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change from a maf to a map sensor

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Old 03-18-2010, 06:34 AM
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change from a maf to a map sensor

i got a 95 f150 4x4 5.0 with maf and the motor blew so i can get another ford f150 5.0 motor from a 93 or 94 truck but its got no maf its got a map so what do i need to change from maf to map sensor. any help would be appreciated thanks..
 
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Old 03-18-2010, 06:37 AM
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the engine dosn't know what it is. the sensors are not on the engine. maf is the better system i would stick with that
 
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Old 03-18-2010, 06:41 AM
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so how would i still use the maf if the motor im putting in got a map sensor what would need to be changed thanks..
 
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Old 03-18-2010, 06:46 AM
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NONE OF THE SENSORS ARE ON THE ENGINE. THE MAF METER IS IN THE INTAKE TUBE REUSE IT AND YOU HAVE MAF.
 
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Old 03-18-2010, 06:50 AM
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so all i got to do is change the intake tube... so do i have to use the 95 motor harness on the 93 or 94 motor or are the harness the same.. thanks for your time too.
 
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Old 03-18-2010, 06:53 AM
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i double posted.
 

Last edited by palace55; 03-18-2010 at 06:54 AM. Reason: double posting..
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Old 03-18-2010, 06:54 AM
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yes i would use the harness from the 95.
 
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Old 03-18-2010, 06:55 AM
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ok thanks...
 
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Old 03-20-2010, 01:07 PM
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the motor is from a 93 so do i really have to change the motor harness or can i use the 93 motor harness and just plug it into my main harness and just leave the map sensor unplugged so i can use my maf hoses. or do i have to use the 95 engine harness... any help in making this easier would be helpful thanks.
 
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Old 03-20-2010, 01:34 PM
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Originally Posted by palace55
the motor is from a 93 so do i really have to change the motor harness or can i use the 93 motor harness and just plug it into my main harness and just leave the map sensor unplugged so i can use my maf hoses. or do i have to use the 95 engine harness... any help in making this easier would be helpful thanks.
Yes use the 93 harness if you want, the 93 and 95 use the same harness.

You're not going to get the map sensor it is mounted on the firewall so quit worrying about that, it is a non issue in your case.
 
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Old 03-20-2010, 03:22 PM
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but on my 95 harness seems the wire are different color and few in a different place than the 93 harness and a few vaccum hoses are different... thanks for your help...
 
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Old 03-20-2010, 04:07 PM
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Yea there is going to be some differences.

For example do you intend to continue to run the egr valve/system? 95 MAF, is that a DPFE type? If so then yea you'll need that part of the 95 harness for that sensor wiring.

To simplify things it sounds like you'll be better off changing to the 95 harness before you drop it in.
Somethings will be different but nothing not easily worked out between the two.

As far as vacuum, hook back up what it needs, everything that was connected before. Then just plug/cap any unneeded ports if you end up with any.

Take notes, take digital snap shots of everything before you disconnect so if your not sure and or can't remember where everything goes.
Tag everything with masking tape, write what it connected to right on the tape.
 
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Old 03-20-2010, 04:17 PM
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You're getting bad advice here don't change any of the wiring on your truck, simply disconnect everything at the engine sensors when you remove the existing motor and plug them back into the donor motor once it is installed.

However.. if you use a pre '94 5.0 you will have to change the cam because the firing order changed in '94. This matters because your truck uses sequential injection, and this is also the reason you cannot use an engine harness or partial harness from an SD motor on your truck.
 
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Old 03-20-2010, 04:25 PM
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Originally Posted by Conanski
You're getting bad advice here don't change any of the wiring on your truck, simply disconnect everything at the engine sensors when you remove the existing motor and plug them back into the donor motor once it is installed.

However.. if you use a pre '94 5.0 you will have to change the cam because the firing order changed in '94. This matters because your truck uses sequential injection, and this is also the reason you cannot use an engine harness or partial harness from an SD motor on your truck.
Yup, complete skipped over the fact it's a 5.0, states it twice in the OP even.

Sorry about that....
 
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Old 03-20-2010, 04:34 PM
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do i have to change the cam or can i just re-route the plug wires if i use the 95 harness...... thanks for the help guys...
 


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