I changed 3 out of the 4 check valves today and swapped out the charge relief valve and the bov with used ones also. I still have the same problem. i changed the 3 check valves that are by the pressure tank. the one under the uim I didn't change I was told that it would not cause boost problems. And I had a venting hose to the crv that was cracked I got a new one. Any Ideas on what else I should check?

 

Did you even test any of the solenoids on the rack?

 

no i didnt. how do I check them?

 

Ok, let's start first with the issues with the car. If you do a pull from 3rd gear, what does the boost pattern look like? What happens to the car and at what rpm does it happen?

 

well pretty much if i hit 5 lbs or higher boost it falls on its face. and if i keep it at under 5 lbs boost like at around 3 or 4 it will go fine until i am around 3 rpms it will start hessitating pretty bad.

 

You have verified you have no ECU codes?

Most likely, either the car is going into limp mode, or you have an issue with your ignition or fuel system. Have you thought about taking your car to: http://www.a-spectuning.com/ ?

 

no i have not verified that I have no ecu codes. How can I verify that? I have no check engine light that comes on. As long as I dont make the car boost high it will go to red line no problem. And I was also wondering on how I can reset the ecu?

 

I'm not trying to be an *** or anything, but those are basic things you can easily find out by using the forum and the Factory Service Manual (which is available as a download).


Use the FAQ thread as it has links to most of your questions:
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/faq-3rd-gen-other-useful-links-68640/

Download the FSM (Factory Service Manual):
https://www.rx7club.com/3rd-gen-archives-73/tech-manual-directory-614824/

There are troubleshooting guides in the FSM. Lastly, use and search the 3rd Gen section:

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/

You have a 3rd Gen RX7, that's where you should be looking for information.

 

I pulled the codes by using the diagnostics box it gave me 2 codes 23 and 51. that is the fuel thermosensor and the fuel pump relay. So should I get new sensors or used? what would be my best step in this situation?

 

Us the FSM. Page F-110 has procedures for testing the Fuel Pump Relay.

Page F-40 has steps for the Fuel Thermosensor.

 

my car wouldnt do past 5 pounds once and it was the cat it calapsed and failed on me

 

His problem is that he has two codes which both will throw the car into limp mode.

 

I have a straight pipe. So that cat wouldn't be my problem. But about the limp mode after my car falls on its face right afterwards the exhuast tone kinda changes for a sec and response in acceleration is a lot less so I think that is the limp mode. I am gonna bring a multi meter from school tommorrow and test the two sensors.

 

Can anyone tell me exactly what the fuel thermosensor and the fuel pump relay do? I have an idea but I want to be sure!

 

My car wont boost beyond 0.2bar. Everything seems fine, rats nest re piped. Reaches 0.2 wont go higher, at 4600rpm the big turbo comes on, takes the 0.2 but no rise in boost at all. No dips. Anybody got any ideas??