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Billy
Billy, Trainer/Master tech.
Category: UK Car
Satisfied Customers: 3498
Experience:  Trainer - master tech., SAE member
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citroen relay 2.0 hdi 54 plate when i drive and push throttle

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citroen relay 2.0 hdi 54 plate when i drive and push throttle all the way to floor it stalls engine management light comes on turn ignition off then on and will start if i drive with out excess throttle can drive for miles

Billy :

Hello and thank you for using Just answer! I'm Billy and i will assist you with this. Feel free to ask if further info is needed.

Billy :

I would suggest that you check the accelerator pedal sensor (located just above the pedal itself), and its respective wiring and connectors.

Billy :

The throttle body, also needs inspections, mainly for loose connectors or faulty wiring as well.

Billy :

However, since you are getting the warning light, then fault codes are stored in the system.

Billy :

And these fault codes can and should be retrieved using a proper diagnostics equipment (scan tool), the fault codes should pinpoint the faulty component(s) or wiring, or at least give you somewhere to start checking.

Billy :

Regards,

Billy :

Billy

Customer:

hi billy i changed pedal but no change i do have auto diagnos machine but not been updated since 2006 anyway as the engine light went off as soon as it is restarted no dtcs show how ever its now shows falt i got this information on monitor list on autodiagnos with it connected driving only no code just communication error

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Customer: replied 5 years ago.
hi billy i changed pedal but no change i do have auto diagnos but not been updated since 2006 anyway as the engine light went off as soon as it is restarted no dtcs show however its now showing communication error it also has a fault with alarm not as dtc but in monitor list on machine when it is connected and driving the communication error is dtc and will clear but returns when stalls
Well in that case, you may check the connectors of the ECU (engine control unit), and the connectors on the wiring harnesses (looms), and make sure that you have good ground....
As a loose connector or poor ground might caused this issue....
This fault might also trigger the alarm issue.......

Regards,
Billy
Customer: replied 5 years ago.
do you think the alarm is the issue
no....

I think the loose connector or poor ground is causing both problems.......

It could be something else, however, it most likely is a faulty wiring....

Regards,
Billy
Billy and other UK Car Specialists are ready to help you
Customer: replied 5 years ago.
still have problem would presure rail sensor cause this problem bearing in mind it only stalls when driving under full throttle will rev without fail
Hello,

The rail pressure sensor could cause this, however, using the live data stream on your scan tool, you should be able to confirm if this is faulty......

Regards,
Billy