Well I have been having some boost problems, sucks because I miss the feeling of my car when it was boosting properly. I have had to turn down a Z28 and a GT because of boost problems; it really sucked because I know I could have handed them their asses. Moving on, I got time to do a WOT test on the highway so I figured what the hell lets see what results this brings. So I start off and it boosts strong for about a few seconds and then starts to drop off reasonably fast. Probably takes about 2 seconds to drop to about 5psi where it stays until redline. Any input as to what is causing this would be appreciated.

 

do the 10-8-10 boost test. sounds like you have a leak related with your secondary turbo

 

start by checking the coupling to your ypipe..if your building boost initially and it drops, sound like a secondary problem..your gonna need to start checking vacuum lines, solenoids relative to secondary turbo operation...

 

Yeah I did the WOT test. My car should be getting 12-10-12 but obviously it isn't. And I am pretty much positive it’s my secondary not coming online that is causing the low boost. I am just hoping it’s not my secondary turbo being shot that’s causing the problem.

 

stock normal boost pattern is 10-8-10...testing is best done on a third gear pull..check the pressure tank..

 

My car has a DP, Blitz SMIC, cat-back and intake with M2 stage 3 ECU so I think its safe to run the 12-10-12. Although I really would like some input as to WTF is causing my boost problem. I don’t think my secondary is shot but I am not certain. What do you guys think?

 

Charge Relief Valve stuck open?

 

once again, i'm posting this thread cuz it owns so much:

https://www.rx7club.com/forum/showth...light=3rd+gear

technovoice rulez!!

 

Did you solve the problem? What the hell was it? Does anybody follow up on this forum? Anyone? Anyone?? Sorry, it's just that I'm sittin here searching thourgh the forum, but no one ever follows through. They never come back to say if the problem was solved. Come on people! Follow through.

 

Well ive got the EXACT same problem....it will hit like 10 or so...then drop to about a steady 5 til redline...pisses me off REALLY bad because i was trying to impress this girl that loves rx-7's the other night. Well i hit it and it was sweet then it dropped to 5....and it did that all night. It's always done that but i was just hopeng that it would not do it with her in the car...hahaha anyway If anyone has this problem and fixes it i would love to know how.....i just dont have money right now to buy things to see if they will fix it nor the knowhow on rotaries.