Bad MAF? - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 08-22-2011, 03:22 PM   #1
Registered Member
Regular
 
MustangGT02's Avatar
 
Join Date: Jun 2011
Location: MO
Region: Missouri
Posts: 437
Bad MAF?

When I installed my AM cold air intake my car started to have a miss or a pop noise. I was wondering if i can get any info on this subject or even find out a way to test if its my MAF going bad.
MustangGT02 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-22-2011, 03:31 PM   #2
Registered Member
Regular
 
Jamesgt08's Avatar
 
Join Date: Jan 2011
Region: Texas
Posts: 1,361
Have you tried cleaning your sensor?
Jamesgt08 is offline   Reply With Quote
Old 08-22-2011, 03:32 PM   #3
Registered Member
Regular
 
MustangGT02's Avatar
 
Join Date: Jun 2011
Location: MO
Region: Missouri
Posts: 437
Re: Bad MAF?

How do you do that?
MustangGT02 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-22-2011, 03:35 PM   #4
Registered Member
Regular
 
Jamesgt08's Avatar
 
Join Date: Jan 2011
Region: Texas
Posts: 1,361
They have MAF sensor cleaner at autozone or ur local parts store. You can get a spray can of the cleaner for cheap and pull the sensor out and make sure u dont touch it and lightly spray it. And let it dry.
Jamesgt08 is offline   Reply With Quote
Old 08-22-2011, 03:40 PM   #5
Registered Member
Regular
 
MustangGT02's Avatar
 
Join Date: Jun 2011
Location: MO
Region: Missouri
Posts: 437
Re: Bad MAF?

Cool thanks for the help I will have to give it a shot some time.
MustangGT02 is offline   Reply With Quote
Old 08-22-2011, 06:11 PM   #6
Road Trip!
 
Join Date: Jun 2010
Region: Pennsylvania
Posts: 136
Re: Bad MAF?

Was it running properly before? Then it may be the intake. The ECU uses the MAF to properly determine the grams per second of air entering the engine. When you change the shape and geometry of the MAF HOUSING then you WILL have an effect on how the computer fuels the motor. The maf was calibrated to the original housing. Now you've changed it and now it can't sample the air accurately

Try changing it back and see what happens.
ajpturbo is offline   Reply With Quote
Old 08-22-2011, 07:11 PM   #7
Registered Member
Regular
 
MustangGT02's Avatar
 
Join Date: Jun 2011
Location: MO
Region: Missouri
Posts: 437
Re: Bad MAF?

Yes it ran fine before. How can you change the ECU to accept the more air? and what do you mean by MAF housing?

Why would the be doing this to just me, i would think that others would have complained.
MustangGT02 is offline   Reply With Quote
Old 08-22-2011, 07:18 PM   #8
Registered Member
Regular
 
blackhawk 1's Avatar
 
Join Date: Aug 2011
Region: California
Posts: 472
Re: Bad MAF?

Hope u get it solved , bro , let us know .
blackhawk 1 is offline   Reply With Quote
Old 08-22-2011, 07:46 PM   #9
Registered Member
Regular
 
Jamesgt08's Avatar
 
Join Date: Jan 2011
Region: Texas
Posts: 1,361
Most ppl get it tuned. Or maybe if u disconnect the negative side of ur battery for like 30 mins and hook it back up and see what happenss.
Jamesgt08 is offline   Reply With Quote
Old 08-22-2011, 07:48 PM   #10
Registered Member
Regular
 
MustangGT02's Avatar
 
Join Date: Jun 2011
Location: MO
Region: Missouri
Posts: 437
Re: Bad MAF?

Ok need more help. My dad and I went out to see if everything was sealed on my cai and noticed the PCV pipe was sucked closed not pulling air throught it. I think I need a PCV valvue so it will breath right. Am I on to some thing here??
MustangGT02 is offline   Reply With Quote
Old 08-22-2011, 07:50 PM   #11
Registered Member
Regular
 
Jamesgt08's Avatar
 
Join Date: Jan 2011
Region: Texas
Posts: 1,361
Are u talkin about the one goin to ur plenum?
Jamesgt08 is offline   Reply With Quote
Old 08-22-2011, 07:51 PM   #12
Road Trip!
 
Join Date: Jun 2010
Region: Pennsylvania
Posts: 136
Re: Bad MAF?

Quote:
Originally Posted by MustangGT02 View Post
Yes it ran fine before. How can you change the ECU to accept the more air? and what do you mean by MAF housing?

It's called tuning. You need software and a tuning device. No simple solution

Why would the be doing this to just me, i would think that others would have complained.
Can't tell you that?

And, you may or may not really be getting more air at all. That's not the problem. It's how the Maf is sampling the air. It thinks there is a certain amount of air coming in based on what the maf is reading when in fact there may be a different amount of air coming in. It is fueling based on what it thinks is coming in and not what is actually coming in and probably throwing things off.. When you change the maf housing you may be creating turbulent air and eddys around the maf making the ECU fuel the car improperly.
ajpturbo is offline   Reply With Quote
Old 08-22-2011, 07:52 PM   #13
Registered Member
Regular
 
MustangGT02's Avatar
 
Join Date: Jun 2011
Location: MO
Region: Missouri
Posts: 437
Re: Bad MAF?

it goes from the valuve covers to the throtle body i think.
MustangGT02 is offline   Reply With Quote
Old 08-22-2011, 07:54 PM   #14
Registered Member
Regular
 
Jamesgt08's Avatar
 
Join Date: Jan 2011
Region: Texas
Posts: 1,361
Its just a vacuum hose. I had the same problem before i went to the ford dealer and bought a new one for like 20 bucks. But i dont think thats ur problem.

