1997 nissan altima maf sensor HELP!!!!!!!!!!!!

[HEI-RON]

whats the hazrds of driving an altima without a maf sensor

[SHIFT_COUPE]

You really can't drive the car without an MAF sensor. The car should bog and act completely funny. You'll also get a CEL probably.

[adidas2go]

Im not sure how these computers are but in my 03 bmw if you unplug the MAF the computer reverts back to its last good A/F ratio and runs the same, but throws a lgiht saying the MAF is bad. Also did the same thing on my 03 eclipse spyder when i put a turbo kit on it and took the MAF outta the equation. The direct affect will be gas mileage. A minor change probably for the worse. The secondary affect will be hp gains. Your engine will run at a constant A/F ratio instead of changing the ratio based on the intake of air. So sometimes your will run rich and sometimes lean. Instead of the constant right mixture. I think thats about it. I wouldnt disconnect it tho unless its for a turbo install or something FI.

[theanswer]

my 97 maxima wouldnt go past 2500 rpms with the maf wiring disconnected or with a bad maf.

[generic808]

You're gonna get very, very rough idling and you're RPM's will jump all over the place, most likely causing your car to die-out.

[2008CodeRedCoupe]

your car should idle really low, and not accelerate much at all!

[adidas2go]

really? nissans shut down that much without a MAF?

[Darius]

Yep the ECU doesn't know how much air is coming into the engine and it therefore does not know how much fuel to dump in. I guess Nissan engineers decided that not a whole lot of damage could be done if the safe-mode rpm limit was 2500-3000. Especially if you were installing a turbo, you'd need a MAF or convert to a MAP based system but we're talking serious upgrades here on an altima. Not a huge market for that kind of thing. It would be a totally custom setup.

As for the BMW, I'm not sure but that system could have had both MAF and MAP sensors. I know the RB26 is like that. There's some extra calculation for load that the ECU uses inputs from both types of sensors.