MAF for a 4.2?? - Defender Source
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  #1  
Old April 16th, 2013, 11:50 AM
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MAF for a 4.2??

Thought I would take a chance and see if anyone has a good working MAF...

For my Rangie Classic
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  #2  
Old April 16th, 2013, 12:02 PM
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Check on Buckhorn Imports ebay site, if you cant find one...
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  #3  
Old April 16th, 2013, 01:46 PM
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You might give Wally a call too over at Loudoun Rover.
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  #4  
Old April 16th, 2013, 01:59 PM
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wow..these damn things are expensive!
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  #5  
Old April 16th, 2013, 02:12 PM
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Try Roverdude, I just got one from him for my 3.9
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  #6  
Old April 16th, 2013, 02:20 PM
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How much are they?
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  #7  
Old April 16th, 2013, 02:37 PM
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Atlantic British - $349 - remanuf
Rovers North - not in stock, can get them though, about the same $

Local guy Loudoun Rover - $250 used - apparently good
eBay - there are some at $90 onwards...just not too sure about quality?????
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  #8  
Old April 16th, 2013, 02:45 PM
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Can you wait until thursday?
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  #9  
Old April 16th, 2013, 02:46 PM
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OK...F' it - I found one on fleabay for $39 shipped....I will see if that is my problem. Hoping that it is a good one though!!

------ Follow up post added April 16th, 2013 02:46 PM ------

Thanks Bill - I can wait - but I wont be at HH. I just nabbed one off ebay - I hope that works
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  #10  
Old April 16th, 2013, 03:16 PM
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Will a 3.9 MAF not work for the 4.2?
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  #11  
Old April 16th, 2013, 05:02 PM
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dunno Jeff.

I don't even know 100% if the MAF is the problem...remember your issue last year....stumbling, stalling and rough running/idle? Well I got the disease now!!!

Pulling my hair out - swapped out all the sparkplug leads, cleaned the stepper, new fuel filter, the dizzy is relatively new (so assume it is fine) and now I checked the OBD and I am getting Code 12...which is air flow related. I checked the MAF using a voltage meter and it shows that their is an issue with the MAF. So next is to swap that out and see if that is the problem.

I just want a nice smooth running 4.6!!!!!!
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  #12  
Old April 16th, 2013, 05:48 PM
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Craig look for a vacuum leak (check all the hoses on the plenum), followed by the ignition module, followed by coil, followed by alternator. Those are the first an most likely culprits. MAF usually doesn't go bad unless you dunk it.
Oh and maybe you have the plug wires on wrong. If you mix up the 5 and 6 which is easy to do, then, well...
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  #13  
Old April 16th, 2013, 05:54 PM
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Thanks Bill...will have a look at the vacuum lines...I have double checked plug wires (my first thought).
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  #14  
Old April 17th, 2013, 11:51 AM
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I have one, its not on eBay though. I try to keep one on the side for situations like this.
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  #15  
Old April 17th, 2013, 01:35 PM
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OK - question for you guys...

If I start the truck and while it is running I disconnect the MAF, it should still run right?

Mine stalls out...
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  #16  
Old April 17th, 2013, 01:43 PM
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it will run rough and or stall out...it varies. in my experience it ran rough then stalled out. I guess it matters how bad the sensor (wires are) is. You could always buy on and try it out. What year is the vehicle?
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Old April 17th, 2013, 01:47 PM
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Hey Bill .. it is a 95 4.2 top end - 4.6 short block. I bought another MAF on eBay and will fit that and see. I currently have Code 12 ont he reader - consensus is that is an air flow metering issue.

So far I have changed with new parts - Alternator, Vacuum lines, plug wires with magnecor 8mm, and the dizzy is the blue one from AB (about a year old) not a lot of miles on it.
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  #18  
Old April 17th, 2013, 01:55 PM
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Quote:
Originally Posted by 1971Series88 View Post
Hey Bill .. it is a 95 4.2 top end - 4.6 short block. I bought another MAF on eBay and will fit that and see. I currently have Code 12 ont he reader - consensus is that is an air flow metering issue.

So far I have changed with new parts - Alternator, Vacuum lines, plug wires with magnecor 8mm, and the dizzy is the blue one from AB (about a year old) not a lot of miles on it.
I'm sure someone will correct me if I'm wrong but I'm 99% certain it doesn't matter whether its 4.0, 4.2, or a 4.6. The MAF should be the same. I try to keep a few extras around just for the heck of it. The good news is a few of the Disco's and RRC's used the same parts as the D90...I know on my 97 that's true so keep that in the old memory banks...
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  #19  
Old May 3rd, 2013, 10:09 AM
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Craig- did you every have final resolution on this?
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