Exhaust fire?? Why?

[Mayday0017]

Got the 240 running again, found it was a bad design in the harness for that year 240 so it caused the fire. Got the harness out of a 93 didn't have the same fucked up jumper wire.... Anyways.... I"m shooting flames about 2 ft out when down shifting the car to slow down we have a good 20+ seconds of it on film... I don't have the BOV on right now and I don't think there is a stock Resirc valve on there uless it is built onto the stock intercooler somwhere don't know where it is locate or looks like. Also I am running really rich (barried in the red) when crusing but I start to run green and the car runs smooth under boost... What would be causing this? Want to get these problems fixed before the 240 meet in houston next weekend any suggestions? I'll post a video in the next few days when my friend uploads all of them to the net. I'm going to try my other hot pipe w/ BOV tomorrow and see what that changes. Tips suggestions welcome

[turbo2nr]

im asuming that u have no acat and a 3" turbo back, the free flowing exhaust will cause it to shoot flames. it may be the fact that you are running rich will cause the car to do that. i say try to lean it out.

1

[logik23]

Some people will say that since you aren't recirculating your BOV, the engine is dumping extra fuel in the engine which ends up coming out the back in a more fiery form.

[dontpurgethelines]

Yeah man, your best bet is to just lean it out

[nissanfanatic]

No, your best bet is to get a wideband O2 reading. Leaning it out without any kind of feedback on Air/Fuel ratios is one of the most ignorant decisions you can make. If anything, put it on the rollers.

Flaming with a VTA BOV is no big thing. Metered air is released while the fuel for that released air is dumped into the CC. Not much oxygen until it reaches the tailpipe so it slowly burns all the way down the exhaust system and suddenly gets a lot of oxygen. It will burn much quicker now. I had some leakage in my exhaust a while back. I also had a serious ignition problem so it would miss like crazy at about 2psi. In the midst of trying to discover what it was, I had this huge explosion sound from under my car. Sounded like a friggin 12 gauge went off under my car.lol I saw a big flash and was like "WTF???" hahahaha I just turned around and went home.