surging idle

bmxandy89 · Post by **bmxandy89** » 07 Jun 2011, 12:52

ok so i real dont know what the heck i did but i cleaned the MAF with MAF cleaner and also cleaned the iac valve put it all back to gether now its surging like crazy anyone know what i did ?

bmxandy89 · Post by **bmxandy89** » 07 Jun 2011, 13:01

ok so just went out unplugged the MAF sensor and then started it and now its runnin fine but smells like eggs if i get on it

Post by **jblackburn** » 07 Jun 2011, 13:05

Don't gun it with the MAF unplugged; it is meant as a "limp mode" only and it's only guessing as to the amount of air that's entering the engine, and dumping in fuel to compensate. You'll burn up your catalytic converter.

Did you let the sensor dry before plugging it in? Touch the sensor at all with anything? Are you sure all hose connections are secure. Sounds like you might have killed the MAF sensor

bmxandy89 · Post by **bmxandy89** » 07 Jun 2011, 13:11

damn i should of left it alone i didnt touch it with anything but maybe by sprayin it made it dirtyier some how should i just buy a brand new one or go to the JY and grab one and if i buy a new one would going on ebay be a bad idea i saw some for like 70 bucks up there

Post by **jblackburn** » 07 Jun 2011, 13:13

Check hose clamps, etc first. It may be reading fine but confused due to an air leak at the idle control valve or something.

bmxandy89 · Post by **bmxandy89** » 07 Jun 2011, 13:19

lol i feel like an idiot i must of put it back in without lookin at it. i took the maf sensor back out and there was a bigg piece of dust on the element sprayed it one more time and put it back in its sittin dryin now i hate not having a garage . how long should i wait to try and start it i waited a half hour last time

Post by **jblackburn** » 07 Jun 2011, 13:31

Maybe an hour or so.

bmxandy89 · Post by **bmxandy89** » 07 Jun 2011, 13:45

does the MAF sensor start to go bad or go bad all at once and if its starting to go bad will it throw a code. i have never had a check engine light on. but last time i unplugged it and forgot to hook it back up a light came on and i had it reset they also said i had a bad o2 sensor... how come the o2 sensor never sets the light off ? do the check engine lights in these cars only come on when something completly fails and how do i reset the codes myself i dont wanna go to pep boys and wait a hour for them to do it

Post by **jblackburn** » 07 Jun 2011, 14:20

The CEL only comes on if a fault is detected in multiple instances.

In the case of a bad MAF sensor, it will not always trigger. Usually a bad one of those exhibits the symptoms just like you described, or your car just won't run at all.

MAF and O2 sensors rely on each other's readings to manage the air/fuel mixture into the engine.

Here is how to check and clear codes on your model:
http://www.volvospeed.com/CheckEngine.php

bmxandy89 · Post by **bmxandy89** » 08 Jun 2011, 15:52

yup so i completely killed the MAF sensor wheres a good place to buy one