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Help! 1995 MUSTANG GT 5.0 won’t start after install

  • Thread starter Thread starter Motor_City_MUSCLE
  • Start date Start date Aug 10, 2023

Motor_City_MUSCLE

New Member
Aug 9, 2023
5
0
1
Omaha, NE
Aug 10, 2023
#1
  • Aug 10, 2023
  • #1
Help! 1995 mustang gt does not turn on after installing throttle body and CAI. When key is turned to the ON position, the check engine light does not come on. I have heard it could be a failed PCM. How could a PCM fail while/after this type of install?!? Instead… Could this be associated with the mass air flow sensor or TFI since I was touching and working with these connections. Could these prevent the car from starting?

I have rechecked all connections dozens of times. Fuel is at 3/4, battery is at 85%, and throttle body has been tested before installing CAI.

Any help is appreciated. Thanks.
 

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General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,945
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203
polk county florida
Aug 11, 2023
#2
  • Aug 11, 2023
  • #2
Cranks but no start situation?
Have you tried starting fluid?
 
Reactions: Motor_City_MUSCLE

Motor_City_MUSCLE

New Member
Aug 9, 2023
5
0
1
Omaha, NE
Aug 11, 2023
#3
  • Aug 11, 2023
  • #3
Motor_City_MUSCLE said:
Help! 1995 mustang gt does not turn on after installing throttle body and CAI. When key is turned to the ON position, the check engine light does not come on. I have heard it could be a failed PCM. How could a PCM fail while/after this type of install?!? Instead… Could this be associated with the mass air flow sensor or TFI since I was touching and working with these connections. Could these prevent the car from starting?

I have rechecked all connections dozens of times. Fuel is at 3/4, battery is at 85%, and throttle body has been tested before installing CAI.

Any help is appreciated. Thanks.
Click to expand...
General karthief said:
Cranks but no start situation?
Have you tried starting fluid?
Click to expand...
I have tried starter fluid. I after I tried I realized the CEL isn’t coming on when the key is in the on position. I think it’s the TFI. I’m going to replace that. Fingers crossed. But one note the TFI in my car looks different that what LMR sells. Hmmm maybe it’s just original old one vs. new one.
 

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General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,945
10,584
203
polk county florida
Aug 11, 2023
#4
  • Aug 11, 2023
  • #4
Go to Rockauto, you will see choices,
 

Motor_City_MUSCLE

New Member
Aug 9, 2023
5
0
1
Omaha, NE
Aug 11, 2023
#5
  • Aug 11, 2023
  • #5
I replaced the TFI. And still no start.
 

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Motor_City_MUSCLE

New Member
Aug 9, 2023
5
0
1
Omaha, NE
Aug 11, 2023
#6
  • Aug 11, 2023
  • #6
Motor_City_MUSCLE said:
I have tried starter fluid. I after I tried I realized the CEL isn’t coming on when the key is in the on position. I think it’s the TFI. I’m going to replace that. Fingers crossed. But one note the TFI in my car looks different that what LMR sells. Hmmm maybe it’s just original old one vs. new one.
Click to expand...
I put the old throttle body back on it fired right up. SR 75 mm throttle body. It looks beautiful but doesn’t work. I might be missing something but that’s for another day
 
J

Jayhzwrld

New Member
Jan 17, 2026
1
0
1
Arizona
Jan 17, 2026
#7
  • Jan 17, 2026
  • #7
Motor_City_MUSCLE said:
I put the old throttle body back on it fired right up. SR 75 mm throttle body. It looks beautiful but doesn’t work. I might be missing something but that’s for another day
Click to expand...
Have you solved the issue for the 1995 mustang gt I am also having the same problem currently
 
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