1991 F150 Maf Location Please - F150online Forums

Go Back  F150online Forums > Powertrain & Mechanical > V8 Engines
1991 F150 Maf Location Please > 1991 F150 Maf Location Please

1991 F150 Maf Location Please


Old 12-09-2004, 07:10 PM
Junior Member
Thread Starter
Join Date: Dec 2004
Posts: 1
1991 F150 Maf Location Please

I have a 1991 F150 with a 5.8
Can someone tell me where the MAF sensor is located?
Reply With Quote
Old 12-09-2004, 07:42 PM
Senior Member
Join Date: May 2004
Posts: 544
you don't have a mass air flow sensor,you have a manifold absolute pressure sensor in the intake.i'm not sure on it though.if you do have an maf it'll be on the plastic intake tubes close to the airbox.
Reply With Quote
Old 12-10-2004, 12:08 AM
Senior Member
Join Date: Dec 2002
Location: Windsor, ON
Posts: 295

Whitey Is right. There is no Mass Air flow sensor in these trucks. There's a MAP (Manifold Absoloute Pressure) Oxygen, And even An IAC (Idle Air Contol motor) But not Mass air flow. If you're having a problem with the way it's running, post your symptoms and we'll do our best

Reply With Quote
Old 12-11-2004, 05:50 PM
Junior Member
Join Date: Jun 2004
Posts: 6
I have a 93 F-150 w/5.8 and the Manifold Absolute Pressure (MAP) sensor is located on the left rear portion of the engine firewall. It has a few vacuum lines coming out from it.
Reply With Quote
Old 12-12-2004, 04:55 PM
Join Date: Oct 2004
Location: Iowa
Posts: 43
Yes, these trucks use a Speed Density system, which uses the MAP sensor. It reads vacuum from the intake manifold.

Like already mentioned, it's located on the firewall on the passenger side and looks like this. Mine is mounted with the connector and vacuum line pointing towards the front of the truck.

Reply With Quote

Related Topics
Thread Starter
Last Post
1997 - 2003 F-150
09-23-2017 08:42 AM
Introduction Forum
11-06-2015 11:59 PM
pa 150
2004 - 2008 F-150
07-19-2015 07:57 PM
1997 - 2003 F-150
07-19-2015 12:58 PM
Introduction Forum
07-14-2015 07:17 PM

Thread Tools
Search this Thread
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 -4. The time now is 06:40 AM.

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 Amazon.com and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: