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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

24# injector and mass air calibration

  • Thread starter Thread starter hlingar
  • Start date Start date Jul 27, 2008
H

hlingar

New Member
Jul 26, 2008
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0
Jul 27, 2008
#1
  • Jul 27, 2008
  • #1
I have installed 24# injectors on my 1995 GT what do I need to do to the mass air to complete the calibration. Thanks for your help.
 

Venom351R

Founding Member
Apr 27, 2002
4,548
41
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MAINE
Jul 27, 2008
#2
  • Jul 27, 2008
  • #2
What mass air meter do you have?
 

donkey_punch

New Member
Jan 16, 2004
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northern****ingjersey
Jul 27, 2008
#3
  • Jul 27, 2008
  • #3
you need a Maf thats calibrated to the 24# injectors
 
B

birel21y

New Member
Jul 28, 2008
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Reno, Nv
Jul 28, 2008
#4
  • Jul 28, 2008
  • #4
you need a Cobra computer. Mass Air does not effect it.
 

BlownFiveLiter

have car, will race....wait, it doesn't run
15 Year Member
Nov 29, 1999
3,133
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108
Chicagoland
Jul 28, 2008
#5
  • Jul 28, 2008
  • #5
Incorrect. You do not need a Cobra computer to run 24lb injectors. You need a MAF that's calibrated for 24lb injectors to use with the T4M0 computer, or a tune.
 
B

birel21y

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Jul 28, 2008
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Reno, Nv
Jul 28, 2008
#6
  • Jul 28, 2008
  • #6
Ive done this many times, about 6 gt to cobra swaps. If the mass air is stock, it is the same. Both cobra and gt mass air sensors have the exact part number through any auto parts stores. If you use the "GT" computer after the 24lb. injector swap, you engine will run very rich, and run like crap. Not to fire up the thread, but its been trial and error.
 

Yobi1Kanobi

Member
Apr 9, 2003
559
0
16
Jul 28, 2008
#7
  • Jul 28, 2008
  • #7
I just learn that the MAF has nothing to do with your INJ. You need to somehow tell your computer(EEC) that you have bigger INJ not your MAF. Your MAF tells your computer how much air is coming into the motor, then your motor tells you INJ how much to flow. But the EEC still thinks you have 19s and is going to dump way to much fuel using your 24s. then its going to read to rich at the O2 sensors, causing a condition of your EEC cant correct by itself....This is how i understand it. So you can either fool the EEC by getting a MAF that will reduce the voltage it reads at a giving amount of air. Or you can Tune the EEC to properly read the signal that is given by your stock MAF and It will know to release less fuel
 

final5-0

Mustang Master
Apr 6, 2003
6,817
12
79
DFW Texas
Jul 28, 2008
#8
  • Jul 28, 2008
  • #8
birel21y said:
you need a Cobra computer. Mass Air does not effect it.
Click to expand...

birel21y said:
Ive done this many times, about 6 gt to cobra swaps. If the mass air is stock, it is the same. Both cobra and gt mass air sensors have the exact part number through any auto parts stores. If you use the "GT" computer after the 24lb. injector swap, you engine will run very rich, and run like crap. Not to fire up the thread, but its been trial and error.
Click to expand...

Actually ... both of these Gentelmen are stating factual info

If we are talking about doing something WITHOUT a tune

24's won't work CORRECTLY on a t4m0 (GT pcm) without a caled
aftermarket meter that matches the inj size

If you moved to a j4j1 (COBRA pcm) the 24's would work just dandy with
the original or OEM meter that came on the GT from FORD

Grady
 
B

birel21y

New Member
Jul 28, 2008
16
0
0
Reno, Nv
Jul 29, 2008
#9
  • Jul 29, 2008
  • #9
final5-0 said:
Actually ... both of these Gentelmen are stating factual info

If we are talking about doing something WITHOUT a tune

24's won't work CORRECTLY on a t4m0 (GT pcm) without a caled
aftermarket meter that matches the inj size

If you moved to a j4j1 (COBRA pcm) the 24's would work just dandy with
the original or OEM meter that came on the GT from FORD

Grady
Click to expand...

+1 Final 5-0

That will work. If you want to keep it simple, just get a J4J1 cobra computer, and call it a day. Go to car-part.com, they usually go around $100 shipped.
 
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