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01-16-2014, 12:37 PM | #1 |
Scooby Newbie
Member#: 256863
Join Date: Sep 2010
Location: Colorado
Vehicle:2011 STI HATCH DGM |
Is it safe to use a fog machine (Halloween) to test Downpipe leak?
I was trying to find a local store with a smoke generator to test for leaks on my downpipe. But didnt find any luck. I have a fog machine from halloween, but was not sure if its save to use that to test for leaks in my downpipe. My downpipe is completely removed and i had it re-welded because it literally cracked in HALF! so i got it re-welded and just wanted to test it before i put it back on. Its obviously gonna be hard to tell for small leaks when i install everything back on and drive it. As long as my downpipe doesnt leak does this mean that i should be able to get full power back on my car? I found out that my downpipe cracked when my car was only pulling 9psi on high boost. When i normally get 16 psi on sport mode. So i just want to make sure that nothing else in the downpipe (even if it doesnt leak) can cause my car to lose power. Like maybe if the catalytic converter getting damaged? < im noob. My understanding the the catalytic convert is just to reduce the pollution kinda stuff, and has nothing to do with power. So please let me know. Thanks for reading!
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01-16-2014, 12:41 PM | #2 |
Scooby Newbie
Member#: 256863
Join Date: Sep 2010
Location: Colorado
Vehicle:2011 STI HATCH DGM |
PS: would you recommend to heat wrap the downpipe? The conditions in colorado gets really cold one day then hot. or maybe snow one day and be 70 degrees next day. My understanding from research is that when you heat wrap the downpipe it doesnt last as long because the water moistures get trapped and it corrodes. Although there are some heat wraps that does not trap water inside. I am not heat wrapping my downpipe to get more power, i am heat wrapping my downpipe because i somewhat believe it will prevent it from cracking again because the metal is not full exposed or maybe prevent it from leaking because its wrapped?
And thanks again! |
01-16-2014, 03:23 PM | #3 |
Scooby Guru
Member#: 103232
Join Date: Dec 2005
Chapter/Region:
Tri-State
Location: GTX3576R 05GD, GTX3076R'd FXT
Vehicle:GTX 3071R'd 11WRX PPG,4.44,LSD,E85,6spdx3 |
Yes its safe. Whats normally used it like baby oil. I normally pull the fuelpump/ignition fuse and crank it over a few times. Cranking it over without the car starting will pump everything out...
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01-16-2014, 03:26 PM | #4 |
Scooby Guru
Member#: 79643
Join Date: Jan 2005
Chapter/Region:
NESIC
Location: The internet
Vehicle:2021 STI TE Terminal black pearl |
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01-16-2014, 03:30 PM | #5 |
Scooby Specialist
Member#: 179573
Join Date: May 2008
Chapter/Region:
South East
Location: South Florida
Vehicle:2002 MBP Bugeye Flip Flop Tuned on corn |
A downpipe leak shouldn't be affecting anything...
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01-16-2014, 03:41 PM | #6 |
Scooby Guru
Member#: 103232
Join Date: Dec 2005
Chapter/Region:
Tri-State
Location: GTX3576R 05GD, GTX3076R'd FXT
Vehicle:GTX 3071R'd 11WRX PPG,4.44,LSD,E85,6spdx3 |
Oh really? Well I guess that all depends on where your wideband is located. Or if you plan to have the car dyno tune in which we normally take the reading for the tailpipe. In this case the last thing you want is a leak. Not only will it push exhaust out but it will pull air in. This will throw off the sensors reading. also the air being introduced to the system will ignite un burnt fuel making for massive exhaust temp spikes. These EGT spike kills sensors fast...
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01-16-2014, 04:14 PM | #7 | |
Scooby Newbie
Member#: 256863
Join Date: Sep 2010
Location: Colorado
Vehicle:2011 STI HATCH DGM |
This sounds scary, because my CEL also came on, and thats why i found out that my downpipe was cracked. I had the CEL come up for the 02 sensor. I just thought that because the downpipe was literally cracked in half (all around, the downpipe was in two pieces) was what threw my CEL on? I hope i dont need to replace 02 sensor as it is not cheap! I also figured that see my downpipe the way it was, should have explained why i was running low boost? My car felt like a stock impreza. I tried to slam on the pedal and its hardly even pulls. Do you think that fixing this downpipe will fix my boost problem? as it only has occured around same time when CEL started coming on and when i saw the crack on dp. Thanks for all the comments ppl
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