Daughters car in limp mode

[agattoblanco]

Hey all first post here... Need some guidance on a throttle body problem and the car in limp mode
2005 4.0 everything is stock .
car just went into limp mode one day. When checking the codes there are a least 20 of them mostly relating to the throttle body. po121 po0221 02223 1200 1204 2107 -- and a whole bunch more. With here friends they bought an oem throttle body and installed it . Car is still ldeling rough and in limp mode.
I had the car towed to my house and now am working on it.
Battery is new
I will b clearing all the codes and doing the engine relearn today
The throttle body motor does not have a ground and the voltage is 3.7 volts.
I would like to trouble shoot this and figure out what is amuck and not throw parts at it but i need a littlle guidence ... Does anybody know where to start ? I am figuring i have to ohm out the ground wire but do not know where the wire would b on the pcm.
Please advise ....

 

[86GT351]

Replace the whole Throttle Body!

 

[Gladams]

Welcome to the club from Missouri. Start at the beginning of the air flow and work your way through to the air exit point. Check to make sure air is not stopped by dirty or clogged, filters or sensors, all the way down to the exhaust pipe exit. It looks like you already replaced the TB. Good luck.

 

[86GT351]

Hey all first post here... Need some guidance on a throttle body problem and the car in limp mode
2005 4.0 everything is stock .
car just went into limp mode one day. When checking the codes there are a least 20 of them mostly relating to the throttle body. po121 po0221 02223 1200 1204 2107 -- and a whole bunch more. With here friends they bought an oem throttle body and installed it . Car is still ldeling rough and in limp mode.
I had the car towed to my house and now am working on it.
Battery is new
I will b clearing all the codes and doing the engine relearn today
The throttle body motor does not have a ground and the voltage is 3.7 volts.
I would like to trouble shoot this and figure out what is amuck and not throw parts at it but i need a littlle guidence ... Does anybody know where to start ? I am figuring i have to ohm out the ground wire but do not know where the wire would b on the pcm.
Please advise ....

Was this new or used?

 

[DieHarder]

You'll need to record all of the codes. Since you have a bunch I'd start with chasing down what each one means; see DTCs (Diagnostic Trouble Codes) in the Powertrain Control & Emissions section to troubleshoot. Here's an online manual that may help you narrow down the issues.

Ford Workshop Service & Repair Manuals - fordrepair.info Home - 2005 Mustang

Ford Workshop Service and Repair Manuals, 2005 Mustang

iihs.net

Ford Workshop Service & Repair Manuals - fordrepair.info - 2005 Mustang 2005 Mustang Powertrain control and emissions diagnosis

Ford Workshop Service and Repair Manuals, 2005 Mustang Powertrain Control and Emissions Diagnosis

iihs.net

 

[VGMStudios]

Iihs.net has workshop manuals and wire diagrams for the car. I'd start by cleaning the TB and putting in a new air filter then drive to see what codes come back. Maybe put back the original TB. I know when I swapped the engine in my 06 with a 09, it didn't like the 09 TB. Also do the TB relearn if you are keeping the new one.

 

[agattoblanco]

Replace the whole Throttle Body!

We did with a ford oem

 

[agattoblanco]

You'll need to record all of the codes. Since you have a bunch I'd start with chasing down what each one means; see DTCs (Diagnostic Trouble Codes) in the Powertrain Control & Emissions section to troubleshoot. Here's an online manual that may help you narrow down the issues.

Ford Workshop Service & Repair Manuals - fordrepair.info Home - 2005 Mustang

Ford Workshop Service and Repair Manuals, 2005 Mustang

iihs.net

Ford Workshop Service & Repair Manuals - fordrepair.info - 2005 Mustang 2005 Mustang Powertrain control and emissions diagnosis

Ford Workshop Service and Repair Manuals, 2005 Mustang Powertrain Control and Emissions Diagnosis

iihs.net

 

[agattoblanco]

we dod write them down... most of them pointed to the throttle body... but there was way to many...

 

[agattoblanco]

And to not leave this thread hanging... thanks guys for the manual and sugestions. What eneded up working... i cleaned all the electrical connections even the gas pedal. Replaced the air filter. inspected all the grounds. Last thing i did was remove the Positive battery terminal, connect it to the ground terminal 15 minuites,,, say a prayer ... and vroom off she went... I belive that the computer was just over loaded like the cache on your windows ... but not sure
very greatfull for the help here

 

[VGMStudios]

You're welcome. Glad to know that you got it working.

 

[DieHarder]

And to not leave this thread hanging... thanks guys for the manual and sugestions. What eneded up working... i cleaned all the electrical connections even the gas pedal. Replaced the air filter. inspected all the grounds. Last thing i did was remove the Positive battery terminal, connect it to the ground terminal 15 minuites,,, say a prayer ... and vroom off she went... I belive that the computer was just over loaded like the cache on your windows ... but not sure
very greatfull for the help here

Never underestimate and power of prayer (along with the extra work of course). God helps those who help themselves....