[shawntech]

My fuel pressures are fine new plugs and coils ports walnut blasted.

Made zero differnce, chugs on most cold starts... dealer just charged me $80 diag fee to tell me it's the best idling 335 they've serviced... someone needs to figure this out

[924er]

I wouldn't doubt my that my valves are dirty at 30k miles, I mostly drive freeway miles no boosting so my car gets a lot of babying esp wit the alpina tune car shifts early on D. I think babying your 335i makes valves worse lol

I'm still going to log everything and repost but I doubt my fuel pressures are bad cuz there are is a beast right now.

[carlsontheflyer]

Originally Posted by Ingeniator

Something is a little wonky on the hp side. Grab the WOT log when you have a chance. Make sure to log all values. We want per cylinder timing, lambda both banks. WGDC actual both banks. Both requested/actual fuel pressure high and low. We also need tps actual to check for throttle closures. I'm sure I'm forgetting some but that would give a good snapshot.

You are right. There is something "a little wonky" going on. I made a couple more logs this morning. Both are idle logs. One is when the engine was still cold, and the other one when it was warmed up. It behaved when it was cold, but once the engine was fully warmed up, it started misbehaving. It was idling at 650ish while it was cold, and it was smooth, but once it warmed up, it began to idle at 800ish, a few times I felt the car shake slightly like the OP described, and the logs look strange, especially the hpfp values. I did blip the throttle a couple of times during the warmed-up log when I felt the car shake a little, and the shaking disappeared, and then came back after a few seconds of idle again.

Edit: This is a PTF custom map based on Cobb Stage 1+FMIC Aggressive, but the car behaves the same way when running on the Cobb OTS map, and also when running on stock firmware, so it's not map related. I'll log a couple of WOT runs later today.

http://datazap.me/u/carlsontheflyer/...1&data=1-17-18

[Ingeniator]

Originally Posted by carlsontheflyer

You are right. There is something "a little wonky" going on. I made a couple more logs this morning. Both are idle logs. One is when the engine was still cold, and the other one when it was warmed up. It behaved when it was cold, but once the engine was fully warmed up, it started misbehaving. It was idling at 650ish while it was cold, and it was smooth, but once it warmed up, it began to idle at 800ish, a few times I felt the car shake slightly like the OP described, and the logs look strange, especially the hpfp values.

Edit: This is a PTF custom map based on Cobb Stage 1+FMIC Aggressive, but the car behaves the same way when running on the Cobb OTS map, and also when running on stock firmware, so it's not map related.

http://datazap.me/u/carlsontheflyer/...1&data=1-17-18

I'm leaning towards a bad IPR valve. It could be sticking. This would require a new hpfp as it is integrated. Grab the WOT log to see if you are meeting requested under heavy load?

[924er]

That's weird your car idles at 650 when cold. Most cars not only BMW idle pretty high when cold then taper down. Post more logs! And that's ingeniator for helping us out!!

[carlsontheflyer]

Originally Posted by Ingeniator

I'm leaning towards a bad IPR valve. It could be sticking. This would require a new hpfp as it is integrated. Grab the WOT log to see if you are meeting requested under heavy load?

Thanks for all your input!

IPR valve = Injection Pressure Regulator? (Google)

Also there no no codes what so ever. I checked using my Cobb, and my mechanic, who is a certified BMW indie, with his Autologic and BMW-specific tools. No codes. If the HPFP needs replacing, I'll have a hell of a time convincing a BMW dealer to replace it under BMW HPFP extended warranty of 120k miles (my car is at 51k miles). They usually won't do anything unless it throws a code.

I'll log a couple of WOT runs in 3rd gear later today and post them tomorrow.

Thanks again, man!

[carlsontheflyer]

Originally Posted by 924er

That's weird your car idles at 650 when cold. Most cars not only BMW idle pretty high when cold then taper down. Post more logs! And that's ingeniator for helping us out!!

For the first 2 years of ownership, it has always idled at 650ish. I mean, on cold starts, for the first 20 seconds or so it idles higher, but then always settled down at 650ish. But for the last almost year, the idle has been "a little wonky". It'll idle at 650ish until oil temps reach about 220F or so, and then idles at 800ish. But it's not consistent either. It'll idle at 650 for a couple of days, then idles at 800 for a few days, so on and so forth. Or it'll idle at 800, then I'll make a stop somewhere for 5 minutes and it'll idle at 650 after that, or not.

I haven't been able to find a pattern, or tie it to any external factors. I always use 93 fuel and always from QuickTrip, which is a top tier fuel recommended by BMW. And this behavior persists through all weather types, all seasons, rain or shine. I had it at 2 Atlanta area BMW dealers and several certified BMW indies for this problem, and NOONE can figure it out.

And also, engine power is not affected by it at all. With the current tune, Virtual Dyno shows 380 whp and 420+ wtq, and it pulls HARD!

[924er]

From what I been reading on the boards is that these engines idle at a different speeds depending on temp or other factors. Someone correct me if I'm wrong.

And yeah I hate when BMW refused to work on a car if there are no codes but that's not always the case. They are still supposed to test Ur cars components. If all goes bad I seen a rebuilt HPFP for $280 just google it

[carlsontheflyer]

Originally Posted by 924er

From what I been reading on the boards is that these engines idle at a different speeds depending on temp or other factors. Someone correct me if I'm wrong.

And that's what I've been told as well, but for the last year I've made it a point to find factors that influence the idle, and so far I can tell you with a considerable amount of certainty, that is completely random.

Originally Posted by 924er

And yeah I hate when BMW refused to work on a car if there are no codes but that's not always the case. They are still supposed to test Ur cars components. If all goes bad I seen a rebuilt HPFP for $280 just google it

If it all goes bad, I am sure it'll throw a code and it will be fixed under the BMW HPFP extended warranty of 120k miles. And they'll pay for the tow truck too.

