[MO3]

My car threw a (29DC) code last night after a hard acceleration to about 3k RPM. I was able to read the code using Cobb as there was no error messages in iDrive but there was a noticeable loss of power. I restarted the car and it was normal again. I searched and some say it's the LPFP going bad. (I've been running E85 for a couple of months "E50").

Today, I started the car at 4pm after not being driven since last night and and it sounded like it wasn't able to fire up! And when it finally did, RPMs started going up to 2k and dropping to 600 for a few second and then it threw the half engine message and the RPMs became stable at 1k. I immediately connected Cobb and read a (29F1) code. I cleared it and the car became normal. I flashed the 98RON map and drove as normal. I still have a quarter tank of E85 mix. I also did a search and this code is associated with the HPFP failure!

Now, should I just go ahead and replace the HPFP? Anyone of you guys who had HPFP failures experienced those symptoms or codes?

[DR-JEKL]

Cant help much as my HPFP hasn't acted up, but don't rule out your LPFP also as they are 'strained' in E85 applications due to the extra fueling demands required when running E85.

[MO3]

Another rough start today. Same symptoms minus the RPM thing! The fan was on also. Half engine message and a new code (29F2).
The car seems to drive just fine when warmed up. Starts normal with no long cranks!

[DR-JEKL]

It's time to give Pete a call & book yourself into advan

http://www.e90post.com/forums/showpo...93&postcount=4

[froop]

Hey Mo, I'm not sure about the LPFP but some of those symptoms and codes definitely sound like an HPFP failure. I've been through two. One on the E88 a while back at around 60,000kms and the other more recently on my E82 at only 38,000kms.

First was under warranty and the second one I bought a replacement from Stu and installed it myself.

How many kms on your car now and has it had the HPFP replaced before?

[Zen]

Originally Posted by MO3

And when it finally did, RPMs started going up to 2k and dropping to 600 for a few second and then it threw the half engine message and the RPMs became stable at 1k. I immediately connected Cobb and read a (29F1) code. I cleared it and the car became normal. I flashed the 98RON map and drove as normal. I still have a quarter tank of E85 mix. I also did a search and this code is associated with the HPFP failure!

Now, should I just go ahead and replace the HPFP? Anyone of you guys who had HPFP failures experienced those symptoms or codes?

I had replaced the HPFP by Pete in May of this year, and it had similar symptom such as yours. It would start and the car would start and sputter a bit, and the rpms starts going up and down before settling at 1k rpm.

Have you had your HPFP replaced before?

[MO3]

Thanks Shane, Alex and "zen".

The car has 95k kms and I had it since 56k kms. The first owner didn't even know what a HPFP was when I asked him if It's been replaced! So I guess it's on the factory HPFP.

[froop]

Originally Posted by MO3

Thanks Shane, Alex and "zen".

The car has 95k kms and I had it since 56k kms. The first owner didn't even know what a HPFP was when I asked him if It's been replaced! So I guess it's on the factory HPFP.

Woah, if your original pump has 95k kms on it that's pretty good haha. Most likely if his pump had failed he would know about it because he would have gone through the whole limp mode misfire thing which is pretty memorable.

Symptoms I experienced were misfires and/or limp mode with hard acceleration, long cold cranks, stalling when cold starting, RPM drops with cold starts etc etc.

Whether LPFP failure can also result in these symptoms I'm not sure but definitely all of the above are caused by HPFP failure.

Unfortunately HPFP prices have gone up significantly since I did mine in May. I think I paid about $360 but the price is now like $480 or something . If you don't plan on DIYing it's about 1-2 hours worth of labour. If you DIY it can be done in under 3 hours as a first timer, or probably 1-2 hours if you've had some experience.

[MO3]

Originally Posted by froop

Woah, if your original pump has 95k kms on it that's pretty good haha. Most likely if his pump had failed he would know about it because he would have gone through the whole limp mode misfire thing which is pretty memorable.

Symptoms I experienced were misfires and/or limp mode with hard acceleration, long cold cranks, stalling when cold starting, RPM drops with cold starts etc etc.

Whether LPFP failure can also result in these symptoms I'm not sure but definitely all of the above are caused by HPFP failure.

Unfortunately HPFP prices have gone up significantly since I did mine in May. I think I paid about $360 but the price is now like $480 or something . If you don't plan on DIYing it's about 1-2 hours worth of labour. If you DIY it can be done in under 3 hours as a first timer, or probably 1-2 hours if you've had some experience.

I think I'll tackle it myself. I was quoted $850 fitted. $520 parts and $330 labour.
What's the part # for the pump you ordered Alex and where from?

