V70R Overfueling & High Fuel Pressure

Sparrowhawk · Nov 1st, 2020, 20:55

Hey guys,

I’ve just bought a V70R P2 ‘06 auto privately

When I bought it the car was running beautifully and was extremely fast

Within 100 miles the orange and green warning light came on and it started misfiring and hesitating occasionally - fault code read High Fuel Pressure

Extinguished code and gave it a full service

Removed K and N filter, plugs, fuel filter etc and returned everything to stock

Car ran like a dream albeit slightly slower for a full tank of Super Unleaded then started misfiring again and irregular (not smooth) gear changes

Back to the garage - no warning like but threw up High Fuel Pressure code again

Replaced fuel pressure sensor and Air Mass meter - cancelled codes - car ran like a dream again for a full tank of unleaded

Same issues return - misfiring and hesitating

Also, after every garage visit and code reset the car runs far more smoothly and economically regards MPG but as the miles creep up the MPG gets lower and lower

Occasionally there sounds like there’s a lot going on under the bonnet, motors running and whining etc, even after short steady drives on A roads

Has this been poorly remapped or something?

Nov 1st, 2020, 20:55	#1
Sparrowhawk Member Last Online: Mar 21st, 2024 23:20 Join Date: Oct 2013 Location: Newport	V70R Overfueling & High Fuel Pressure Hey guys, I’ve just bought a V70R P2 ‘06 auto privately When I bought it the car was running beautifully and was extremely fast Within 100 miles the orange and green warning light came on and it started misfiring and hesitating occasionally - fault code read High Fuel Pressure Extinguished code and gave it a full service Removed K and N filter, plugs, fuel filter etc and returned everything to stock Car ran like a dream albeit slightly slower for a full tank of Super Unleaded then started misfiring again and irregular (not smooth) gear changes Back to the garage - no warning like but threw up High Fuel Pressure code again Replaced fuel pressure sensor and Air Mass meter - cancelled codes - car ran like a dream again for a full tank of unleaded Same issues return - misfiring and hesitating Also, after every garage visit and code reset the car runs far more smoothly and economically regards MPG but as the miles creep up the MPG gets lower and lower Occasionally there sounds like there’s a lot going on under the bonnet, motors running and whining etc, even after short steady drives on A roads Has this been poorly remapped or something?

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