Kzoodan
07-21-2012, 02:28 PM
This is my first post and have found this website to have ample amount of information about pretty much everything related to 240's. However I am having a couple issues with my BOV. First off the car is a 95 240sx se, with a red top s13 sr20det, it has a upgraded walbro 255 fuel pump, FMIC, T28 upgraded turbo, 3" exhaust all the way back, Isis bottom mount manifold, aluminum radiator, and Emusa coil overs. I acquired this car about a month ago and have fixing everything wrong that the previous own did. Here my new problem: I was having a problem with my BOV its a HSK SSQV V2 (yes a real one) (and as far as i know this is the only one without adjustment) when reving the car in neutral or boosting in gear i wasn't hearing my BOV instead i was hearing compressor surge (sounded like multiple sequential blow off's and the sound seemed to come from the air filter. After doing research i found out that my BOV spring was set to high and not venting, i found this thread (DIY hks bov fix - MotoIQ - MotoIQ - Forums - Technical Area, motoIQ is about geeks and for geeks, here ya go, a geeks playground - Maintenance, Repairs, DIY, Low Buck Mods (http://www.motoiq.com/forum/aff/16/aft/96/afv/topic.aspx)) about adjusting your spring. i went ahead and bought the 2" sprinkler head and used the spring. Now when i rev the engine in neutral and it hits around 1-2psi the BOV opens, however when driving the bov only opens when i hit max boost around 7-8pis but doesn't open for and boost between 1-6psi. This has me wondering what is going on? Oh also i have the BOV T'ed into the vacuum line off of the throttle body, it is T'ed off between my boost gauge and controller (is this a problem?)
I plan on buying another spring and cutting one to see if i can get better result.
1. Could this symptom be caused from a boost leak i can't find?
2. why does the BOV open at 1-2psi in neutral but not 1-6psi when in gear and driving?
3. Is my BOV broken?
4. I apologize now if this seems like a dumb question but when i rev my engine in neutral and before i hit boost around -5psi i still hear a faint compressor surge (i think) should the BOV open to stop this noise? In other words does a BOV open when not in boost but above the normal -21psi at idle?
This is my first post and i am sorry i if it has been put in the wrong place, or if i have broken any of the forum rules. If i can supply any more information let me know! i can take pics or vids of any of the problems if need.
thank you very much for your time in reading/resolving my problem
Dan
I plan on buying another spring and cutting one to see if i can get better result.
1. Could this symptom be caused from a boost leak i can't find?
2. why does the BOV open at 1-2psi in neutral but not 1-6psi when in gear and driving?
3. Is my BOV broken?
4. I apologize now if this seems like a dumb question but when i rev my engine in neutral and before i hit boost around -5psi i still hear a faint compressor surge (i think) should the BOV open to stop this noise? In other words does a BOV open when not in boost but above the normal -21psi at idle?
This is my first post and i am sorry i if it has been put in the wrong place, or if i have broken any of the forum rules. If i can supply any more information let me know! i can take pics or vids of any of the problems if need.
thank you very much for your time in reading/resolving my problem
Dan