[jayk877]

03/18/2012
car is doing alot better...seems to have been bad gas...put shell in and did a bunch of pulls and is now pushing 14psi in all gears. thanks for the help and hopefully problem solved. also been talking with terry so hopefully it works out

03/17/2012

HAVING PROBLEM AGAIN SEE POST #8..

CVS pic on post #14

[jayk877]

filled up and did a few pulls and now its smooth and pulls like a beast...any ideas on what it could have been? need new plugs? i just installed the downpipes about 12 hours ago

[elim11]

Perhaps some sort of adaption/ learning. As long as it is okay how you should be fine. If you want to be safe you can always log and send it to terry

[RnmEvo9]

Should log it and send the logs to Terry.

[bootay]

Significant changes to your system (changing maps and changing DPs) may require adaptation, 3 WOT runs (3rd gear run all the way out) and you're set. Since the problem went away quickly, that's almost assuredly all it was.

[Laid Black 335i]

Yup, that's how it was with my car. After DP install, the car was not used to being catless. It was fine shortly after.

[Beemw335]

Ecu needs to adapt to less back pressure, once adapted it will have less lag.
That is why running electric cutouts is stupid, opening them for a race doesnt give the ecu any time to adapt..

[jayk877]

ok so now im having the problem again....the car pulls hard until 3rd gear...gets 14psi and then falls flat after about 60-70 and wont get more than 9psi....ive done a dozen pulls thinking maybe its learning but since its still doing it i dunno what to do....any other ideas? plugs? or dirty valves? what causes boost lose all of a sudden? seemed to pull harder without downpipes...

[BMWsky]

Are there any codes being thrown?

[jayk877]

no there are not....just got back from doing logging.....this is very interesting...according to the jb4 i was on map2 and then all of a sudden it switches to map4 during shifting...this is very confusing but im about to post the log in excel form to show everything...and maybe get some answers

[jayk877]

HERE IS THE SPREAD SHEET...pay close attention to the gears im in and MAP also ONLY getting have boost on map2....any help would be great!!!!

bout to send this to terry and see if he can help!


https://docs.google.com/spreadsheet/...WFuWkE3aXB4UXc

[LivnLife31]

Did you fix the V clamp this morning? Still runs like shit?

[jayk877]

Originally Posted by LivnLife31

Did you fix the V clamp this morning? Still runs like shit?

yes i did fix that but it wasnt the problem still only running half boost on map2 and then it switches itself to map4 ....im soo confused on wtf but in second gear it pulls hard and is getting 14psi..look at the spread sheet

[jayk877]

CVS of the map2 switching to map4 also check out the log....seems my AFR is triggering a safety mode in the jb4 hmmmm any thought? i could be completely wrong so help me out with your ideas what could be the problem already emailed terry!

[Velocity26]

Meth stops flowing ... lost prime?

[Mike@N54Tuning.com]

The JB4 switches to map 4 for various safety reasons like over boost, run lean, excessive knock detection, etc. In your case since you just put downpipes on I'm guessing it's the run lean protection. Normally triggers after downpipe installs if an o2 sensor is damaged or mixed up. An exhaust leak could also cause it.

Mike

[jayk877]

Originally Posted by Mike@N54Tuning.com

The JB4 switches to map 4 for various safety reasons like over boost, run lean, excessive knock detection, etc. In your case since you just put downpipes on I'm guessing it's the run lean protection. Normally triggers after downpipe installs if an o2 sensor is damaged or mixed up. An exhaust leak could also cause it.

Mike

thanks if it was something damaged wouldnt there be a code? terry is looking at my new logs i just took about 10 min ago. thanks for your input