Volvo 850 idle problem when engine cold

[White850Turbo]

Are you sure of the fault code meaning.

in http://www.volvospeed.com/Repair/ftrap.php it is written that A7 refers to Combined Instrument.

If it has been A2, I would have agree.

Do you confirm?

My apologies ... was thinking of something else. Well... the DTC's that are stored should not have anything to do w/ the stalling issue. Has the fuel filter been changed in the last 50,000 miles? Fuel pump ever been replaced?

The 1993 models are somewhat strange b/c the codes are different from the later models, and the ignition and fuel system codes are split up between the A2 and A6 socket.

[Pejip]

Hi,

I have changed the fuel pump and the fuel filter about 25 000 miles ago.

Pejip

[MadeInJapan]

Unplug your MAF sensor and see if it makes a difference. Just a thought but at least this way you may be able to illiminate that from the equation. I had a bad MAF sensor and when unplugged my car idled fine. With it plugged back in I got very poor idle, bucking, etc. Replaced it with one from fcpgroton and no more issues....that was 3 months ago.

[Pejip]

Thanks I will try.

Does someone know whether it is possible to change the throttle position sensor without going to a Volvo dealer?
Does it require a reconfiguration of the ECU?

Thanks

[White850Turbo]

Thanks I will try.

Does someone know whether it is possible to change the throttle position sensor without going to a Volvo dealer?
Does it require a reconfiguration of the ECU?

Thanks

No, the throttle position sensor is a part that must be purchased either from the dealer or a parts seller such as FCP Groton or EEuroparts.

[Pejip]

Thanks for the answer.
But my question was more, can I change it by myself if I got a new TPS? Do I need some electronics stuff to configure the ECU.

Thanks

[White850Turbo]

Oh, no. Not at all. You just remove the old one and put the new one on. No programming required for ECU.