I found this info online:
"There is now a new type of HPFP available called Exchange High Pressure pump. This pump is fitted on the 1M with part number 13517616170 but its also the newest available for 335 MY 2007"

http://www.ecstuning.com/ES2189759/

[froop]

Originally Posted by MO3

I think I'll tackle it myself. I was quoted $850 fitted. $520 parts and $330 labour.
What's the part # for the pump you ordered Alex and where from?

I found this info online:
"There is now a new type of HPFP available called Exchange High Pressure pump. This pump is fitted on the 1M with part number 13517616170 but its also the newest available for 335 MY 2007"

http://www.ecstuning.com/ES2189759/

I bought mine from BMR. Part number was 13517616170.

$520 isn't too far off from the BMR price but it's still cheaper from BMR I think. Around $480. Website is down so I can't be sure. If you need help doing it let me know. I reckon I could replace one in under 2 hours now that I've done one.

[MO3]

Originally Posted by froop

I bought mine from BMR. Part number was 13517616170.

$520 isn't too far off from the BMR price but it's still cheaper from BMR I think. Around $480. Website is down so I can't be sure. If you need help doing it let me know. I reckon I could replace one in under 2 hours now that I've done one.

Thanks Alex!
$520 was BMR's quote!
13517616170 is exactly the part number for the HPFP from ECS Tuning. I'm going to order it from there for $348.80 shipped. And yes I guess I'll need your supervision!

[MO3]

Fitted the new HPFP on Saturday! Big thanks to Alex!
Car feels more responsive and accelerates better than before. I also noticed that my fuel consumption dropped from 15.8L/100kms to 13.5!
Put in the RB PCV valve while I was at it and also emptied the OCC which was 30% full!

[DR-JEKL]

Awesome work Moe, Alex will be my go to man I feel like im on limited time with mine (no idea if mine is the original or not)

[froop]

Originally Posted by MO3

Fitted the new HPFP on Saturday! Big thanks to Alex!
Car feels more responsive and accelerates better than before. I also noticed that my fuel consumption dropped from 15.8L/100kms to 13.5!
Put in the RB PCV valve while I was at it and also emptied the OCC which was 30% full!

No problems Mo! It was good fun! Yours was much easier than mine since we didn't have to remove the intake manifold haha

[kaitan]

Originally Posted by froop

No problems Mo! It was good fun! Yours was much easier than mine since we didn't have to remove the intake manifold haha

You need to start charging lol :P Froop autowerks!

Originally Posted by MO3

Fitted the new HPFP on Saturday! Big thanks to Alex!
Car feels more responsive and accelerates better than before. I also noticed that my fuel consumption dropped from 15.8L/100kms to 13.5!
Put in the RB PCV valve while I was at it and also emptied the OCC which was 30% full!

Glad to hear that the problem is fixed....hahah 13.5l wow thats high. I'm only getting 12ltr with alot of city driving and alot of short trips.

Do you nothing anything different with the OCC or it's just a preventive mod?

[froop]

Originally Posted by kaitan

Glad to hear that the problem is fixed....hahah 13.5l wow thats high. I'm only getting 12ltr with alot of city driving and alot of short trips.

Do you nothing anything different with the OCC or it's just a preventive mod?

Man both of yours is really high haha.

15.8

I'm probably averaging around 10 these days. Not really much traffic driving but not highway anymore with mostly back streets with lots of traffic lights too. When I lived in Newport I was averaging closer to 9.

I've noticed that my manual tends to be significantly more fuel efficient than the 6AT convertible though. Could be weight but could be just different driving habits too I guess.

[DR-JEKL]

I get around 12.5L in city/suburban driving but I believe Moe runs an ethanol tune (maybe he only runs this at the strip?) which would use more fuel (ethanol burns faster)?

I also noticed on the bmw spec sheets the 335i AT are more fuel efficient than the MT which was surprising as generally it was the other way around with most cars (I guess that was back in the days of 5 spd manuals vs 4 speed autos!)

[kaitan]

Originally Posted by DR-JEKL

I get around 12.5L in city/suburban driving but I believe Moe runs an ethanol tune (maybe he only runs this at the strip?) which would use more fuel (ethanol burns faster)?

I also noticed on the bmw spec sheets the 335i AT are more fuel efficient than the MT which was surprising as generally it was the other way around with most cars (I guess that was back in the days of 5 spd manuals vs 4 speed autos!)

But e85 is cheaper per litre right ?? yeah it used to be the other way around auto drinks more than manual but now almost every new autos are more efficient than manual .

[DR-JEKL]

Originally Posted by kaitan

But e85 is cheaper per litre right ?? yeah it used to be the other way around auto drinks more than manual but now almost every new autos are more efficient than manual .

Yes but AFAIK the higher consumption negates the cheaper price per L, it's all for powah!