When I bought the car I was told it was boosting 5psi, he stated he brought it to Pettit and they informed him. He said they didn't have time to put it back to 10psi but has no clue how or why they did it.

The car is almost stock except crappy intake, and 160 switch as far as I can tell. I took the lines off and verified the restrictor pills are in here, I also suspected the cat to be clogged. Today I had a mid pipe put in and it is still boosting 6 psi, although it feels like it is a bit quicker than before that could just be me.

I had a boost and water temp gauge installed and boost goes up to 6psi and water temp stays at 180 in any driving. There is no boost controller, stock ecu and pills, does anyone have a reason I would only be getting 6psi?

I checked for leaks and also had dragon motorsports check it, didn't find any but something might have been over looked. My vacuum when warm is sitting right around 15 and around 17-18 when cold. Any information would be helpful or any thing else to check.

I am going to call Pettit also to see if they remember anything about it, the car runs good and pulls good just not where it is supposed to be.

Thanks
Gary

 

I know you said you did it but Boost leak? Check all the couplers or see if you can build a pressure tester.

http://www.wonderhowto.com/how-to-ma...bo-car-265302/

 

Boost leak, broken crv or bov, bad solenoid. Could be a million things. Try checking for boost leaks and vacuum leaks.

 

seems like u dont have secondary boost?

 

It is transitioning fine, just not boosting to full and it builds boost pretty quick. I am at the 6psi between 2-2.5k rpm and it is staying there without the gauge jumping around except during transition.

 

Basically sounds like you are just running off the waste gate springs.

http://www.autosportracetech.com/RX-...leshooting.htm

 

Thank you very much I will be checking that tomorrow, need to study for my final today.

 

By 'almost stock', you must mean sequential.

Replace your one way valves/lines going into your pressure box behind the alternator. I'd put money on it.

 

Yes sequential, I could be wrong but today after the mid pipe was installed it seemed to jump every once in awhile. This was while not in boost, probably in my head, I am gonna start to check some stuff tomorrow. I hope it isn't down long, hate driving my DD a rustang.

 

Haven't had much time to get to the bottom of the problem, yesterday I took the UIM off to change my intake temp sensor (was pulling a code 11 and running really bad and dropping in RPMs at a stop and smoking). In the process I broke a check valve, today I put the new check valve and took it for a drive. All problems cleared up except the boost, while I had the UIM off I noticed that a hose wasn't there, I am sure it is just emissions but could anyone confirm? I have the diagram but I don't trust myself.

 

Interested to see what you find out, mine is boosting at 7psi the entire time.

 

I know why mine is just haven't lifted it to get to the rod. The butterfly to the turbos was adjusted and does not fully close. Mine was set like this and can easily be fixed. If yours just started doing it for no reason it is most likely a different problem.

 

I bought the car that way, I plan on checking the rods and probably replace all the vacuum line, will see if that fixes the problem, thanks!

 

I figured out the problem, had a few vacuum lines not hooked up. Namely the wastegate control and turbo precontrol. Hooked it all up today and it boosted to 12psi in primary and spiked to 14psi on the secondary. Thank god I installed the Pettit ECU before fixing the problem. Now I need to restrict the exhaust some and put my boost controller in. I have to say the difference between 7psi and 12psi is just insane, I didn't get to much in it today because it rained earlier just tested 2nd gear to see where boost was. My wife is going to HATE the car now as she was already scared by it at 7psi.

 

The restrictor plate in the exhaust will still allow boost creep. I did that, but would never waste my time with that again.

Do it right and yank off the turbos. Take the exhaust manifold apart and port the wastegate. Way better than restricting power/response/heat and still getting boost creep. The process seems like a chore, but it really isn't that bad.

Props to Rxtacy for nailing the problem.

Good Luck!

 

Hahaha my wife always closes her eyes, one hand over eyes, one hand on the 'o ****' handle.

This is when I'm going about 40 mph. Apparently 40 mph in the RX7 is faster than 40 mph in her CRV.

 

This right here makes me thing it's the tubo pre-control solenoid. While attempting to diagnose my boost issue one of our trouble-shooting steps was to unplug the turbo pre-control solenoid.

When this was unplugged my primary turbo would not boost more than 6psi but the secondary would kick in fine.

This would lead me to believe your pre-control is not functioning properly.

-Geoff

 

Already fixed the problem, both wastegate and precontrol were not hooked up.

 

Glad you were able to get her fixed.

Being low to the ground does give you more of feeling of speed, but c'mon 40 mph?