Engine revs

Tiny
RIPTO
  • MEMBER
  • 2004 FORD FIESTA
  • 1.4L
  • FWD
  • MANUAL
  • 73,000 MILES
Eac fail warning comes on whenever car started and the engine revs involuntarirly the car is in a local garage and they have tried various things without finding the fault; acu has been checked and is ok all wiring has been chacked for corrosion or looseness and is all ok
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Saturday, December 7th, 2013 AT 2:31 AM

18 Replies

Tiny
KEN
  • ADMIN
Hello,

This is usually due to a throttle actuator problem. Here is a guide to help you see what you are in for when changing the actuator out.

https://www.2carpros.com/articles/how-a-throttle-body-works

Here is a Bulletin as well

TECHNICAL SERVICE BULLETIN No.75/2007
26 October 2007

Subject/Concern: Loss of power; Electronic accelerator control failure message displayed in the instrument cluster in conjunction with diagnostic trouble codes (DTCs) P2135, P2119, P2176
Model:
Fiesta 2002.25 (11/2001 09/2008) Build Date: 01.08.2004-31.01.2007
Build Code: 4E-7C
Engine: 1.25L Duratec-16V (Sigma)
Engine: 1.4L Duratec-16V (Sigma)
Engine: 1.6L Duratec-16V (Sigma)
Fusion 2002.75 (06/2002 ) Build Date: 01.08.2004-31.01.2007
Build Code: 4E-7C
Engine: 1.25L Duratec-16V (Sigma)
Engine: 1.4L Duratec-16V (Sigma)
Engine: 1.6L Duratec-16V (Sigma)
Markets: All
Section: 303-04
Summary

Should a customer express concern about loss of power and that the electronic accelerator control failure message is displayed in the instrument cluster, the probable cause is a contact corrosion on both, the pins within the TP sensor and the fuel charging wiring harness electrical connector, causing the following diagnostic trouble codes (DTCs) to be stored in the Powertrain Control Module (PCM).

P2135: Throttle/Pedal Position Sensor/Switch A / B Voltage Correlation

P2119: Throttle Actuator Control Throttle Body Range/Performance

P2176: Throttle Actuator Control System - Idle Position Not Learned

To rectify this concern, the electronic throttle body must be removed, a new TP sensor and a new fuel charging wiring harness with both gold plated pins should be installed.

NOTE: Due to sensitive signals the repair of the wiring harness is NOT allowed. New and old level parts must NOT be used in a combination.

NOTE: A damaged electronic throttle body and the removed fuel charging wiring harness must be returned to the Parts Recall Center via the usual send-in procedure.

Parts Required
Description Finis Code Quantity
Kit-Electronic throttle control
Kit-Electronic throttle control consists of: 1 509 254 1
Fuel Charging wiring harness 1
TP sensor 1
Screw 4
Electronic throttle body (if required) see Ford Ecat 1

Production Action
A revised TP sensor and fuel charging wiring harness has been introduced into production by 01.02.2007 (build code 7K).

Service Instruction
See Summary.

TP sensor connector - Check

1. Connect the WDS/IDS portable diagnostic unit to the vehicle and establish communication (VID the vehicle).

Confirm the vehicle details are correct.

2. NOTE: General vehicle electrical issues can have effect on other systems. Battery voltage and electrical relay issues should be rectified before this service instruction is carried out.

Check the battery voltage.

Switch on the heated rear window and the headlamps.
If the battery voltage is below 11.3 V recharge the battery and carry out a road test to verify. If the concern is still present, go to next step.

Electronic throttle body - Remove

1. Remove the electronic throttle body from the intake manifold. For additional information, refer to Fiesta 2002.25; Fusion 2002.75 Workshop Manual Section 303-04.

TP sensor - Renew

1. CAUTIONS:

Open the cover in a clean environment to make sure no contamination enters. Care must be taken when removing the cover as it is possible for a gear to fall out. Do not apply any load to the TP sensor during assembly.

TP sensor screws are installed using locking compound and could shear when removing. To prevent this, the screws should be partially removed by two or three revolutions then tightened again. If a screw shears a new throttle body (see Parts Required) must be installed.

NOTE: The damaged electronic throttle body must be returned to the Parts Recall Center via the usual send-in procedure.

Install a new TP sensor with four new screws (see Parts Required).

Tighten the screws in the sequence shown.

2. NOTE: The electronic throttle body function test must be performed before installing the electronic throttle body. When the electronic throttle body motor is not in use, the throttle flap sits slightly open in a

Check out the diagrams (Below)

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Sunday, December 24th, 2017 AT 3:17 PM
Tiny
ROB123456
  • MEMBER
  • 2005 FORD FIESTA
  • 27,000 MILES
05 ford fiesta and recently put a new cat into it only last week and got a full service, but in the last 3 days its started over reving uncontrollibly with the slightest touch on the accelerator, its just not picking up speed with it. It seems as if its not catching on or something is slipping
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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
You question was partially deleted because you wrote it on the title line.
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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
ROB123456
  • MEMBER
Hi I have a 05 ford fiesta and recently put a new cat into it only last week and got a full service, but in the last 3 days its started over reving uncontrollibly with the slightest touch on the accelerator, its just not picking up speed with it. I was wondering would you have any idea whats wrong?

