Idles fine, no power and shuts off when driving

Tiny
FORENSICS
  • MEMBER
  • 2003 FORD ESCAPE
  • 3.0L
  • V6
  • 4WD
  • AUTOMATIC
  • 144,000 MILES
My buddys car had to be towed back as it started stumbling and had no power. We replaced the EGR and the IAC and it idles and revs just fine in park but the moment you put it in drive it loses all power and starts stumbling and is incapable of being driven. I'm at a loss.

Oh, and the brakes are almost non existent and shuts off when trying to drive and the EGR is getting extremely hot
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Saturday, December 26th, 2020 AT 12:48 PM

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Tiny
FORENSICS
  • MEMBER
My Forscan program gave me these codes. The first two I understand from the OBD module but the rest I don't know what to do with.
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Saturday, December 26th, 2020 AT 1:23 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The one code is specific to the transmission range sensor. When you place it in gear, does the indicator show the correct gear selected? Also, is the battery fully charged and the alternator producing?

As far as the running, the IAT seems like the most likely concern. I have the diagnostics specific to this code. Take a look through them and let me know if you are comfortable with performing them.

__________________________________

Here is the diagnostic chart. The attached pics correlate with the directions. Note this test is for multiple vehicles.

2003 Ford Truck Escape 4WD V6-181 3.0L DOHC VIN 1 Duratec
DA: Intake Air Temperature (IAT)/Engine Coolant Temperature (ECT)/Engine Oil Temperature (EOT) Sensors - Introduction
Vehicle Powertrain Management Computers and Control Systems Testing and Inspection Pinpoint Tests DA: Intake Air Temperature (IAT)/Engine Coolant Temperature (ECT)/Engine Oil Temperature (EOT) Sensors - Introduction
DA: INTAKE AIR TEMPERATURE (IAT)/ENGINE COOLANT TEMPERATURE (ECT)/ENGINEOIL TEMPERATURE (EOT) SENSORS - INTRODUCTION
DA: Intake Air Temperature (IAT)/Engine Coolant Temperature (ECT)/Engine Oil Temperature (EOT) Sensors Introduction

DA: Pinpoint Tests See: Computers and Control Systems > Pinpoint Tests > DA: Intake Air Temperature (IAT)/Engine Coolant Temperature (ECT)/Engine Oil Temperature (EOT) Sensors - Pinpoint Test

Note

This Pinpoint Test is intended to diagnose the following:

- Intake air temperature (IAT) sensor (12A697)
- Integrated intake air temperature (IAT) sensor (12B579)
- Engine coolant temperature (ECT) sensor (12A648)
- Engine oil temperature (EOT) sensor (12A648)
- Harness circuits: IAT, ECT, EOT and SIG RTN
- Powertrain control module (PCM) (12A650)
The term "applicable" is used in this pinpoint test and refers to the temperature sensor indicated by the DTC. Example: ECTV, IATV, EOTV.

Tables and Graphs

Note:Engine coolant temperature must be greater than 10 C (50 F) to pass the KOEO Self-Test and greater than 82 C (180 F) to pass the KOER Self-Test. To accomplish this, the engine must be at normal operating temperature.

Ambient temperature must be above 10 C (50 F) to receive acceptable input from the intake air temperature (IAT) sensor.

Engine oil temperature must be greater than 10 C (50 F) to pass the KOEO Self-Test and greater than 66 C (150 F) to pass the KOER Self-Test.
Voltage values were calculated for VREF = 5.0 volts. These values can vary 15 percent due to sensor and VREF variations.

Pic 1

TEMPERATURE SENSOR VOLTAGE AND RESISTANCE SPECIFICATIONS

pic 2

Pinpoint Test Schematics and Connectors

For PCM connector views, refer to Section 1, Powertrain Control Hardware See: Computers and Control Systems > Diagnostic Trouble Code Tests and Associated Procedures > Powertrain Control Hardware.

Pic 3

PCM CONNECTOR PIN NUMBERS

pic 4

LS6/LS8, Thunderbird

pic 5

Focus

Note:On some applications the integrated IAT/MAF sensor connector is located inside the air cleaner assembly.

Pic 6

2.3L Focus (w/integrated IAT)

Note:On some applications the integrated IAT/MAF sensor connector is located inside the air cleaner assembly.

Pic 7

PCM CONNECTOR PIN NUMBERS

pic 8

Escort 4V, Taurus/Sable, FF Taurus, 3.8L/4.6L 2V, 4V Mustang, Crown Victoria/Grand Marquis, Crown Victoria NGV, Marauder, Town Car, Windstar, Ranger, Escape, Explorer/Mountaineer, Explorer Sport/Sport Trac, Aviator, Econoline, Excursion, 4.6L F150, 5.4L/6.8L F250/F350/F450/F550

Note:On some applications the integrated IAT/MAF sensor connector is located inside the air cleaner assembly.

Pic 9

PCM CONNECTOR PIN NUMBERS

pic 10

LS6/LS8, Thunderbird (w/integrated IAT)

Note:On some applications the integrated IAT/MAF sensor connector is located inside the air cleaner assembly.

Pic 11

PCM CONNECTOR PIN NUMBERS

pic 12

All Others

pic 13

PCM CONNECTOR PIN NUMBERS

pic 14

______________________________

Let me know if this helps.

Take care,
Joe
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Sunday, December 27th, 2020 AT 9:21 PM

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