2003 Ford Mustang - Answered Questions & Fixed issues

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3.8L and 4.0L Engines Firing order: 1–4–2–5–3–6 Distributorless ignition system

all in the links

P1125 FORD Code - Throttle Position Sensor Intermittent

https://www.engine-codes.com > p1125_ford Faulty Throttle Position Sensor · Throttle Position Sensor harness is open or shorted · Throttle Position Sensor circuit poor electrical connection. Missing: Error ‎P1120

• P1120 FORD Code - Throttle Position Sensor Out of Range

  https://www.engine-codes.com > p1120_ford Malfunction is detected when voltage from the sensor is sent to Engine Control Module (ECM) is out of range. 'What are P1120 FORD code possible symptoms? Engine ...

https://www.google.com/search?q=2003+Mustang+GT+DTC+Error+Code+P1125+and+P1120 ..

evaporative emission system ? https://www.youtube.com/watch?v=g4ClmBASUco https://www.youtube.com/watch?v=Dfj-F_pTj5M&t=8s

Try this website for help. www.crutchfield.com

check for fuel availability.

I'd start by having the tires balanced and remounted. Rotating them wouldn't hurt either. Start there.

80-90 ft/lbs torque . On aluminum wheels check torque after 200 miles . Then again until they do not tighten.

The fuel pump shut-off

switch is located on the

left side of the trunk

between the left rear tail

light and the trunk liner,

and to the left of the

hole in the trunk liner

To reset the switch:

1. Turn the ignition OFF.

2. Check the fuel system for leaks.

3. If no leaks are apparent, reset the switch by

pushing in on the reset button.

4. Turn the ignition ON.

5. Wait a few seconds and return the key to OFF. 6. Make another check of leaks

Code 171 is system to lean "1" code 174 system to lean "2" code 420 catalyst system efficiency below code 530 a/c refrigerant pressure sensor "A" sounds like o2 sensors are bad or vacuum leak

The idle is completely computer controlled, it is not adjustable.

Sensors do not need to be recalibrated , the ecm should have the codes cleared . Then turn the ignition system on with data reader hooked up to see if sensors repaired the fault code.

There are two possibilities...

1. The crankshaft and camshaft sensors are not properly synchronized to each other. This is a procedure that must be performed with special tools.
2. A bad alternator diode can cause this code to set due to voltage ripple. Have the alternator/charging system tested.

position sensors have little to do with rough running engine items like bad injectors, problem ignition control module, fuel pressure , HT leads valves, vacuum leaks all contribute to rough running best run the fault codes first to determine what area to look at and fix the reported faults

Hi Janet: Fast answer........ Yes. Depending on how wild you want to go??????? Madman McKay car stereo or any other local specialty shop, to DIY with whatever you've got available. Cheerfuls.

Did you check for spark ? Are the fuel injectors firing ? Does the check engine light come on when you turn the key to the on position , an then go out when you crank the engine over ? No Start Diagnostic Basics EricTheCarGuy

Do a Web search under the terms (Your make, model, year vehicle) intake manifold runner. Or intake runner control solenoids, rods, etc. You may find Youtube videos. The runners are sandwiched under or inside the intake manifold. Some had plastic clips which crumbled and the operating rods became disconnected. Some runners stuck too bad for the rods to move them.

The flashing service engine light blinking indicates a Catalytic converter damaging event is happening , a misfire ! Don't driver it like that ,you don't want to have to buy a catalytic converter ! They can cost as much as 1,000 dollars . Flashing Check Engine Light CarMD

Convertible Top Motor, Power Convertible Top. ...

That car has a lot of lights for a stop light. Maybe they require more than one fuse and/or relay. Hope this helps.

try tapping the wiper motor, with it turned on, with a hammer if it starts the motor is worn and needs replacing. you can try attaching a separate ground wire to the wiper motor if it runs then the motor has lost its ground and you can run it this way.