Downpipe install gone wrong.

Adamteee · 06-23-2011, 06:17 PM

So here's the story, help would be appreciated and I checked the message board for a problem like this before to no avail. A guy approached me one day talking about how he loved 335's and I was like cool, we chat a bit and I mention I was getting downpipes. He tells me he was a BMW tech before joining the military and he'd put them on for me for a hundred bucks. I was like hell yeah, I'm in. Get the downpipes, give him my car on Tuesday and when I get my car back it sounds like shit. I asked what the problem was and he said nothing, that's how it's supposed to sound with downpipes. I instantly called bullshit and was furious and demanded my money back. Wednesday I throw my car on the lift and check and see what could be the problem. All o2 sensors were connected, flange v-clamps looked ok from what I could see. The car spits and sputters, there is kinda old school- house buzzer sound coming from the engine when I turn it off and I pulled the codes and I got
10700(couldn't find)
29CD 10701 Misfire cylinder 1
29CE 10702 Misfire cylinder 2
29CF 10703 Misfire cylinder 3
29D9 10713 Misfire in case of tank filling low
11300(also couldn't find, but others are lambda so I'm assuming maybe o2 sensor)

Any suggestions on what the fuck he could have done?

dvs0690 · 06-23-2011, 06:24 PM

what kind of dp are they? when i had my titek dp installed i had a similar problem...my car sounded like a lawn mower and had the same house buzzer sound coming from the front...turns out the heat shield around the dp was loose and there was a gap between the dp and rest of exhaust....after they were tightened and adjusted the sound went away

Jeff@TopGearSolutions · 06-23-2011, 06:31 PM

Exhaust leak?

Adamteee · 06-23-2011, 06:32 PM

They're Macht Schnell. I didn't even think to look at that, but why would it still be doing it for like 5-6 seconds after my car is turned off? lol I'm more or less worried about the turbo's. The misfire is intermittent and normally occurs when the car is just sitting there/taking off.

Jeff, it sounds like there could be a small one, but I don't know if that's just the sound of downpipes. Where are you located in Jersey?

teek · 06-23-2011, 06:44 PM

Maybe he installed the o2 sensors in The wrong pipes? I' ve heard many a story of that producing similar problems. Or maybe if one of the sensors were damaged, they can be rather delicate.

cn555ic · 06-23-2011, 07:30 PM

I would think one of the o2 sensors are installed in the wrong slots...

moveswiftly · 06-23-2011, 08:11 PM

Quote:

Originally Posted by cn555ic

I would think one of the o2 sensors are installed in the wrong slots...

+1 since it is in cylinders 1,2,3 it must be a problem with one of the downpipes / possibly the o2 sensor there. Since the misfire is only on one side it is even possible the o2 sensor is damaged.

Adamteee · 06-23-2011, 08:15 PM

I'll kill him.

Brey335i · 06-23-2011, 08:34 PM

Probably damaged the O2 sensor like others have said....

vase330 · 06-23-2011, 09:23 PM

Quote:

Originally Posted by Adamteee

So here's the story, help would be appreciated and I checked the message board for a problem like this before to no avail. A guy approached me one day talking about how he loved 335's and I was like cool, we chat a bit and I mention I was getting downpipes. He tells me he was a BMW tech before joining the military and he'd put them on for me for a hundred bucks. I was like hell yeah, I'm in. Get the downpipes, give him my car on Tuesday and when I get my car back it sounds like shit. I asked what the problem was and he said nothing, that's how it's supposed to sound with downpipes. I instantly called bullshit and was furious and demanded my money back. Wednesday I throw my car on the lift and check and see what could be the problem. All o2 sensors were connected, flange v-clamps looked ok from what I could see. The car spits and sputters, there is kinda old school- house buzzer sound coming from the engine when I turn it off and I pulled the codes and I got
10700(couldn't find)
29CD 10701 Misfire cylinder 1
29CE 10702 Misfire cylinder 2
29CF 10703 Misfire cylinder 3
29D9 10713 Misfire in case of tank filling low
11300(also couldn't find, but others are lambda so I'm assuming maybe o2 sensor)

Any suggestions on what the fuck he could have done?

Wow that's cheap! Its a lot of work installing them right. Anyway hope you figure out what went wrong. Not too many things other than rubbing somewhere or touching can go wrong. Unless the wires got accidentally cut to the o2 sensor got cut, I can't see much else causing engine to go crazy.

UltraRacer13 · 06-23-2011, 09:37 PM

you got exactly what you paid for- a $100 downpipe install. you should not complain at all!

Naptime · 06-23-2011, 10:29 PM

Swap O2 sensors.

tibra1 · 06-23-2011, 10:32 PM

Quote:

Originally Posted by chesterfan1230

+1 since it is in cylinders 1,2,3 it must be a problem with one of the downpipes / possibly the o2 sensor there. Since the misfire is only on one side it is even possible the o2 sensor is damaged.

+1..doesnt sound like u gotta a deal at all

Adamteee · 06-24-2011, 06:15 PM

I hold other military members in a higher mindset and figure they'd act like the military ingrains in us. I got the car on a lift again today, noticed the rear o2 sensors looked like shit, one's wire was almost in half near the end of the connector so I figured that wasn't right and switched them around. Car runs better but still every once in a while has a 11300 code pop up and runs like crap for a few minutes then clears back up.
Also removed the 3 bolt heat shield and buzzing sound went away, but still has some on decel and I think it's the other heat shield, so I'll try and adjust the down pipe away from that and see if it clears that up too.
Thanks for all the advice!

