[335dsport]

Hello all,

My name is Vince,
I am a new bmw and 335d owner. I did the deletes about 5 months ago with a stage 2 tune from Eurocharged. It has about 95k miles and is msport.

Ran great up until a couple weeks ago. I got in it to drive and it was a very labored start. I did have the gas light come on a few miles before. Pulled up to the gas station, filled up, and all I can get now is the engine “turning over”.

I know my lift pump went out. Replaced it, but did not help. Replaced the fuel filter for the second time in six months just in case. Then replaced the high pressure fuel pump and high pressure sensor. No change in the fuel rail pressure. Max I get is 1.4 barr.

I checked the old hpfp, cracked it open to inspect for metal shavings which was thankfully clean. When replacing the old hpfp, the internals that I could see looked good.

Cracked line at the hpfp input to fuel rail and have no pressure. The pressure going to the hpfp seems good.

Please help! Thanks and have a good weekend!

[Nadir Point]

Can you be more descriptive/specific on the "labored start" part? Long crank, sputtering? Exactly what was it doing the last time it fired?

[335dsport]

I would say a long crank followed by Sputtering on the last start I got out of it. It took s about a minute to a minute and a half to start. After start it ran fine for half a mile to the gas station. 4 stops with no rough idling. One of the stops was a lengthy light.

[Nadir Point]

Sounds like air in the LP side.

[335dsport]

Originally Posted by Nadir Point

Sounds like air in the LP side.

Do you know of a good bleed procedure? The one i keep coming up with is the vehicle on but not running for a minute. Of course I’ve gone longer.

[Nadir Point]

It's not a matter of bleeding anything if you're getting air upstream of the hpfp. Be advised - this is just a WAG based on the symptom description. But one way to check it is just disconnect the hpfp, run the lift pump and watch what comes out. If you see any air bubbles, there must be a bad/broken fitting, line or connector somewhere.

[335dsport]

So new update. Lift pump is pumping out 70 psi which is spec. No contaminants or obstructions noticed up to hpfp. Still 1.4 bar max coming out of new hpfp output line.

[janboshoff]

Have you run the rail pressure test control in ista? Sounds like either a stuck close fuel volume control valve on the high pressure pump, stuck open pressure regulating valve (on the rail) or a leak somewhere on the high pressure side.

However, for all these option, it seems 1.4bar is low, and a leak would likely have resulted in diesel gushing out somewhere.

No expert, but I'm dealing with a similar fuel issue. See the Saga: post elsewhere.

[335dsport]

I don’t believe my friend has ista. He has two separate diagnostic devices specifically for European cars. I replace the hpfp again and tested the valve. All seemed good. I spliced in a pressure gauge Just before the line goes into the hpfp and it was reading 70 psi which is what the lift pump is supposed to put out. We bench tested the second hpfp we remove and it appears you need the crank to spin and the 70 psi of pressure in order for the pump to work. The viewport on the front of the engine shows the nut spinning.

[dmanb2b]

reach out to dudmd...they can fix it up

[Dr.Rockso]

Check valve on HPFP stuck open, fuel is going back to tank.

[Yozh]

Is flow control valve new?

[335dsport]

Hello all,

Sorry for the delay. My friends shop was busy and I have been busy.

Got a third hpfp in it today. The lift pump actually got fuel through the hpfp this time after we primed the pump on the bench before installation. The car did not start. Then we put the original software back on the DME.

Turns out that the adblue caused a non start condition on the car approximately 60 miles before the car stopped. Apparently the tune had code suppression in it....

Does anyone know how to get this condition off the car or how the dme stops the engine from starting?

[Yozh]

Sorry to say this but this is one more reason for going with reputable tunes that know what they are doing. There is plenty of information out there and with simple search no one should end up in a situation like yours where they are a victim to shoddy tuning. Hope you can get your money back.

[Nadir Point]

Originally Posted by Yozh

Sorry to say this but this is one more reason for going with reputable tunes that know what they are doing.

Unfortunately in a black market, those values only become evident with experience - good OR bad.

[335dsport]

Thanks everyone!!! Apparently retuning it properly will take that no start code off the ecu. The tuner is reputable but apparently not with diesel. You live and you learn right?