V70 engine stalling

[mandela]

Hi, I am looking for some advice.

The engine in my V70 2.4 petrol (2004) tends to drop in RPM whilst braking or coming off the throttle, sometimes it stalls. My garage that services it suggests it is a dirty inlet to the throttle body. I have cleaned the throttle body air paths and the proplem still exists. I am wondering if I have a faulty sensor or throttle pot calibration issue?

Anyone had a similar experience?

[Skellen]

Does it throw up the engine light?

You need to get the codes read, but the culprits could be:

Mass Air Sensor
02 sensor(s)
Throttle body (but if it an 04 and a facelift then they (I think) had solved those problems by then)

Does it do it more from cold start? Has you fuel economy dropped?

We had this on our 2001 and it was the air meter. Alas it needs to be coded to the car so won't be cheap.

Edited by Skellen on Tuesday 3rd January 14:12

[mandela]

Thanks for your time Skellen.

No fault light, does not do it from cold only when warm and economy is fine.

I should state that the engine RPM falls as if it wants to stall, then rises back to a steady decent tick over

[Skellen]

mandela said:

Thanks for your time Skellen.

No fault light, does not do it from cold only when warm and economy is fine.

I should state that the engine RPM falls as if it wants to stall, then rises back to a steady decent tick over

Lack of light does not mean it is not likely to have triggered a fault code, but you never know. Getting codes read is your best bet as it will be a guessing game otherwise.

Is it auto or manual?

Has all the normal maintenance been done - fuel filters, plugs and the like?

[mandela]

Hi again, sorry it is a manual.

Had regular maintenance, plugs would of been replaced but doubt fuel filter though.

[Skellen]

Hmmmm.

I'd be tempted to go for 02 sensor. Might be breaking down when hot?

[morgrp]

Could be a coil pack going down - often like the sensors they throw up a fault code though

The ETM may need cleaning and setting up correctly - job for someone who knows what they are doing