[nate158]

Hey Forum,

2014 F30 335i 6MT MPPK and Dinantronics, 93k miles

Had this car for about 2 years and haven't had any problems.

Pulled into a gas station last week and when I came back and started the car it was running very rough, then shut off completely. Error codes, limp mode, etc.

Shutoff and restarted multiple times. Car cranked for a while and wouldn't start. Let it sit for a few minutes, started again. No problems, but CEL on.

I got the car home and ran the codes from OBD.


P1290 P0100 P15DF are permanent codes.

P0300 pending. All cylinders besides 3 have misfire codes pending. Also have P12B9 pending.


I searched around on the forum a bit and I'm thinking that it could be the HPFP. However I found some info that suggested it could be related to the Dinantronics tuner or the MAF.

I think I'll start by replacing the HPFP but any suggestions would be greatly appreciated.

Thanks!
Appreciate0

[Jvac]

Originally Posted by nate158

Hey Forum,

2014 F30 335i 6MT MPPK and Dinantronics, 93k miles

Had this car for about 2 years and haven't had any problems.

Pulled into a gas station last week and when I came back and started the car it was running very rough, then shut off completely. Error codes, limp mode, etc.

Shutoff and restarted multiple times. Car cranked for a while and wouldn't start. Let it sit for a few minutes, started again. No problems, but CEL on.

I got the car home and ran the codes from OBD.


P1290 P0100 P15DF are permanent codes.

P0300 pending. All cylinders besides 3 have misfire codes pending. Also have P12B9 pending.


I searched around on the forum a bit and I'm thinking that it could be the HPFP. However I found some info that suggested it could be related to the Dinantronics tuner or the MAF.

I think I'll start by replacing the HPFP but any suggestions would be greatly appreciated.

Thanks!
Appreciate0

I would start by removing the Dinan for a few weeks. That's considerably easier than replacing the fuel pump. See if the problems persist. It could be the wiring harnesses or power/ground connections to the ecu tuner that are wearing out. These can cause all sorts of malfunctions or codes if so.
You might also give that maf sensor a proper cleaning if you haven't done so in a while. That's a quick job. Once both of those parts are out of the equation, then start looking at other causes.

[thejeremyman9]

Originally Posted by Jvac

I would start by removing the Dinan for a few weeks. That's considerably easier than replacing the fuel pump. See if the problems persist. It could be the wiring harnesses or power/ground connections to the ecu tuner that are wearing out. These can cause all sorts of malfunctions or codes if so.
You might also give that maf sensor a proper cleaning if you haven't done so in a while. That's a quick job. Once both of those parts are out of the equation, then start looking at other causes.

+1.

Step 1 is always removing tune hardware/software.

[435gc]

Hpfp would be one of the later things to address unless you are getting low fuel pressure codes.

Misfires are most frequently ignition related.

The removal of the tuner as already said is the best appropriate 1st step.

Then look at plugs and then move to coils.

Potentially could be a tank of shit gas if all was fine until the fill up and issues immediately arrose after.

[nate158]

Thanks for the replies. I appreciate the input.

I looked around and it seems that code P15DF is related to the fuel pump pressure being too low.

I didnt fill up at the station, so I can rule out bad gas.

I see how it could be related to the Dinantronics tuner, but I'm still leaning towards the HPFP due to the P15DF code.
It's a 2014 which, as far as I can tell had an updated version of the fuel pump to fix early problems. However its an early production model so I'm thinking it may have the faulty fuel pump

[nate158]

I've decided to change out the high pressure fuel pump and I'm going to pull the intake and change a few other parts while I'm in there.

I'm going to replace the starter, the charge pipe and walnut blast the valves too. All the parts should be here soon.

Are there any other things you recommend to change under the intake while it's off?

Thanks

[AmuroRay]

Chargepipe?