[Jklad]

Regarding expectations of dealer replacing the hpfp, my car threw a code for which the hpfp is often the cause, and they told me that the hpfp is not under warranty unless one of the hpfp wArranty specific codes actually pops up. Since I have p2b2c which is not listed under the extended hpfp warranty, even if the hpfp is the issue, I will have to pay.

[924er]

Ok I got an Idle log when the car was kinda cold. i logged fuel pressures how does it look?


http://www.datazap.me/u/moswissa/idl...18-19-20-21-22

[924er]

and here is a 3rd gear pull with the PIDS u requested


http://www.datazap.me/u/moswissa/dri...14-15-16-17-22

[ATLIEN]

Originally Posted by BlueBimmer

try putting in some of that Chevron Techron stuff - it is amazing and may fix your issue for $12! You'll also notice better mpgs and a smoother run up the rpms.
BMW uses it too!

2nd this.

[Ingeniator]

Originally Posted by 924er

Ok I got an Idle log when the car was kinda cold. i logged fuel pressures how does it look?


http://www.datazap.me/u/moswissa/idl...18-19-20-21-22

Originally Posted by 924er

and here is a 3rd gear pull with the PIDS u requested


http://www.datazap.me/u/moswissa/dri...14-15-16-17-22

Your hpfp is all over the place at idle on the first log. Though I'm not positive that is what is causing your idle speed issues.

As for the 3rd gear pull. It looks pretty bad. Your timing is crap. Also you missed the fuelling pids. Nuke a couple of the wgdc and lambda pids. We only need bank1/2 actual values for those. That way you have enough room for actual/requested on the low and high fuel pressures. I would run a few more logs. What tune are you running?

[Ingeniator]

Originally Posted by carlsontheflyer

Thanks for all your input!

IPR valve = Injection Pressure Regulator? (Google)

Also there no no codes what so ever. I checked using my Cobb, and my mechanic, who is a certified BMW indie, with his Autologic and BMW-specific tools. No codes. If the HPFP needs replacing, I'll have a hell of a time convincing a BMW dealer to replace it under BMW HPFP extended warranty of 120k miles (my car is at 51k miles). They usually won't do anything unless it throws a code.

I'll log a couple of WOT runs in 3rd gear later today and post them tomorrow.

Thanks again, man!

Yeah IPR= Injection pressure regulator. On the 335 it is built into your hpfp. It is a computer controlled solenoid valve that controls how much fuel recirculates back to the pump suction from the discharge. Post up the logs. If I'm not around I'm sure someone will chime in. @wedge1967 @135pats @SteveAZ

[924er]

Originally Posted by Ingeniator

Your hpfp is all over the place at idle on the first log. Though I'm not positive that is what is causing your idle speed issues.

As for the 3rd gear pull. It looks pretty bad. Your timing is crap. Also you missed the fuelling pids. Nuke a couple of the wgdc and lambda pids. We only need bank1/2 actual values for those. That way you have enough room for actual/requested on the low and high fuel pressures. I would run a few more logs. What tune are you running?

are u serious??!! Im using stage 1 DRIVE with 91 octane and thats the most conservative map COBB offers

this 91 octane is a joke. there is an e85 station down the street but cobb always warns me not to use it.

ill post more logs in a min

[924er]

ok here is another Idle log


http://www.datazap.me/u/moswissa/idl...18-19-20-21-22


and here are some 3rd WOTs

http://www.datazap.me/u/moswissa/dri...18-19-20-21-22


http://www.datazap.me/u/moswissa/dri...=0&data=1-6-22

[924er]

Bump

[Ingeniator]

Originally Posted by 924er

ok here is another Idle log


http://www.datazap.me/u/moswissa/idl...18-19-20-21-22


and here are some 3rd WOTs

http://www.datazap.me/u/moswissa/dri...18-19-20-21-22


http://www.datazap.me/u/moswissa/dri...=0&data=1-6-22

Idle looks good. As for the 3rd gear pulls. Looks like your timing isn't a one off bad log. You fuelling isn't horrible but I do see signs that your IPR valve isn't responding quite right. As for why your timing is dropping to nothing I'm not entirely sure. You have no throttle closures and your not running really lean. It might be knock but I'm not 100% sure it is as it isn't violent timing pulls on a per cylinder basis. Try another log with load and requested load. I want to see if you are meeting the load target as that is how the dme controls everything.

[924er]

yeah its probably crappy fuel quality causing knock. here is a log of the stock BMW mapping stage 0. i see some major throttle closures for some reason. Do i need to have there maps run for some time before i log? i kinda just flashed it and gave it a few pulls then logged

http://www.datazap.me/u/moswissa/sto...-21-22&mark=39


I will log requested load next with stage 1 drive for the next log.

[Ingeniator]

Originally Posted by 924er

yeah its probably crappy fuel quality causing knock. here is a log of the stock BMW mapping stage 0. i see some major throttle closures for some reason. Do i need to have there maps run for some time before i log? i kinda just flashed it and gave it a few pulls then logged

http://www.datazap.me/u/moswissa/sto...-21-22&mark=39


I will log requested load next with stage 1 drive for the next log.

Yeah that looks like knock timing pulls. I'm almost positive your hpfp needs to be replaced. It is not meeting requested very consistently at all.

I'll keep an eye out for your next log.

[924er]

should i replace my HPFP? i seen a rebuilt one online for $300. Im under CPO warranty and HPFP warranty but i doubt i can use those because my car is throwing no codes and acting normal. i can't show them these catalogs lol