Running catless downpipes without a tune

cools20 · 03-05-2014, 03:50 AM

Hey i was wondering how long i can run catless downpipes without a tune? Possibly installing downpipes this friday and will be diving it all week/weekend till i get the tune by some point next week. Can i install them this week or will it screw up the motor/turbos/ext in any way. (I know the cel will be on)

frank35 · 03-05-2014, 08:49 AM

You can install them without any problem

robertm · 03-05-2014, 11:47 AM

Service engine soon light will come on after about 60 miles or so. Just means the post cat O2 sensors are reading bad emissions. Doesn't effect anything else.

Eyeman · 03-05-2014, 07:37 PM

I modded my 135 sort of as I got good deals on things. An AR Dp groupbuy got me way before I got a few different tunes. So I've spent plenty of time with downpipes and no tune with no complications. The worst that might happen is your car might stumble or possibly misfire when the ECU tries to clear the situation before it throws a SES light. So technically you might want to take it easy when you don't have an SES light.

cools20 · 03-05-2014, 09:26 PM

Quote:

Originally Posted by frank35

You can install them without any problem

Quote:

Originally Posted by robertm

Service engine soon light will come on after about 60 miles or so. Just means the post cat O2 sensors are reading bad emissions. Doesn't effect anything else.

Quote:

Originally Posted by Eyeman

I modded my 135 sort of as I got good deals on things. An AR Dp groupbuy got me way before I got a few different tunes. So I've spent plenty of time with downpipes and no tune with no complications. The worst that might happen is your car might stumble or possibly misfire when the ECU tries to clear the situation before it throws a SES light. So technically you might want to take it easy when you don't have an SES light.

alright awesome thanks for the help guys! ill be sure to take it easy for the 1st 60 miles till the light goes on, and i get the tune. thanks again

03-05-2014, 03:50 AM	#1
cools20 A God 13 Rep 183 Posts Drives: 135i Join Date: Jul 2013 Location: Socal iTrader: (1)	Running catless downpipes without a tune Hey i was wondering how long i can run catless downpipes without a tune? Possibly installing downpipes this friday and will be diving it all week/weekend till i get the tune by some point next week. Can i install them this week or will it screw up the motor/turbos/ext in any way. (I know the cel will be on) __________________ #BecauseRacekor
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03-05-2014, 08:49 AM	#2
frank35 Private 14 Rep 88 Posts Drives: 335I JB3 DCI Join Date: Feb 2011 Location: SF iTrader: (0)	You can install them without any problem
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03-05-2014, 11:47 AM	#3
robertm Major 450 Rep 1,358 Posts Drives: 2020 M2 Comp Join Date: Oct 2007 Location: dfw iTrader: (0)	Service engine soon light will come on after about 60 miles or so. Just means the post cat O2 sensors are reading bad emissions. Doesn't effect anything else.
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03-05-2014, 07:37 PM	#4
Eyeman Colonel 119 Rep 2,036 Posts Drives: 2008 135 blk, blk, step Join Date: Jan 2009 Location: Atlanta, GA iTrader: (0) Garage List 1994 Porsche 968 Cab [0.00] 2017 AMG GTS [0.00] 1994 Porsche 968 Coupe [0.00] 1977 Mercedes 450SE ... [0.00] 2008 135 [8.00]	I modded my 135 sort of as I got good deals on things. An AR Dp groupbuy got me way before I got a few different tunes. So I've spent plenty of time with downpipes and no tune with no complications. The worst that might happen is your car might stumble or possibly misfire when the ECU tries to clear the situation before it throws a SES light. So technically you might want to take it easy when you don't have an SES light. __________________ Injen, RR OCC, MadDad Whisper, donut spare, 19x8.5et43fr 19x9.5et45r Volk LE37's, rear fenders rolled/pulled, PSS4S 225/35fr 255/30r, KW V1's, AR coated catless dps, Cross strutbar, CF grills and license plate holder, iCarbon diffuser, ETS black anodized FMIC, M3 control arms, Quaife, ER chargepipe, ForgeDV's, Topspeed Custom Tune, V3sims, Braille, Andrey_GTA rear hub mod, Ebay Mstyle front bumper and performance style side skirts.
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