91 240sx hb ca18det

[mr.dat1]

new thread up

http://zilvia.net/f/showthread.php?t=494330&referrerid=110710

[xh3nry]

Would you part wheels and 5 lug conversion?

[mr.dat1]

naa sorry no parting out

[mr.dat1]

Bump ttt !!!

[s13mikesr20]

if parting out i call motor set up for my ae86 ohhhh yea

[mr.dat1]

BUMP !!! if anyone here is a mechanic and can help me figure out whats wrong or point me in the right direction I'd appreciate it :) video shows problem im having starts right up no problem and idles perfect at around 9k no misfiring or anything but excess air if blowing out the intake not bov ... was told it could be timing but i havent even touched the cas or revoved any timing components so idk if that could be it

[Spencer dougherty]

no sound on this comp.. ill check it when i get home and let u know

[mr.dat1]

no sound on this comp.. ill check it when i get home and let u know

thanx so much any help would be awesome i am lost :/
if you guys need any more video or pics of anything dont hesitate to just ask

[Captain!]

Are you talking about the fluttering sound? Sounds like your blowoff valve isn't adjusted right. The synapse bov is designed to stay open at idle and low engine load, but it looks like you are still using the maf. This means that the previous owner instead of plumbing the bov to the intake pipe just cranked the synapse bov down so it wouldn't open at idle. This means it doesn't relieve the excess pressure at low boost. So what is happening is instead of the extra air going through the bov it is instead working its way back through the turbo. This is called compressor surge, not a good thing as it damages the turbo over time. So here is how to fix it, get a fitting welded onto the intake tube before the turbo, but after the maf sensor (if there is already one there from the factory skip this step). Once you have this put a hose on from the bov to the new fitting (I believe synapse has a 1.25 inch outlet). Next loosen the nut on the back of the bov to get it to function properly. A synapse bov has 2 air fittings on it, BOTH must be connected to the vacuum line (you can use a t fitting).

Your other option is to get the kit from synapse that stops it from opening at low load conditions or use a different bov. Be warned though if you just loosen the nut it probably idle like shit if it even runs at all. The reason synapse designed the bov this way is to increase engine response when the turbo isn't spooled. A really cool feature, but unfortunately a lot of people do what you see on your car.

Good luck