---------- Post added at 07:54 PM ---------- Previous post was at 07:52 PM ----------

Your having a problem cuz u got more air and the MAF isnt reading correctly. Dissconect the battery and hook it back up after a while and see what happens. Let us kno.
Jamesgt08 is offline   Reply With Quote
Old 08-22-2011, 07:54 PM   #15
Road Trip!
 
Join Date: Jun 2010
Region: Pennsylvania
Posts: 136
Re: Bad MAF?

On modern cars that are fueled by the maf sensor intakes are really important. Most people think you can just swap intakes and it's no big deal. Stick with the high end intakes as they are tuned to keep a/f ratios OK.

Now if your car determines fueling based on a speed density setup or MAP sensor then changing the intake will have no effect
ajpturbo is offline   Reply With Quote
Old 08-22-2011, 07:55 PM   #16
Registered Member
Regular
 
MustangGT02's Avatar
 
Join Date: Jun 2011
Location: MO
Region: Missouri
Posts: 437
Re: Bad MAF?

Yah I know it a vaccum hose but it could be affecting my idle.




I have unpluged the battey for hours, I changes the spark plugs not to long ago and it made no difference.
MustangGT02 is offline   Reply With Quote
Old 08-22-2011, 08:04 PM   #17
Road Trip!
 
Join Date: Jun 2010
Region: Pennsylvania
Posts: 136
Re: Bad MAF?

Quote:
Originally Posted by Jamesgt08 View Post
Most ppl get it tuned. Or maybe if u disconnect the negative side of ur battery for like 30 mins and hook it back up and see what happenss.
Don't worry about trying this. This will reset a CEL but not recalibrate a MAF.
If you understood tuning and how a MAF works you would understand. This is usually just a last resort thing for people that messed with their car in a way they shouldn't have

---------- Post added at 09:04 PM ---------- Previous post was at 09:01 PM ----------

CobbTuning.com - Aftermarket Intakes

Read this. It is still applicable to our cars because the fueling is determined by the MAF
ajpturbo is offline   Reply With Quote
Old 08-22-2011, 08:18 PM   #18
Registered Member
Regular
 
MustangGT02's Avatar
 
Join Date: Jun 2011
Location: MO
Region: Missouri
Posts: 437
Re: Bad MAF?

Its the stock MAF i have not changed any thing but the tubes going to it ok!
MustangGT02 is offline   Reply With Quote
Old 08-22-2011, 08:21 PM   #19
Road Trip!
 
Join Date: Jun 2010
Region: Pennsylvania
Posts: 136
Re: Bad MAF?

Quote:
Originally Posted by MustangGT02 View Post
Its the stock MAF i have not changed any thing but the tubes going to it ok!
Yes well that can do it.

Do you by chance have a CEL?
ajpturbo is offline   Reply With Quote
Old 08-22-2011, 08:32 PM   #20
Registered Member
Regular
 
MustangGT02's Avatar
 
Join Date: Jun 2011
Location: MO
Region: Missouri
Posts: 437
Re: Bad MAF?

Ohh a engine light, no

---------- Post added at 01:32 AM ---------- Previous post was at 01:26 AM ----------

Ok here is what Im going to do, this weekend Im goingt to buy a new pvc valve and put a new hose on it. Then I will also clean the MAF with the spray stuff. I will post if this works.
MustangGT02 is offline   Reply With Quote
Old 08-27-2011, 03:25 PM   #21
Registered Member
Regular
 
MustangGT02's Avatar
 
Join Date: Jun 2011
Location: MO
Region: Missouri
Posts: 437
Re: Bad MAF?

UPDATE, I got the pvc valve replaced (i dont think it was bad) I also put new hose on, the old one was so wet with liquid it would just colapse on its self when it was runing allowing no airflow. This did not solve my problem but the car does run noticblie better. Tomarrow I will do the MAF cleaner and I also got some Injector cleaner which pry wont do any thing but its worth the try.
MustangGT02 is offline   Reply With Quote
Old 08-28-2011, 07:11 AM   #22
Registered User
Newbie
 
Join Date: Aug 2011
Region: Texas
Posts: 2
I'm going to look at a 2000 mustang gt today but the guy says the engine light is on and the dealership said it's the cold air intake can this really happen?
2000austingt is offline   Reply With Quote
Old 08-28-2011, 09:53 AM   #23
Registered Member
Regular
 
MustangGT02's Avatar
 
Join Date: Jun 2011
Location: MO
Region: Missouri
Posts: 437
Re: Bad MAF?

Well I just used the MAF cleaner and no luck so now its to plan B which is get to the spark plug that has a COP with a stripped bolt, then Im going to change the fuel filter.
MustangGT02 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
96 SVT Cobra appears Superchip is bad opinions on my options please Spiney SVT Mustang 15 11-07-2011 08:34 AM
How bad did i screw up? Boes462 1979-1995 Mustang GT 7 08-11-2011 12:01 AM
Bad luck... Blackedout Pre-2005 V6 Mustang 20 07-29-2011 08:50 AM
MAF t0t4lbl4ck0ut 1996-2004 Mustang GT 4 07-20-2011 01:53 PM
MAF sensor Mustanglife Pre-2005 V6 Mustang 5 07-01-2011 08:22 AM

» Like Us On Facebook



07:07 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.