Emergency MAF Bypass

[Raxephon]

I was skimming through ebay and came across the following:

http://cgi.ebay.com/ebaymotors...wItem

Now I know this is useless performance wise, but could it be used as a last resort if the MAF craps out completely?

(ie, something just to get you home)

According to the ad its basicly a 4300 ohm resistor inserted into the power wire & signal wire on the MAF plug.

Edit: Not sure if it should be in IOM or Engineering, but its Infiniti based, so I posted here.

[RobertsnewQ]

Sure, but don't expect anything like driveability. You'll basically have a crude, Alpha-N system.

[Q45tech]

Newer models intergrate the air intake thermistor into MAF assembly.The ecu trims the fuel based on air temp. 1% per 11F from a norm of 60F.

At WOT where HP is created the ecu already provides too much fuel.

In summer heat the ecu increases fuel and decreases ignition advance based on air and coolant temp plus AC on signal [plus fuel temp in tank] to compensate for knock possibilities.

Depending on fuel refined that day [each batch has it's own knock/temp curve] you might lose or gain some tiny amount.

If I was creating something, I would make a multiposition [3 position switch] system, that would let ecu see normal sensor and trim it 30F warmer in winter and 30F cooler in Summer.

You might find that ecu responds to warmer simulation in cold weather all depends on the gasoline that day.

[Q45tech]

The integrated MAF is very very expensive and it's flow at idle is individually trimmed [calibrated] to match ecu............you cannot change newer MAF wothout going thru a relearning process with Consult II.

[texasoil]

What the guy is sellin gon EBAY is a 'resistor' that replaces the coolant temp sensor, fixing it at less than 174F.

MAF are automatically self correcting for air temperature--they are measuring the MASS flow, not Volume flow. THE ECM needs MASS flow of air to set proper fuel flow rate.

[Raxephon]

What the guy is sellin gon EBAY is a 'resistor' that replaces the coolant temp sensor, fixing it at less than 174F.

MAF are automatically self correcting for air temperature--they are measuring the MASS flow, not Volume flow. THE ECM needs MASS flow of air to set proper fuel flow rate.

....ALL YOU DO IS INSTALL IT IN YOUR IAT SENSOR!....uses a resistance value of 4,500 ohms to override the sensor and signal the computer that it is receiving air at an optimal temperature of 62 degrees.

Last time I checked , the only IAT ( Intake Air Temperature) Sensor on the early Q45 was in the MAF.

A mass airflow sensor (MAF) determines the mass of air flowing through a conduit. This is generally achieved by using heated wires in the airstream. By knowing the temperature of the air (generally through an intake air temperature sensor) and the resistance in the wire, the MAF can determine how much mass is flowing.

If this is incorrect, please explain.