why would you unplug a map sensor? - MustangForums.com


Go Back   MustangForums.com > Ford Mustang Tech > 5.0L (1979-1995) Mustang
Sign in using an external account
Register Forgot Password?
Search


5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

why would you unplug a map sensor?

Reply
 
 
 
 
Thread Tools Search this Thread
Old 06-18-2013, 06:44 PM   #1
duncan01
1st Gear Member
 
duncan01's Avatar
 
Join Date: Oct 2012
Vehicle: 88, ford, lx ssp
Location: TN
Posts: 61
Default why would you unplug a map sensor?

my car is an 88 lx originally a speed density car converted to mass. Just noticed that the map sensor is unplugged. It appears there it no place to plug it in on this aftermarket intake. I guess my question is do I need it and will it hurt anything. Side effects?

thanks
duncan
__________________
88 ssp 5.0 E-303 cam, GT40x307 heads, 1.6 roller rockers, hardened push rods, Professional products typhoon upper and lower, professional products throttle body, EGR delete, alluminum pulleys, bbk shorties, 24lb injectors, converted to mass air, 4.10 gear.
duncan01 is offline   Reply With Quote
Old 06-18-2013, 07:56 PM   #2
capri debris
3rd Gear Member
 
capri debris's Avatar
 
Join Date: Nov 2006
Vehicle: 1986 Mercury Capri
Location: PA
Posts: 816
Default

What exactly is unplugged... the vacuum hose or the electrical connector?

A speed density M.A.P. (manifold absolute pressure) sensor will have a vacuum hose connected to the intake, because speed density is dependent on manifold vacuum to tell the ECU how far the throttle is opened and uses a pre-set table of how much air is entering the engine and adds fuel accordingly.

Mass air cars use the same sensor, but without a hose connected which essentially converts the M.A.P. sensor into a barometric pressure sensor that gauges atmospheric pressure so the ECU knows what altitude the vehicle is operating at and how dense the air charge is. The ECU knows how much volume of air is entering the engine by the mass air sensor and uses the "MAP" sensor to tell it exactly how dense that air happens to be.

So in other words, if the electrical connector is connected and the car has been converted to mass air, you shouldn't have a vacuum hose connected to the sensor.
__________________
'86 Mercury Capri 5.0, 5 spd, mildly modded.
capri debris is offline   Reply With Quote
Old 06-18-2013, 07:57 PM   #3
Duncan_GT
4th Gear Member
 
Duncan_GT's Avatar
 
Join Date: Jun 2011
Vehicle: 95 GT
Location: Indy
Posts: 1,353
Default

I may be wrong, but if its been converted from SD to a MAF setup, then there is no need for the MAP. It does, however, use the same sensor from what I've seen.

Edit - Capri beat me before I could edit.
__________________
1995 Mustang GT
1999 F150 Lariat 4x4

Soon to come: 393 stroker
351w bored .030, Probe Industries forged internals, Trickflow 205's, FTI custom cam, Trickflow R 90mm intake, Accufab 90mm TB, FRPP 42lb injectors, 1 3/4" custom Accufab LT's, 3" exhaust, MS2

Last edited by Duncan_GT; 06-18-2013 at 08:00 PM.
Duncan_GT is offline   Reply With Quote
Old 06-18-2013, 08:15 PM   #4
duncan01
1st Gear Member
 
duncan01's Avatar
 
Join Date: Oct 2012
Vehicle: 88, ford, lx ssp
Location: TN
Posts: 61
Default

Sorry fellas, I was in the garage and had a thought and just turned around and started typing it before using the one rule we should all know. Google!!
Two seconds after I posted it I found the answer. Sorry you took the time to respond thanks for the quick reply.

Wont happen again.

Duncan
__________________
88 ssp 5.0 E-303 cam, GT40x307 heads, 1.6 roller rockers, hardened push rods, Professional products typhoon upper and lower, professional products throttle body, EGR delete, alluminum pulleys, bbk shorties, 24lb injectors, converted to mass air, 4.10 gear.
duncan01 is offline   Reply With Quote
Old 06-18-2013, 08:52 PM   #5
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Vehicle: 85 mustang
Location: West Virginia
Posts: 30,507
Default

map become a baro sensor and vaccum line is not connected to intake anymore/period
__________________

Quote:
Originally Posted by EUTARD View Post
Suggest having a conversation with the highly INEXPERIENCED clowns....D.R the Dork, THE BarnyYard smells like......again and finally staring the highly intelligent and I must say skilled Eutard! UH where did de' go George
mjr46 is offline   Reply With Quote

 
 
 
Reply

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
P0320 - Bucking when warm - HELP! bryan616fl 4.6L (1996-2004 Modular) Mustang 6 08-27-2015 09:27 AM
2002 Mustang GT Premium 5 Speed JonnyBlazeGT Mustangs For Sale 0 08-24-2015 05:21 PM
Front right ABS Sensor HillbillyLambo 5.0L (1979-1995) Mustang 3 08-21-2015 10:07 PM
californiaspec kevans79@yahoo.com General Tech 0 08-18-2015 08:16 AM
Need Help Diagnosing Have Codes (Confused) djbigskrilla 2005 - 2014 Mustangs 13 08-11-2015 12:59 PM

 
Advertising
Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 07:52 AM.>

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup