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Discussion Starter #1 (Edited)
70mm MAF on a 3.8...will it work?***UPDATE***

I have a 1991 cougar 3.8L n/a. A fellow tbird owner mentioned the possibility of the 4.6L MAF working on my car. i am not sure if i have 19lb injectors or not. can someone shed some light on this. Thanks:thumbsup:
 

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Moderator, Iowa Chapter Director, Uber Luber, TCCo
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my 93 has a 70mm maf on it. The thing you need to do is only use the MAF Housing but use your stock sensor from your 91. You'll have a heck of a time getting out those tamper proof bolts, but you can find a bit online or at an auto parts store.
-Thomas
 

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Discussion Starter #3
That is music to my ears *:ztoohot:speeds to junk yard:ztoohot:*
So the size of the injectors is "not" an issue then?
 

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not as long as you use your factory sensor and just swap over the housings.
-Thomas
 

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The Parts Guy
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By the way, stock injectors for a 3.8L N/A are 14lb. Thomas is completely correct, just swap the housing over and enjoy a little more air.


-Rod
 

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Discussion Starter #6
Thanks again guys. i'll get some pics of the results!
 

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Confirmed V6 Nut
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I have a question here.

If I took a 80 mm MAF housing from a 4.6L and used my sensor from my 70 mm MAF, would that work?

If I took an 80 mm MAF and sensor from a 4.6L and installed both. Would that work on my 3.8?

I'm looking for the why and why not, and how to get around the why not.
 

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the sensors are totally different, the sensor will not fit in the 80mm housing. So you would need to get the wiring harness for that MAF and get a chip to reprogram the MAF sensor to work correctly.
-Thomas
 

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Discussion Starter #9
I was just toying around het idea of using a mm MAF. A problem a friend mentioned, was that a stock 3.8L may lean out some. 70mm should do fine though. I am going looking this weekend:ztoohot:
 

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Umm accually I ran with a 98 Cobra 80MM MAF for almost a year just swapped the electronic bits(carefully-good time to clean it too). I had to grind the corners on the MAF-to make it a circle as it had that stupid square arrangement on it-down with a dremel tool(be careful or you'll crack it) and take out the rubber adapter thing that the stock MAF mounts in replace that with some high temp hose from a Semi repair shop( free if you get scraps that they can't use).
PCD if you need pics I'll pop them over to ya.
Autozone sells the tamper proof bit tools in a set or if you get a C&L MAF you get one free.
Just one thing to remember going from 14# injectors to 19#'s on a calibration will lean you out a little bit but not so much as you'd ever notice if you were to go to say an 80M from a cobra you'll need 36# injectors from the same car(keep in mind they swapped connector styles in Mid 99) yes ford MAFS are calibrated in a similar way that C&L mafs are the sampling post in themiddle has a block off plate screwed into the back that is what sets the calibration on the meter.
 

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Cougar Pilot
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Well sir, I read that post long and hard, and it made very little sense. Sorry. :confused:

All I know is my factory 3.8L electronic portion of the MAF will not fit on my 80mm L-MAF housing.
 

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Zippythesquirrel said:

Just one thing to remember going from 14# injectors to 19#'s on a calibration will lean you out a little bit but not so much as you'd ever notice if you were to go to say an 80M from a cobra you'll need 36# injectors from the same car(keep in mind they swapped connector styles in Mid 99) yes ford MAFS are calibrated in a similar way that C&L mafs are the sampling post in themiddle has a block off plate screwed into the back that is what sets the calibration on the meter.
Sorry but this is totaly un true Factory Ford MAF are not calibrated to injector size! The puter is what maps the injectors. Mass air flow meters that are "calibrated to injector size" Just fool the computer into thinkink it is getting less air
 

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Discussion Starter #14
5.0 chero:
If I were to go from 14 lb injectors to 19 lb. injectors, I'd be running rich not lean. Also, I found (what I believe) to be a MAF from a 4.6L. Only problem is that is was on a 94 XR7 3.8L! I found this to be odd, to say the least. After comparing the MAf to that a a V8 towncar, I concluded it to be the same in design. It is on my car, and there is a difference in throttle response. Nothing to write home about, but a little something to add-on. Thanks for the info. I'll have to see whatelse that XR7 has that I want. Could be a factory freak, or maybe some was buidling something when it went bad. Junk yard 101
 

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All 94-97 4.6's, 94-97 3.8's, and 91-95 sc's had the 70mm MAF housing. It's not from a 4.6 it's from a 94 xr7 3.8. It was factory. I hope you swapped sensors first.
-Thomas
 

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Discussion Starter #16
I did not swap the sensors. What difference would it make though> It runs good, and the motors are the same:2huh: What am I missing here...
 

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the sensors have different transfer functions programmed. as long as the part number on the sensor matches up you can use it.
-Thomas
 

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Discussion Starter #18
They are different. What problems can this cause? I tell you, my car runs much better know. Not to mention it came off a 3.8L. Other than slight electronic variations between years (if any), what "possible" issues can arise? Just trying to get an idea of what gremelins I'm fooling with. Thanks.
 

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Because the sensors are different. They are programmed with different functions. Just use your stock one. When I put on my 70mm MAF from a 94 3.8 I wondered what it'd do if I left the 94 sensor on there. My air/fuel gauge showed I was in open loop constantly. That is not good. I couldn't feel a difference but I saw it on the air/fuel gauge. So use your stock sensor.
-Thomas
 

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Discussion Starter #20
I'll look into getting those goofy MAF screws off. That is the main reason I have not changed them over. Gas milage and all seems a bit better than normal. We'll see how this tank of gas goes. I do see what you are saying though. I'll play it by ear. and change when possible.
 
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