Searched and searched so dont start!! About 120 miles ago I put on cheap Resonated test pipes with double non-foulers installed. Test pipes are nice quality stainless with beautiful welds. Im using my stock y-pipe and a Knock off Nismo Exhaust from a local place called ZFever.

Only other mods are MD 5.16 spacer with CCV.


Car never smoked a day in all its 56,000 miles, ran perfect. After test pipes installed I was expecting a stinky mess but not a smoking mess. I rode with my friends to a car show today and they all made me follow the whole crowd because I was smoking whenever I got on it.

SMoke is white and only happens when I accelerate. The harder I hit it the more smoke u get. Smoke doesnt smell sweet just smells more like gas and is def WHITE. The smoke is not THAT bad but its definelty noticeable. WHen I rolled up at the car show people were yelling SHUT THAT **** OFF!! lol!

Is the car running to rich??? ALso I havent gotton ANY CEL or any lights. ALso I did a ECU reset and nothing changed. I figured it was the pipes buring off stuff but it still hasnt gone away at all.

Im a mechanic and I work on boats but Nissan engines confuse me to hell. My best diagnosis is that its running rich and needs to be leaned out. But im no nissan mechanic by far.

Im on the verge of getting a UPREV mail order flash, do u think that will fix it because they will adjust the AF??

Thanks guys! -chris-

 

Test pipes don't cause smoke. And catelitic converters do not eliminate smoke.

Since you work on water cooled engines, you already know one possible problem.

Another is the fuel injectors. Bad fuel injectors will cause pillows of white smoke.

 

My friend had an used 350z and once heput on test pipes it started to smoke white too. Found out his motor was going bad and had to be replaced. Fortunately it was under warranty and dealer put a newmotor in.

 

If we all get a vote, mine is that you are passing oil. When you reduced back pressure that was all the help the oil needed to find it's way out into your pipes.

 

But burnt oil is black, not white. ALso the cars oil level is perfect and never changes. Also so is the coolant level.

 

probably just the test pipes. does it smoke when you first start it up or after it has warmed up??? Test pipes usually smoke for the first few hundred miles when they are new.

The gas smell is normal as you have no cats

 

Oil doesn't always burn black (or blue), and you say the oil and colant levels are both good. If you had a gasket/head issue it would be losing water and possibly fouling the oil into a white paste...but you don't see signs of that (full water level) so it is again more likely that a tiny bit of oil is getting into your cumbustion chamber. The internal moving parts cannot have an airtight fit, the air pressure provided by backpressure is typically enough to stop oil from passing through (path of least resistence) but you removed the backpressure, hence a tiny oil burn.

 

I have to do a real test if it smokes with its first started up, I was hoping its the test pipes burning something off. If parked with no wind and I rev it high to like 5k+ it will leave a mini-cloud of thin whit smoke behind the car and it stinks like something burning.

So if it only smokes when its warmed up does that mean something is burning off the test pipes??

Thanks for all the quick replys guys

 

metals expand in heat, different metals expand at different rates. the gap allowing the leak can get bigger or smaller depending on what parts are growing faster when heating.

 

Check your oil dipstick..... When i changed my test pipes i accidentally pulled it out and didn't notice. When i took it for a test drive it would smoke every time i pushed it. Check to see if it's been leaking, when i checked there was oil all over the place including the test pipe which was burning it, causing the white smoke.

 

How did u accidently pull out the dipstick changing the test pipes? So it was leaking down the side of the engine?

 

It wasn't completely pulled out..... It wasn't plugged in all the way. It was in but the rubber plug at the base wasn't pushed in. And yea, the oil was spewing all over the place. I plugged it back in and the smoke stopped, maybe thats causing your smoke too

 

there may be confusion between the dipstick and the dipstick holding tube, I think you mean the tube, the OP may think you mean the stick.

 

No i mean the actual dip stick, You know how it has the rubber seal that plugs in, it wasn't pushed in all the way causing oil to leak when i accelerated.

 

My understanding is that gas is black smoke, oil is blue smoke, and white smoke is coolant/water.

 

Well just checked it on a cold start up and no smoke... THen drove to the gas station and checked it after it was warmer and still no smoke.

Im thinking it doesnt smoke untill its really hott. Could this mean that the test pipes are whats smoking when the car is HOTT HOTT??

 

TESTPIPES DON'T SMOKE! You can get a little burn-off from the mandrel grease - but that goes away after about 5-10 miles of driving.

You likely have an engine issue - but there are things to check. Are you getting a CEL? If so, what's the code. Check your PCV valve and other vacuum lines - could be simple like that. How does the car run? If it runs fine, doesn't et hot, doesn't drip underneath, etc, mileage is still all good...you could could have a small water leak internally.

What does the smoke smell like?

Rick

 

My friends car they diagnoised that he had a bad ring seal causing oil to burn. And the smoke was white. just check your oil here and there and make sure its nothing with burning oils.

 

Maybe the resonator section of the test pipe is failing already?

TK

 

I had the same issue when I put on test pipes.

Turns out I had a bad motor that was burning a quart of oil every 500 miles, and it did not smoke with the stock cats. I got my entire motor replaced under warranty. Like others have said, it was a bad exhaust valve seal.

Only way to really find out where the smoke it coming from is to take off the test pipes and let the car run. If the smoke is coing out of the headers than you have a bigger problem, if not then get some better test pipes. My car smoked like crazy at idle and under light throttle, but would go away at WOT, and it was white. When I put the stock cats back to take it to the dealer it wasnt smoking. They did a oil consumption test and shortly after replaced the motor.

It is possible that theres condensation trapped in the resonator, which would cause some white smoke like at startup.