94 MAF/MAP scanner readings
Thread Starter
|
Mountain Pass
Joined: Nov 2005
Posts: 116
Likes: 0
94 MAF/MAP scanner readings
94 f-150 5.0 with MAF. Bought an Actron scanner and in the data list it is showing a MAF reading and a MAP which is stuck at 8.1 inHg. Is this non functioning MAP reading a problem, or should I just ignore? Currently hunting surging idle when warm (suspect ECM capacitors). Thanks
Thread Starter
|
Mountain Pass
Joined: Nov 2005
Posts: 116
Likes: 0
the MAF reading is changing, MAP is at 8.1 running or not. I don’t think there is an issue with the MAF reading, mostly just curious why there is a MAP reading.
Lead Driver
Joined: May 2011
Posts: 5,775
Likes: 443
I am pulling this out of archives of my decreasing memory on the topic, but I thought MAF trucks still had a MAP sensor
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
Early MAF Mustangs had a MAF sensor and a BARO sensor. MAF trucks only had the MAF sensor.
A BARO sensor is a MAP sensor referenced to atmosphere not manifold vacuum.
Those folks using the A9* PCMs on a truck kept the MAP sensor, but removed the connection to the manifold. So now it became a BARO sensor. Again, factory MAF trucks do not have a MAP/BARO sensor.
A BARO sensor is a MAP sensor referenced to atmosphere not manifold vacuum.
Those folks using the A9* PCMs on a truck kept the MAP sensor, but removed the connection to the manifold. So now it became a BARO sensor. Again, factory MAF trucks do not have a MAP/BARO sensor.
Lead Driver
Joined: May 2011
Posts: 5,775
Likes: 443
Early MAF Mustangs had a MAF sensor and a BARO sensor. MAF trucks only had the MAF sensor.
A BARO sensor is a MAP sensor referenced to atmosphere not manifold vacuum.
Those folks using the A9* PCMs on a truck kept the MAP sensor, but removed the connection to the manifold. So now it became a BARO sensor. Again, factory MAF trucks do not have a MAP/BARO sensor.
A BARO sensor is a MAP sensor referenced to atmosphere not manifold vacuum.
Those folks using the A9* PCMs on a truck kept the MAP sensor, but removed the connection to the manifold. So now it became a BARO sensor. Again, factory MAF trucks do not have a MAP/BARO sensor.
Trending Topics
Lead Driver
Joined: Jun 2021
Posts: 5,219
Likes: 805
Factory MAF calculates the manifold pressure at high throttle situations and, in my experience, periodically (NOT often) otherwise
Since it knows the air flow, the reading is unlikely to change enough ambiently to affect fueling that much I think is the reasoning for it being so casual. like you arent going from 0ft above sea level to 6000 between the time it takes to get an update from it lol,.
Since it knows the air flow, the reading is unlikely to change enough ambiently to affect fueling that much I think is the reasoning for it being so casual. like you arent going from 0ft above sea level to 6000 between the time it takes to get an update from it lol,.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Thread Starter
|
Mountain Pass
Joined: Nov 2005
Posts: 116
Likes: 0
Thanks, so on my truck it is not relevant. I think the discussion above is on a particular year(s) of mustang, correct. I hope it did not calculate my reading of 8.1 inHg as that is about 3.9psi which would be nuts.
Thread
Thread Starter
Forum
Replies
Last Post
palace55
1987 - 1996 F150 & Larger F-Series Trucks
27
May 9, 2022 02:18 PM
Galizien
1987 - 1996 F150 & Larger F-Series Trucks
4
Dec 29, 2006 09:37 AM