quick question. i am only getting 5psi and there is a really loud whistling sound coming from the turbos. when i floor it 5 spi comes quick and it just stays there. the car has a dp and a box type intake. where does the bottom nipple from the greddy bov go? the o2 sensor is bad but i dont think that has anything to do with it. my check valves are ok. i need this fixed by tomorrow. thanks.

 

Not what I would consider an URGENT matter, but my guess is you blew out the coupler betweeen the y-pipe and the uper intercooler inlet pipe. Take off the couple and check it out

 

sounds like your double throttle won't disengage

but the whistling sounds like you have a boost leak, plug the bottom nipple maybe?

 

it is urgent because i am selling the car!!

 

listen to this!
P'cola FD just shared this with me. Take off the air filters going to your 2 intakes and plug them up with tenis *****. Then take an air compressor and shoot air where the boost gauge hooks up to the uim (passenger side in the middle) Now the air has nowhere to go except for where the leak is!

do this while the car is off obviously and just listen or feel around for leaks.

 

damn good idea. is it ok to shoot that damp air down there?

 

I'd crawl under the car and make sure your wastegate actuator arm is still positioned properly--on my Dad's R1, the small horseshoe clip had come off and his watergate was jammed in the full open position. Of course, the whistling sound would point to an IC pipe coupler or something similar, but it's worth a check.

 

it's not a horseshoe clip, it's an E clip, they have them labeled as that at pep boys

 

Whatever floats yer boat. The little suckers look like horseshoes.....if someone told me to find the E clips in my engine bay, I'd tell 'em to fock off

btw, I meant "wastegate" up above.....dunno about any watergate

 

i will check that. thanks for the help.---j

 

What kind of issues would there be if the Double throttle was not opening right?

 

What kind of issues would there be if the Double throttle was not opening right?

 

What is the result of the only getting 5 psi. I recently did the non sequential conversion and my car hasnt boosted past 5 psi ever. It used to boost .8 to .9 bars !!! Any insight?

 

bump

 

I've had this problem. In my case, it was a boost leak. The IC pipe between the bottom end tank and the crossover pipe. This was on the stock corrugated rubber .... you couldn't see the leak unless you squeezed on it, and voila ... big ol' crack right down the middle. I'd start at the IC piping and work your way back. Odds are it's something small.

 

I have had the same boost problem before too. Mine wouldn't go about 6 psi. I have a Power FC and even when i tuned it it wouldn't work right. I then bought my ATR Midpipe and it started boosting strongly at 10.5-11 psi right when I installed it. I don't exactly know why but one person told me it would have been a problem with my stock cat.

 

I had the same problem once and had no idea what it was. I changed out my cat. for a midpipe just as my next mod and it ended up that it fixed the boost. I asked a mechanic and he said that my cat was clogged and thats why. I just read this on another thread too. Heres the link.

https://www.rx7club.com/forum/showth...hreadid=158818

 

That link helps with good info but, I accually get a full 10psi on the primary but only 5psi on the secondary(10-8-5).Also my vacuum is reading 16 at idle. My car is 100% stock with 67K original miles, vacuum lines, and pre-cat. I currently have a down pipe waiting to go in as soon as I fix my boost problem. Any ideas?

 

The original vacuum lines might be your problem. Can you hear the boost escaping when you're flooring it on the 2nd turbo?

 

Can't really tell! Is it better to listen with the windows up or down? Also when I'm under the hood with the car idleing, I'll rotate the throttle, and you can see the intercooler pipes expand while reving up and contracting while reving down. So it would appear that my pipes are ok right? I'm thinking about trying the tennis ball method.

 

Well I installed the downpipe today. Wow those turbos really sing now, but my boost is still a little down. Now instead of only getting 5psi on the second turbo, I am now getting 6-7 psi. It tries to go higher but flucuates between those two numbers. Any advise?

 

Check out all your vacuum lines. I had the same problem with my setup when I had the twins. A vacuum line was dry rotted and split and was keeping the secondary turbo from kicking in. I believe it was the vacuum line going to the wasgate for the secondary turbo. It's been a while. You can see and get to it without removing anything. I would get full 10psi until the transition point and then only get 5psi from there. Is this what you are seeing?

 

Yes it is! I currently do not have a shop manuel but, I do have a vacuum hose diagram sheet. Is the vacuum hose you speek of the one that goes to the Acuator(wastegate control)?

 

I'm pretty sure that is the one. Check it out and see if it needs replacing. Mine was pretty obvious. You might have to just try replacing yours. Let me know if that was the problem.

 

Will do! Now I have another problem. Ever since I put in the down pipe, my clutch is starting to slip. I guess I'll be doing a full vac job when I pull the engine to replace the clutch. YaY