Thanks
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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
If you are in gear and the engine revs but the car doesn't speed up, it sounds like the transmission is slipping.
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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
ROB123456
  • MEMBER
It would pick up speed gradually but its just going through revs, you could change to 2nd at 2500 rpm and it would just shoot up to 5000 rpm the minute its changed
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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
ROB123456
  • MEMBER
If it was the transmition slipping what would need to be done to fix it?
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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
DIMPELS
  • MEMBER
  • 2005 FORD FIESTA
  • 4 CYL
  • FWD
  • MANUAL
  • 95,000 MILES
Electrical problem
2005 Ford Fiesta 4 cyl Front Wheel Drive Manual 95000 miles

GOOD DAY
I HOPE YOU WOULD BE ABLE TO HELP ME. I DRIVE A FORD FIESTA ST 2.O 2005 MODEL.
WHEN I START THE CAR IT GIVES ME A EAC FAIL ON THE DASHBOARD, BUT THE CAR STILL DRIVES, BUT IT REVES VERY HIGH AND IT WILL GIVE ME THE EAC FAIL FOR 3-4 TIMES UNTIL I AM ON THE GO THEN I DRIVES AS NORMAL, BUT JUST WHEN YOU SWITCH THE CAR OFF AND START IT AGAIN THE REVES GOES HIGH AGAIN. THE MECHANICS CAN'T FIND THE FAULT HERE, CAUSE THE ENGINE HAS A CHIP IN. WHAT COULD IT BE? PLEASE ADVISE.


http://www.2carpros.com/forum/automotive_pictures/418111_PICT0271_1.jpg

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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
DAVE H
  • EXPERT
Have the vehicle remapped (remove the chip) to see if the EAC returns to it's normal operation !
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+1
Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
That is what it sounds like. Make sure the trans fluid is clean and full. Remember, check automatic transmissions with the engine running and in park (unless it says something different on the dip stick)

If it is a manual transmission, the clutch is seperate from the transmission. If you are unsure if it is slipping, you need to have it checked by a tech.
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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
TINGSTER10
  • MEMBER
  • 2002 FORD FIESTA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 40,000 MILES
Engine Performance problem
2002 Ford Fiesta 4 cyl Front Wheel Drive Automatic 40000 miles

Hi I have 1.3 duratec engine and the engine over revvs to 3000rpm intermittently but when the clutch is depressed it lowers than when the clutch isnt engaged and now the car wont start at all now.
I have read around that this could be due to a failure on the Throttle Position sensor but I am not sure?
I would like to know anythin that would help included the location of said sensor.
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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
DAVE H
  • EXPERT
Throttle position sensor is located on the throttle body.
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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
GREGGY24
  • MEMBER
  • 2007 FORD FIESTA
  • 85,000 MILES
Seem to have a problem when I start my car first thing and after I have driven it. When I start the car the rev seems to drop down to 200rev and sometimes stalls do we have any idea what this problem could be?

Thanks
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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
HMAC300
  • EXPERT
Try cleaning the throttle plate on both sides with choke cleaner and iac hole first.
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Sunday, December 24th, 2017 AT 3:18 PM (Merged)
Tiny
PAWAN339
  • MEMBER
  • 2009 FORD FIESTA
Engine Performance problem
2009 Ford Fiesta 4 cyl Front Wheel Drive Manual 9 kmph miles

Whenever I try o change my gear from lower to top or from top to lower my Engine Speed increases to maximum. I dont know why this is happening and last day it crosses all the limits and engine was producing a lot of sound.
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Sunday, December 24th, 2017 AT 3:19 PM (Merged)
Tiny
DAVE H
  • EXPERT
Return the car to the dealer to be checked out? It is still under warrenty
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Sunday, December 24th, 2017 AT 3:19 PM (Merged)
Tiny
ROBERT MUNRO
  • MEMBER
  • 2002 FORD FIESTA
Engine Performance problem
2002 Ford Fiesta 4 cyl Front Wheel Drive Manual 12OOOO miles

If you try to rev the engine, it dies down before it revs. Also acceleration is really slow. This problem started after the battery had been disconected and re-connected
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Sunday, December 24th, 2017 AT 3:19 PM (Merged)
Tiny
DAVE H
  • EXPERT
Have the vehicle plugged into a diagnostic computer to check for fault codes stored
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Sunday, December 24th, 2017 AT 3:19 PM (Merged)

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