06-23-2011, 06:17 PM	#1
Adamteee New Member 0 Rep 28 Posts Drives: 335i Join Date: Jul 2010 Location: Mcguire AFB, NJ iTrader: (0)	Downpipe install gone wrong. So here's the story, help would be appreciated and I checked the message board for a problem like this before to no avail. A guy approached me one day talking about how he loved 335's and I was like cool, we chat a bit and I mention I was getting downpipes. He tells me he was a BMW tech before joining the military and he'd put them on for me for a hundred bucks. I was like hell yeah, I'm in. Get the downpipes, give him my car on Tuesday and when I get my car back it sounds like shit. I asked what the problem was and he said nothing, that's how it's supposed to sound with downpipes. I instantly called bullshit and was furious and demanded my money back. Wednesday I throw my car on the lift and check and see what could be the problem. All o2 sensors were connected, flange v-clamps looked ok from what I could see. The car spits and sputters, there is kinda old school- house buzzer sound coming from the engine when I turn it off and I pulled the codes and I got 10700(couldn't find) 29CD 10701 Misfire cylinder 1 29CE 10702 Misfire cylinder 2 29CF 10703 Misfire cylinder 3 29D9 10713 Misfire in case of tank filling low 11300(also couldn't find, but others are lambda so I'm assuming maybe o2 sensor) Any suggestions on what the fuck he could have done?
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06-23-2011, 06:24 PM	#2
dvs0690 Whooo Whooo!!!! 15 Rep 195 Posts Drives: 72' Pinto, 73' Gremlin Join Date: Feb 2011 Location: Chino Hills, CA iTrader: (4)	what kind of dp are they? when i had my titek dp installed i had a similar problem...my car sounded like a lawn mower and had the same house buzzer sound coming from the front...turns out the heat shield around the dp was loose and there was a gap between the dp and rest of exhaust....after they were tightened and adjusted the sound went away __________________ 72' Ford Pinto - Turbocharged, Supercharged, NOS, Headers, Iceman cai, 5" exhaust tips, tornado gas saver, apc trunk wing, Underglow kit, cut stock springs, vtec badges, hid's in halogen housings, unpainted retrofitted civic buddyclub bodykit, vinyl graphics, chrome front fender vents, altezza taillights, autometer tachometer, fire extinguisher on passanger a-pillar, lambo doors, whistle tips
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06-23-2011, 06:31 PM	#3
Jeff@TopGearSolutions 3475 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Exhaust leak?
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06-23-2011, 06:32 PM	#4
Adamteee New Member 0 Rep 28 Posts Drives: 335i Join Date: Jul 2010 Location: Mcguire AFB, NJ iTrader: (0)	They're Macht Schnell. I didn't even think to look at that, but why would it still be doing it for like 5-6 seconds after my car is turned off? lol I'm more or less worried about the turbo's. The misfire is intermittent and normally occurs when the car is just sitting there/taking off. Jeff, it sounds like there could be a small one, but I don't know if that's just the sound of downpipes. Where are you located in Jersey?
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06-23-2011, 06:44 PM	#5
teek Private 1 Rep 55 Posts Drives: 07 e92 335i Join Date: Aug 2010 Location: MA iTrader: (4)	Maybe he installed the o2 sensors in The wrong pipes? I' ve heard many a story of that producing similar problems. Or maybe if one of the sensors were damaged, they can be rather delicate.
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06-23-2011, 07:30 PM	#6
cn555ic 482 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	I would think one of the o2 sensors are installed in the wrong slots...
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06-23-2011, 08:15 PM	#8
Adamteee New Member 0 Rep 28 Posts Drives: 335i Join Date: Jul 2010 Location: Mcguire AFB, NJ iTrader: (0)	I'll kill him.
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06-23-2011, 08:34 PM	#9
Brey335i Banned 120 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	Probably damaged the O2 sensor like others have said....
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06-23-2011, 09:37 PM	#11
UltraRacer13 Wannabe Track Rat 70 Rep 930 Posts Drives: 17 OG M2 Join Date: Mar 2010 Location: Texas iTrader: (1)	you got exactly what you paid for- a $100 downpipe install. you should not complain at all! __________________ 2017 OG M2 Last edited by UltraRacer13; 06-24-2011 at 02:55 AM..
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06-23-2011, 10:29 PM	#12
Naptime #Hashtag 10 Rep 245 Posts Drives: around in circles Join Date: Jan 2011 Location: South Texas iTrader: (1)	Swap O2 sensors.
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06-24-2011, 06:15 PM	#14
Adamteee New Member 0 Rep 28 Posts Drives: 335i Join Date: Jul 2010 Location: Mcguire AFB, NJ iTrader: (0)	I hold other military members in a higher mindset and figure they'd act like the military ingrains in us. I got the car on a lift again today, noticed the rear o2 sensors looked like shit, one's wire was almost in half near the end of the connector so I figured that wasn't right and switched them around. Car runs better but still every once in a while has a 11300 code pop up and runs like crap for a few minutes then clears back up. Also removed the 3 bolt heat shield and buzzing sound went away, but still has some on decel and I think it's the other heat shield, so I'll try and adjust the down pipe away from that and see if it clears that up too. Thanks for all the advice!
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