brown smoke from exhaust 2003 g35 sedan
brown smoke from exhaust 2003 g35 sedan
Ok well I have done a search and I'm thinking maybe it's oil but my engine is only at about 77,000 miles. I noticed the brownish smoke again today as I floored it from a dead stop. It only seems to happen when I start off. I never see any when I'm changing gears (manual mode). I have modifications and I have even had my ECU reprogrammed. Now I am supposed to use at least 92octane fuel but in CA they sell 91. So I have been using different octane boosters to see which one works best. I was thinking that maybe that is the reason too. Any ideas about what this is would be a great help. Thanks.
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bullittandy
- Posts: 1415
- Joined: Thu Jul 21, 2005 4:57 pm
- Car: 2003 Infiniti Q45 70K miles
1999 Infiniti Q45 Touring 180K miles
1997 Infiniti Q45 270K miles (sold)
1997 Infiniti Q45 186K miles (junk-sold) - Location: Atlanta
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Re: brown smoke from exhaust 2003 g35 sedan (pae9132)
Sounds rich, take it to a emissions place and have them do a tailpipe sniffer, then you'll know.
Re: brown smoke from exhaust 2003 g35 sedan (bullittandy)
Thanks. I'll have it checked out
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ScottJackson
- Posts: 657
- Joined: Fri Mar 26, 2004 6:08 pm
- Car: 91 Q45, 92 Q45a, 93 Q45, 79 BMW 635CSi, 95 BMW 540i
hopefully you haven't been using any leaded octane boosters or leaded Av. gas. That's not good for O2 sensors and cat converters. I agree, running rich. And octane boosters are junk. Buy a burger or some candy instead with the $3. If the octane booster says it raises octane 4 points, that'll take you from 91 octane to 91.4... maybe. If it's supposed to have 92 octane, 91 should be fine. If you hear it ping under load, then see about getting some better gas than 91 pump.
WAIT! I just read through your "mods" list. Some are OK, some are garbage. That ground wire kit is total B.S. I'm not trying to be mean, just saying it's a waste of time/effort/money. That Hyper Gauss fuel tuner is just added weight to your car. Take it off and use it for a refrigerator magnet. If you must have an aftermarket plenum, the APS ones are supposed to be decent. It takes time and lots of reading to sort out the hype products designed to suck your wallet dry and the actual good performance parts. Fact is, any "simple" or "easy" bolt-on mod is almost always a downgrade from the factory stuff with these newer engines. Yes, you can make more power than stock with modifications, but after a small bump in power with a good computer program, you've got to get into the big world of nitrous, strokers, cams, or forced induction to get real world gains. Again, I'm not trying to be harsh, just trying to give you a heads-up. Oh yes, if you drive in dusty/dirty conditions at all, make sure your air filter is up to the task. The stock paper filter is great for getting cool, clean air to your engine. It's also got plenty of surface area to flow all the air your engine wants. K&N and other similar filters rarely filter fine dust worth a cr@p. This means greatly reduced engine life.
I also don't consider a radiator cap a modification, no matter what name is on it. Just doing a little browsing on ebay and I see what appear to be generic replacement radiator caps for the 350z that have an "ARC" sticker on top selling for $28 each. Man, I gotta get into selling "tuner" car parts while the iron's hot!
Modified by ScottJackson at 8:59 AM 9/14/2007
WAIT! I just read through your "mods" list. Some are OK, some are garbage. That ground wire kit is total B.S. I'm not trying to be mean, just saying it's a waste of time/effort/money. That Hyper Gauss fuel tuner is just added weight to your car. Take it off and use it for a refrigerator magnet. If you must have an aftermarket plenum, the APS ones are supposed to be decent. It takes time and lots of reading to sort out the hype products designed to suck your wallet dry and the actual good performance parts. Fact is, any "simple" or "easy" bolt-on mod is almost always a downgrade from the factory stuff with these newer engines. Yes, you can make more power than stock with modifications, but after a small bump in power with a good computer program, you've got to get into the big world of nitrous, strokers, cams, or forced induction to get real world gains. Again, I'm not trying to be harsh, just trying to give you a heads-up. Oh yes, if you drive in dusty/dirty conditions at all, make sure your air filter is up to the task. The stock paper filter is great for getting cool, clean air to your engine. It's also got plenty of surface area to flow all the air your engine wants. K&N and other similar filters rarely filter fine dust worth a cr@p. This means greatly reduced engine life.
I also don't consider a radiator cap a modification, no matter what name is on it. Just doing a little browsing on ebay and I see what appear to be generic replacement radiator caps for the 350z that have an "ARC" sticker on top selling for $28 each. Man, I gotta get into selling "tuner" car parts while the iron's hot!
Modified by ScottJackson at 8:59 AM 9/14/2007
Re: (ScottJackson)
so true. It's funny how the smallest things can make the smallest differencees. I also feel sorry for some people who are persuaded by just the power of suggestion. So many items out there are just b.s. Just do your home work and you'll never buy another bs product.