MAFS Mod - Ranger-Forums - The Ultimate Ford Ranger Resource

4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

LinkBack Thread Tools Search this Thread
Old 02-09-2007
Thread Starter
Join Date: Feb 2007
Location: Narragansett, RI
Posts: 21

Does anybody know of any cheap mafs mods. I am not sure if it is okay to do, but I was wondering if I could remove that huge piece of metal inside of the mafs housing and just have the mafs hang down in the tube open and not enclosed in that metal rectangular thing. I am not sure if this would offset the mafs’ reading and cause a problem or not, but I do know that if it would work I would be able to get a good amount of extra power for free. If this would not work would there be a way that I could replace the mafs’ housing with one from a mustang or something? Here is a link for what the mafs’ housing looks like on my truck.
Reply With Quote
Old 02-09-2007
n3elz's Avatar
RF Veteran
Join Date: Jun 2004
Location: Kennett Square, PA
Posts: 10,620
Check my cardomain page. I talk about it there. There's an index at the top.

Now, warning: on a 4.0 the MAF mod can put the curve so far off you will have problems, particularly at wide open throttle. I've been able to tune that out on some by feathering the leading edge of the sense tube -- but it's not guaranteed.

Now, if you have a SCT 9415 (newer Xcal2) or an older one with the Extreme Tune software, you can define a new MAF curve. Basically, you just correct the curve at idle, part throttle, and full throttle and the software draws a "perfect" curve through that.

The 3.0 engines usually have no problems with this -- but lots of 4.0's run lean after modifying the MAF.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
MAFS sharkboy1966 General Ford Ranger Discussion 1 08-05-2015 10:16 PM
MAFS, IAC or something else? diecast27 SOHC - 2.3L & 2.5L Lima Engines 0 05-30-2009 05:59 PM
mafs 02rangeroffroad 4.0L OHV & SOHC V6 Tech 15 09-14-2006 05:35 PM
Cleaning the MAFS JToona 2.9L & 3.0L V6 Tech 4 12-25-2005 07:48 PM

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 Off
Refbacks are Off

All times are GMT -6. The time now is 09:55 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.