has 4 slots yet on the sensor itself has only 3 prongs/connectors ?! Did one break off (it's not inside the receptacle I checked) ?

The plot thickens lol.