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V70 stalling

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Old Nov 11th, 2021, 23:28   #1
TomW
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Default V70 stalling

I have a 2003 standard petrol V70 .
She starts perfectly but stalls if I'm not careful when letting the clutch out.
Changing up the gears she jerks missing a beat as I let the clutch out and then picks up.
She accelerates away normally. Take my foot off the throttle when coming to a stop and she stalls. Once I can get her to idle she will carry on idling with no problem.
I don't know where to start.

Last edited by TomW; Nov 11th, 2021 at 23:30.
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Old Nov 12th, 2021, 12:23   #2
john.wigley
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I was hoping that someone more knowledgeable than I would answer this one, but here goes ...

My car is a year or two older, but the basic principles of fault finding remain the same.

You need to narrow this one down, 'TomW', with systematic investigation and elimination. How long have you had the car? what do you know of it's history; what's been done, and what not? Any dash lights on?

Stalling can be due to one (or more) of many possible causes. It could be something as simple as a blocked fuel tank vent or something much more involved.

For starters, I would check with a view to elimination:
1 - Blocked fuel tank vent
2 - Choked fuel filter
3 - Failing fuel pump
4 - Engine management system fault
5 - Induction vacuum leak

Above all, do be systematic and, no matter how tempting, do not adopt a 'scatter-gun' approach.

Good luck, Regards, John.
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Old Nov 12th, 2021, 12:37   #3
TomW
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Thanks for those suggestions.

Bought it last year but never put it on the road as kept stalling when I got it home, so it's just been driven for a mile or so each month since.
It's a bi fuel lpg but she refuses to switch onto lpg.
I thought I should sort out the petrol side of things first before investigating the lpg.
I've seen on other forums the Etm may need a clean.

Where is the fuel tank vent and the petrol fuel filter?
Might I need to replace the fuel filter or just clean it?

Last edited by TomW; Nov 12th, 2021 at 12:45.
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Old Nov 12th, 2021, 13:21   #4
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fuel filter replacement its a disposeable service part.
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Old Nov 12th, 2021, 14:14   #5
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fuel filter is under the car in front of the rear drivers side wheel. you cant really clean it, it's a replacement job, they're not expensive

also, checking air filter is literally a 2minute job.. take it out and give it a quick visual to see if filled with crap, replace if suspect

also could be a metering issue, get some maf cleaner and give it a whirl

avoid messing with ETM without getting some specific advice first from someone who knows best

hard to say more without diagnostic info
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Old Nov 12th, 2021, 14:16   #6
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I don't know about bi-fuels but the fuel filter in my '02 petrol was ahead of the LR wheel. It's one 10mm bolt to undo the keeper and the fuel lines had easy to push opposing buttons. I give a whisper of silicone paste to the nipples of the new filter.

My fuel tank vent was above the RR fender liner. You need to drill out the body rivets to remove the liner. Have a pop rivet gun and 6 or 8 larger pop rivets ready for reassembly.

Check engine vacuum with a vacuum gauge. Look for unattached lines or empty barb fittings.
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Old Nov 12th, 2021, 23:28   #7
TomW
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Thanks for the help. I'll be onto it over the weekend.
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Old Nov 13th, 2021, 09:06   #8
john.wigley
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Quote:
Originally Posted by TomW View Post
Thanks for the help. I'll be onto it over the weekend.
Good plan, Tom. Start by making the quick and easy checks mentioned, with a view to elimination, or rectification, if necessary.

If all is good, and the problem persists, you could move on to check more complex possibilities. I would, however, echo Stuart's good advice about not tackling things that you are not confident of without advice, as this can exacerbate the problem.

Get hold of a good workshop manual for your specific model and work through the checks indicated. Try to narrow the issue down and don't hesitate to come back if you need more specific advice; you will find folk very helpful.

Regards, John.
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Old Nov 14th, 2021, 23:16   #9
TomW
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I hunted everywhere infront of both rear wheels for the plate going over the fuel filter. Maybe it's different for the bifuel. I'll put a post in the lpg forum.
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Old Nov 15th, 2021, 11:18   #10
stuart bowes
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I thought you said it was a standard petrol ? There is no plate over the filter on mine, its just hanging there obvious as anything

Lpg though may well be a different kettle of fish

Edit sorry I obviously missed the info in post 3
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