busandcamper
Member
So our 2009 UK spec started displaying some classic symptons you guys have seen before..
I purchased the car from a used car dealer and within days we had a 'would not start issue' even though the engine was warm, however, it starts fine next day. Our local main VW dealer diagnosed fuel contamination, said they could smell it, and then cleaned everything, flushed and put half a tank of diesel in it. I do not have the receipt for this as this was paid for by the used car dealer as a peace offering and to try and get to me accept the car. Thinking this is all good now, I agreed and took delivery back from the dealer, I also checked and there were no codes in the engine.
Just 3 days later my wife gets a limp home condition and flashing glow plug, she also described an audible buzzing sound from the engine bay, she drove home and parked. When I get to the car it starts and runs fine with no limp home displayed or other permanent message but VCDS shows
1 Fault Found:
000135 - Fuel Rail/System Pressure
P0087 - 000 - Too Low
I then drive 5 miles and I too get the limp home condition and as I have the laptop and VCDS with me I plug in, the pressures looked ok-ish, with the actual following the specified quite well. Logging the data I see the odd sample where the difference is -88 bar but on the whole the differences are seldom more than 20 bar. The buzzing sound is there and sounds like a fast whirring coming from the back left hand side of the engine as you look in.
I parked up for 5 days to read about what all this could mean - this forum has a LOT of technical info that has been great. I want to get the car to my local VW guy (an independant). The car starts perfect, all pressures looked good, the buzzing sound is gone too, so I then elect to drive 10 miles to the independant VW dealer - I logged the journey on VCDS to try and capture the limp home trigger point. Did not happen, nor did the buzzing sound, and my local guy is puzzled as the car behaves perfectly but has 2 limp home codes.
We're in diagnosis mode so they inspect the main filter to be perfect clean, the quantity regulator on the HPFP also spotless, the fuel tank lift pump is also super clean. So we have ruled out HPFP failure as there is no contamination/particles/debris etc. And besides it sounds like when they go - they go.
What could it be? The quantity regulator or the pressure regulator - to me the pressure regulator is on the right hand side on the end of the rail (correct?) and the quantity regulator is on the left front on the pump. Neither of these match the approximate location that time when we heard the noise.
What next? Gamble the pressure regulator at about $300 or the quantity regualtor (price unknown as yet)?
Anyone had one of these fail or a similar buzzing sound / failed component?
Appreciate some thoughts on this, and thank you for reading this far into a new guys first post - I normally hang out on the air cooled forums on other sites being a die hard VW guy. Regards.
I purchased the car from a used car dealer and within days we had a 'would not start issue' even though the engine was warm, however, it starts fine next day. Our local main VW dealer diagnosed fuel contamination, said they could smell it, and then cleaned everything, flushed and put half a tank of diesel in it. I do not have the receipt for this as this was paid for by the used car dealer as a peace offering and to try and get to me accept the car. Thinking this is all good now, I agreed and took delivery back from the dealer, I also checked and there were no codes in the engine.
Just 3 days later my wife gets a limp home condition and flashing glow plug, she also described an audible buzzing sound from the engine bay, she drove home and parked. When I get to the car it starts and runs fine with no limp home displayed or other permanent message but VCDS shows
1 Fault Found:
000135 - Fuel Rail/System Pressure
P0087 - 000 - Too Low
I then drive 5 miles and I too get the limp home condition and as I have the laptop and VCDS with me I plug in, the pressures looked ok-ish, with the actual following the specified quite well. Logging the data I see the odd sample where the difference is -88 bar but on the whole the differences are seldom more than 20 bar. The buzzing sound is there and sounds like a fast whirring coming from the back left hand side of the engine as you look in.
I parked up for 5 days to read about what all this could mean - this forum has a LOT of technical info that has been great. I want to get the car to my local VW guy (an independant). The car starts perfect, all pressures looked good, the buzzing sound is gone too, so I then elect to drive 10 miles to the independant VW dealer - I logged the journey on VCDS to try and capture the limp home trigger point. Did not happen, nor did the buzzing sound, and my local guy is puzzled as the car behaves perfectly but has 2 limp home codes.
We're in diagnosis mode so they inspect the main filter to be perfect clean, the quantity regulator on the HPFP also spotless, the fuel tank lift pump is also super clean. So we have ruled out HPFP failure as there is no contamination/particles/debris etc. And besides it sounds like when they go - they go.
What could it be? The quantity regulator or the pressure regulator - to me the pressure regulator is on the right hand side on the end of the rail (correct?) and the quantity regulator is on the left front on the pump. Neither of these match the approximate location that time when we heard the noise.
What next? Gamble the pressure regulator at about $300 or the quantity regualtor (price unknown as yet)?
Anyone had one of these fail or a similar buzzing sound / failed component?
Appreciate some thoughts on this, and thank you for reading this far into a new guys first post - I normally hang out on the air cooled forums on other sites being a die hard VW guy. Regards.