Thread: SIGNS OF A BAD MAF sensor

ok when my car is on and running and after i unplug the cable to the maf sensor it turns off, is this normal? shouldn't the car stay on and just have a bad idle?

would this mean i have a bad sensor?

i think if the ecu cant read any air coming in it turns off.... i know wen i undo the entire mafs from the intake while its runninf its turned off on me too.....


the tps does what you said...idles weird when unplugged

if the mafs is bad theres is a way to check it by voltmeter which i need to do....i m not sure where the method to test it is at....

yeah i dont know either, this is supposed to be the second maf in 3 months and its acting differently that the first time, first time it wouldnt rev past 3k and now its not staying on and idleing really bad. I dont want to think that its my ecu that its messed up, theres a problem either on the ecu's end or on the maf.

this is what my car sounds like at the moment

http://s160.photobucket.com/albums/t186/nighshifters/?action=view¤t=0629092054a.flv
http://s160.photobucket.com/albums/t186/nighshifters/?action=view¤t=0629092054.flv
http://s160.photobucket.com/albums/t186/nighshifters/?action=view¤t=0629092051.flv
http://s160.photobucket.com/albums/t186/nighshifters/?action=view¤t=0629092050.flv
http://s160.photobucket.com/albums/t186/nighshifters/?action=view¤t=0629091948.flv

Test it. Make sure you ground it as per the se-r.net maf regrounding writeup, then read this:
http://www.sr20-forum.com/general-sr20/18029-strange-constant-speed-issue-2.html#post237768

DC scotty outlines how to test your maf. This way you know for sure.

yeah i checked wiring and grounded the maf to the a metal part on the chassis. Ill go ahead and read what you posted and go from there.

here we go 99sel-r

mr-4door just pmed me this!!!! thanks dude

http://www.sr20-forum.com/tuning/17897-how-well-your-maf-performing.html

shouldnt the car have a rought idle when unplugging the maf sensor instead of the car shutting off?

I've had both circumstances man, depends on if it's a combination of things or not, but I've had both happen to the same car under the same conditions, so not all the time will it just 'idle rough'