Maf
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Laughing Gas
Joined: Nov 2003
Posts: 794
Likes: 3
Maf
Ok I know I have read somewhere on these forums how to clean the Maf, but I searched and searched and haven't found it. Any chance someone can give me the procedure or perhaps link me to where it already is?
BTW I want to clean it b/c my light came on and autozone said "Lean Conditions" My first thought was the MAF is dirty. Also a pic would be great showing which sensor the MAF is. My Hanes book doesn't have any pictures of the MAF.
Also if ya'll know of something else that I may need to try to fix this code that would also be appreciated.
Thanks
1997 4x4 4.6 205k miles
BTW I want to clean it b/c my light came on and autozone said "Lean Conditions" My first thought was the MAF is dirty. Also a pic would be great showing which sensor the MAF is. My Hanes book doesn't have any pictures of the MAF.
Also if ya'll know of something else that I may need to try to fix this code that would also be appreciated.
Thanks
1997 4x4 4.6 205k miles
Laughing Gas
Joined: Oct 2003
Posts: 967
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From: DC
Vacuum leak is a common cause of a lean condition. Check the hose from the PCV especially near the elbow. By the way, choke cleaner will work for the MAF, but I think electrical contact cleaner is prefered.
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Laughing Gas
Joined: Nov 2003
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Proven to gain 4-10 hp at the wheels huh??? I think I'll spray that straight in the gas tank then it'll prolly give me 20hp!!!!!!!!
Well I already sprayed that one with Lectron 13 I was thinkin the MAF might be the second sensor on the tube.
Vaccum leak huh? Ummm I am not sure what it is called, but it comes out of the middle of the valve cover on the drivers side and goes into the throttle body area. The hose that goes over it just barely hangs on I have been meanin to reinforce it with a hose clamp but haven't gotten around to it. 2moro I will check to see if that hose is off.
Well I already sprayed that one with Lectron 13 I was thinkin the MAF might be the second sensor on the tube.
Vaccum leak huh? Ummm I am not sure what it is called, but it comes out of the middle of the valve cover on the drivers side and goes into the throttle body area. The hose that goes over it just barely hangs on I have been meanin to reinforce it with a hose clamp but haven't gotten around to it. 2moro I will check to see if that hose is off.
Posting Guru
Joined: Oct 2005
Posts: 2,209
Likes: 1
From: Louisville, Kentucky
Originally Posted by zman764
Proven to gain 4-10 hp at the wheels huh??? I think I'll spray that straight in the gas tank then it'll prolly give me 20hp!!!!!!!!
Well I already sprayed that one with Lectron 13 I was thinkin the MAF might be the second sensor on the tube.
Vaccum leak huh? Ummm I am not sure what it is called, but it comes out of the middle of the valve cover on the drivers side and goes into the throttle body area. The hose that goes over it just barely hangs on I have been meanin to reinforce it with a hose clamp but haven't gotten around to it. 2moro I will check to see if that hose is off.
Well I already sprayed that one with Lectron 13 I was thinkin the MAF might be the second sensor on the tube.
Vaccum leak huh? Ummm I am not sure what it is called, but it comes out of the middle of the valve cover on the drivers side and goes into the throttle body area. The hose that goes over it just barely hangs on I have been meanin to reinforce it with a hose clamp but haven't gotten around to it. 2moro I will check to see if that hose is off.
BTW, what codes did you get when the CES came on? My guess (key word here, guess) is P0171 and P0174. At this point, guessing at what is causing your problem, besides picking up on tidbits that you mention, is all that anyone can do. The DTC's are very important for help here on FTE.
Fixing the vacuum leak at the rear of the intake manifold from the PCV valve is a must. This may even fix your entire problem. Good luck!
Elder User
Joined: Jan 2006
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Originally Posted by zman764
Proven to gain 4-10 hp at the wheels huh??? I think I'll spray that straight in the gas tank then it'll prolly give me 20hp!!!!!!!!
I just noticed that the can says that. Too funny.
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Laughing Gas
Joined: Nov 2003
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When I sprayed the Lectron 13 onto the filaments I did it with the MAF still in the intake. It never seemed to make a difference. I looked at just about all of the emmission hoses today and I didn't see any hoses that were loose or anything.
Is it possible that maybe it was a one time thing and its still just displaying the code? I will disconnect the battery and let it set tomorrow to see if the light comes back on.
I do not remember a code that the zdvanced auto parts guy said. I just remember lean conditions.
Thank ya'll
Is it possible that maybe it was a one time thing and its still just displaying the code? I will disconnect the battery and let it set tomorrow to see if the light comes back on.
I do not remember a code that the zdvanced auto parts guy said. I just remember lean conditions.
Thank ya'll
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Post Fiend
Joined: Jun 2005
Posts: 7,047
Likes: 2
From: North west La
Did you chech your pvc line. Its known to leak at the elbow where it goes into the intake at the back of the motor. I've put 2 on my truck since I bought it. Its a common cause of the lean code you have.
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Laughing Gas
Joined: Nov 2003
Posts: 794
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Real Code
Ok I had the codes rescanned today as I was buyin some oil & a filter.
I'm pretty sure it was P0171 and it said lean conditions Bank 1.
I was watchin what the screen said because it was obviously a new guy and I wanted to make sure what was goin on, the device said there were 2 codes stored and he played with it and played with it and all it ever said was the 1 code. But another guy at the Advanced store said thats most likely one of the oxygen sensors on the exhaust.
My questions are how do I figure out which one it is? And other than replacing the sensor and seeing if the light comes back on or not, how do I test to see if the engine is really running too lean?
Thanks
I'm pretty sure it was P0171 and it said lean conditions Bank 1.
I was watchin what the screen said because it was obviously a new guy and I wanted to make sure what was goin on, the device said there were 2 codes stored and he played with it and played with it and all it ever said was the 1 code. But another guy at the Advanced store said thats most likely one of the oxygen sensors on the exhaust.
My questions are how do I figure out which one it is? And other than replacing the sensor and seeing if the light comes back on or not, how do I test to see if the engine is really running too lean?
Thanks
Posting Guru
Joined: Oct 2005
Posts: 2,209
Likes: 1
From: Louisville, Kentucky
P0171 is system too lean on bank 1.
- Check intake air system for leaks, obstructions and damage.
- Check air cleaner element, air cleaner housing for blockage.
- Verify integrity of the PCV system.
- Check fuel delivery system and filter for restriction.
- Check for vacuum leaks.
Laughing Gas
Joined: Oct 2003
Posts: 967
Likes: 0
From: DC
The PCV valve is in the passenger side valve cover (about in the center) take a good look at the hose that comes out of it and follow it all the way around to the back of the manifold. Make sure there are no holes or breaks in it. Probably have to check most of it by feel (or mirror).