Downpipe Problem Help...

[TrevorM3]

ok guys, had my dp's installed today.. no CEL YET.. lol


anyway, car sounded good, revved fine. went to drive off, manual mode, tried to hit the gas and the car sputtered, almost like it had no fuel. Did this several times... Car did not have ANY dash lights come on etc.. just when i punch it, it sorta cuts out. Right now i left it at the mech, until tomorrow..


what could this be? currently shitting bricks, as the car has 450 miles on it.

Is the car just acting funny because the air intake is more/less, is there a teach in time where i have to run the car for a little then it will be fine... any suggestions??

[ARC550]

Check al lines after install

[sales@vivid]

Which downpipes did you do?

Catted or non catted?

[Redrckt135]

Funny I had my downpipes installed today too, sounds amazing and the car feels insane. Maybe there's a boost leak of some sort? Did you tune the car? If you don't have a tune that can very well be the problem.

[TrevorM3]

Non catted. No tune. They came off my dads m5. Not sure which downpipes...


Dads car did NOT have a tune ran perfect.

[momos750]

Did they reconnect the O2 sensors back up?
Sounds like they didn't reconnect something.

[TrevorM3]

I hope its something simple. If o2 sensors werent plugged bak up, wouldnt it throw a code?

[momos750]

Ya I hope it's something simple bud!
You would think so but who knows. Maybe some of the vendors that have installed them will chime in.

[TrevorM3]

spke to my tech at bmw.. he said it's possibly an intake not connected right, or the broke a crankcase hose. good lord i hope it isn;t the latter.

[KMORGSM5]

Get JB4+BCM and call it a day, won't regret it

Hope it's just an issue with install. DP's shouldn't cause harm to anything

[momos750]

Whatever it is hold your installer responsible since BMW won't fix it if it has something to do with the DP install.

[apexlocator]

Doesn't the dealer unlock or change something after the 1200 mile break-in? I recall reading about that somewhere. I don't know since I purchased used, but perhaps catless DP are a bit too early??

[momos750]

Originally Posted by apexlocator

Doesn't the dealer unlock or change something after the 1200 mile break-in? I recall reading about that somewhere. I don't know since I purchased used, but perhaps catless DP are a bit too early??

At the 1200 mile break in service the dealer unlocks the launch control via a software update.
No other changes are made other than an engine oil change and differential oil change.

[TrevorM3]

we'll see what the word is today...

[allmotor_2000]

Did he plug in all the DME cables properly?

[TrevorM3]

sigh of relief, i forgot what he said when he called me today.. his tech forgot to connect a ground or something..

picked up, ripped it, it's fine. waiting patiently for CEL to come on lol

[ur20v]

Great news thats it a simple mistake and easy fix!

How does it sound and feel Trevor?

[TrevorM3]

Originally Posted by ur20v

Great news thats it a simple mistake and easy fix!

How does it sound and feel Trevor?

my advice is, if you are contemplating doing downpipes, do it.


You hear the turbo spool, car sounds sick!


Some people may not be able to bear the cold start though, it's a little obnoxious. You can get it removed, but if you hate your neighbors, leave it.

[wesleyan92]

Originally Posted by TrevorM3

my advice is, if you are contemplating doing downpipes, do it.


You hear the turbo spool, car sounds sick!


Some people may not be able to bear the cold start though, it's a little obnoxious. You can get it removed, but if you hate your neighbors, leave it.

+1 - the neighbor line is hilarious - well played!

[LI-M5]

Originally Posted by TrevorM3

, but if you hate your neighbors, leave it.

I'm doing strait pipe's and a dwnpipe and i like my neighbors lmaoooo !

[Eddybro]

Originally Posted by LI-M5

I'm doing strait pipe's and a dwnpipe and i like my neighbors lmaoooo !

Tell me how much you love it Trevor lol. It's like love at first start up and drive after. Bahahah

[TrevorM3]

Originally Posted by Eddybro

Tell me how much you love it Trevor lol. It's like love at first start up and drive after. Bahahah

did you delete cold start with mikes tune? or did you keep it?