Mass Air Flow Sensor Question??

Reply Subscribe

Thread Tools

Search this Thread

Nov 30, 2005 | 09:49 AM

Tahoe SS

Thread Starter

Teching In

Joined: May 2005

Posts: 6

Likes: 0

Mass Air Flow Sensor Question??

I have a 99 Tahoe (Old Body Style) with the 5.7 and the check engine light came on. I had it scanned and it was a MAF code. It has been missing a little but not sure if that is what it is or what. Runs good the you park some where for 5-10 mins and the leave and it cuts out. Anyone had any problems with their sensor and has it acted like that I was running a K&N air filter but took it off and put the factory one back on after the trouble started.

Nov 30, 2005 | 10:30 AM

Reject

TECH Senior Member

iTrader: (24)

Joined: Apr 2005

Posts: 9,195

Likes: 4

From: Texas

just a quick question, did you happen to recharge the K&N before all this started to happen?

Nov 30, 2005 | 02:36 PM

Tahoe SS

Thread Starter

Teching In

Joined: May 2005

Posts: 6

Likes: 0

Back in the summer,but just started not that long ago and it seems to be getting worse.

Dec 1, 2005 | 03:51 AM

CRAGER

Administrator

Joined: Nov 2001

Posts: 29,404

Likes: 0

From: Houston, TX

The oil from the K&N might be hitting the MAF and tripping the code.

Try to keep the paper one in there and reset your codes and see what happens.

Peace,
Craig.

Dec 1, 2005 | 04:52 AM

jkichline

TECH Regular

iTrader: (1)

Joined: Feb 2005

Posts: 416

Likes: 0

From: Bethlehem, PA

Have your tried to clean or replace the sensor?

Dec 1, 2005 | 07:59 AM

Reject

TECH Senior Member

iTrader: (24)

Joined: Apr 2005

Posts: 9,195

Likes: 4

From: Texas

you can usually clean the sensor with the areasol cans that you buy at a computer store to clean the contacts.

Dec 1, 2005 | 08:14 AM

LS1-450

TECH Junkie

iTrader: (33)

Joined: Aug 2005

Posts: 3,783

Likes: 9

All the above. It's likely that an over oiled K&N has coated the MAF with oil. Be very careful not to damage the tiny wires while cleaning the MAF. Once the oil is removed, re-set the codes & run on the paper filter to see what happens. It only takes a little oil (trace amount, a light dusting) for a K&N to filter properly. If all is ok after a week or so, clean the K&N filter, lightly cote it with oil & try it again.

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Dec 21, 2005 | 08:53 AM

Tahoe SS

Thread Starter

Teching In

Joined: May 2005

Posts: 6

Likes: 0

I think that was the problem. I took it apart last night and it did have a film of oil on it and it was covered in dirt and dust. Cleaned it with Q-tips and it seems to run fine now better than it has in a long while. Thanks guys.