All,

Please accept my apologies if this is posted in the wrong section as this is my first time posting to this group. I am having issues on my 1993 RX-7 with my purge control opening very prematurely and it is preventing me from attaining anything over about 6lbs boost. Essentially, from the second I hit the gas hard enough to bring the boost pressure up from negative atmosphere into the positive boost range...you can hear a wooshing sound from the passenger side of the engine bay.



I have eliminated the possiblity that this is coming from any of the intake hoses or piping, and is definitely being vented by the purge control. The valve checks out when I run a vaccum check on it so the spring is fine. I also just pulled the entire rats nest out of the car (for the second time this year) to check all the solenoids and vaccum hoses. Every solenoid clicks and changes its airflow correctly when 12V is applied. Is there a particular resistance between the poles on a solenoid I should be checking (the workshop manual does not mention this).



The only other thing I can think is that this is something caused by a faulty TPS, or one of the other 100 sensors that the ECU uses to determine when to dump pressure. Any thoughts, ideas, suggestions? https://www.nopistons.com/forums/pub...IR#>/blink.png Im pretty stumped...



Please reply to me directly via email at : aaron@rinaca.com



-Aaron Rinaca

Well, the ECU uses the map sensor to determine manifold pressure and make adjustments accordingly. I would check that out next

ahhhh, i didnt even think of that. I will check it out and post what I find here(if anything). I just reinstalled the rats nest and solenoids.......car started right up first try with no leaks......still dumping pressure.......so it has to be a sensor somewhere telling it to do this. Thanks again for the insight

IF you here the boost leak then it is pretty big leak IMO. Check you couplers and big hoses for cracks. Also pull the wg/pc lines from the turbo and plugg them and see if the boost goes any higher. Watch out because it will send them soaring in boost.