No power and stalling

XJR850Sen24v · Sep 15th, 2019, 14:00

Hi,

I have a 1994 Volvo 850 2.5 auto, which I've owned for the last several years. It was always very reliable but two years ago was taken off the road. It was started regularly and started first time every time. However this year I did some work to get it ready for mot, replaced the wheels, new catalytic converter and also gave it a service.

But now it's developed a problem and for the life of me I can't work out what's going on with it.

I start the car and it starts off fine, but it has no power, even with foot to the floor on private land it was quicker walking and the engine nearly stalled several times.
I replaced the spark plugs as I thought one might be dodgy. However that didn't work and now the car can't be moved, it starts, idles lovely but within a minute then starts to vibrate badly and then the engine cuts out. Press the accelerator down and it sounds awful, no power and just really bad sputtering. Starts again, and same thing happens. I've changed the fuel pump as that's what I thought it was but made no difference.

Don't really want to sell this one on as a project. Its been in the family too long and I'd hate to see it go.

Any help with this would be great.

Thanks.

volvo again · Sep 15th, 2019, 14:21

Possibly camshaft sensor...
Is the eml on?
Not sure if this model has the code reader under the bonnet behind o/s headlight or you may need to make a flash code reader

cyclogenesis · Sep 17th, 2019, 13:50

Check all your pipes and hoses first. These cars are bad with induction or vacuum leaks.
If it runs it sounds like electrics are okay so it must be air or fuel related or the mixture is wrong. This could either be an air leak or sensor fault causing it to run rich or lean and then cut out. My first step would be to check the security of the pies, jubilee clips and look very hard for any splits

Gonzobard · Sep 18th, 2019, 20:54

If it has been sat for a while could it be stale fuel / water in the fuel from condensation?

Sep 15th, 2019, 14:00	#1
XJR850Sen24v New Member Last Online: Sep 15th, 2019 14:26 Join Date: Sep 2019 Location: Abergavenny	No power and stalling Hi, I have a 1994 Volvo 850 2.5 auto, which I've owned for the last several years. It was always very reliable but two years ago was taken off the road. It was started regularly and started first time every time. However this year I did some work to get it ready for mot, replaced the wheels, new catalytic converter and also gave it a service. But now it's developed a problem and for the life of me I can't work out what's going on with it. I start the car and it starts off fine, but it has no power, even with foot to the floor on private land it was quicker walking and the engine nearly stalled several times. I replaced the spark plugs as I thought one might be dodgy. However that didn't work and now the car can't be moved, it starts, idles lovely but within a minute then starts to vibrate badly and then the engine cuts out. Press the accelerator down and it sounds awful, no power and just really bad sputtering. Starts again, and same thing happens. I've changed the fuel pump as that's what I thought it was but made no difference. Don't really want to sell this one on as a project. Its been in the family too long and I'd hate to see it go. Any help with this would be great. Thanks.

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Sep 15th, 2019, 14:21	#2
volvo again Master Member Last Online: Today 10:46 Join Date: Jun 2018 Location: Presteigne, mid Wales	Possibly camshaft sensor... Is the eml on? Not sure if this model has the code reader under the bonnet behind o/s headlight or you may need to make a flash code reader

Sep 17th, 2019, 13:50	#3
cyclogenesis Senior Member Last Online: Mar 14th, 2024 07:29 Join Date: Nov 2004 Location: Portsmouth	Check all your pipes and hoses first. These cars are bad with induction or vacuum leaks. If it runs it sounds like electrics are okay so it must be air or fuel related or the mixture is wrong. This could either be an air leak or sensor fault causing it to run rich or lean and then cut out. My first step would be to check the security of the pies, jubilee clips and look very hard for any splits

Sep 18th, 2019, 20:54	#4
Gonzobard Member Last Online: Oct 6th, 2023 07:12 Join Date: Mar 2019 Location: Reading	If it has been sat for a while could it be stale fuel / water in the fuel from condensation?

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