RX7 FD3S Sequential Turbo vacuum Rats Nest and Fuel Injector Restoration

Restoring the Vacuum rats nest in a Twin Turbo FD RX7 to assure continued proper sequential turbo operation and reliability.
This is considered general maintenance due to the age and the effect the heat has on the factory rubber vacuum lines and solenoids under the intake manifold.
RX7's are also known for the Fuel Pulsation Dampener starting to leak over time which has contributed to many engine fires and should be replaced as a maintenance item. Some decide to remove this altogether, as I am keeping this car near stock, I am putting my faith in the Mazda engineers and keeping it. They chose to have it part of the system for a reason.
Fuel injectors were removed and professionally cleaned and tested as well, an inexpensive peace of mind and part of making sure everything operates as it should.
Shout out to ‪@BoostLab‬ and ‪@jp3motorsports542‬
For Sequential Turbo Diagnosing, ‪@rx7bruh‬ made a great video explaining here • FD RX-7 Sequential Tur...
Also note what I called the Vacuum chamber is actually the pressure chamber, the vacuum chamber is located behind the power steering pump and does not need to be removed but there is a vacuum hose that goes to it that should be replaced as well.

[@scotty305]

Very nice. Thanks for posting the video showing the tachometer and boost gauge near the end of the video.

[@sasukekiller420]

Thank you for the video I appreciate it.

[@klmelj]

Great Job. Have a bad full leak. I have already taken everything out but man this would have been better! I am replacing a hoses belts I can while I have everything out. Again great job!

[@touchedbyawankel]

Smart. It is always a good idea to replace everything you can while you are that far in. Sometimes I forget just how old these cars really are. They were almost brand new when I first started working on and driving them so when I see good condition cars I still picture them being new in my head. I was still impressed with the condition of my fuel lines but I still replaced them.

[@klmelj]

@@touchedbyawankelthanks. I just priced everything 😢. I was as careful as I could with the wiring harness but had three security clips break on some of the harness wire connections. Have you had that happen and what was your solution?

[@touchedbyawankel]

@@klmelj I did not but this is typical a lot of the time, especially on the higher mileage cars. The heat really gets to the plastic. You can buy the replacement connectors and either repin or cut and solder or crimp new wires. Do a search for Replacement FD3S connectors and you will see plenty of offerings.

[@klmelj]

@@touchedbyawankel thanks 🙏. Yeah my car is 100k+ club.

[@legkick5]

Great video , appreciate all info provide.

[@touchedbyawankel]

I'm happy to help the community where I can. Knowledge of these things isn't very widespread which is one reason so many people just ditch the sequentials and go single turbo

[@gav240z]

Nice video, I've done a lot of this work and messed around in the rat's nest. I've got mine apart for a rebuild at the moment. Going to high flow the twins and try keep it OEM+ so this is a useful guide for me. Looks like you're driving in Australia? But have an American accent?

[@touchedbyawankel]

I'm actually in America. What twins are you going with? I've heard good things about the SP twins but I don't know anybody here that runs them. Our best choice here are BNR twins or 99 spec

[@odin255]

@@touchedbyawankel check out RX7 FD Specialist and look up the twin turbo he does,

[@touchedbyawankel]

@@odin255 I believe he uses the SP twins. I plan on getting the Aussie SMIC he makes as well. Probably the best Stock mount intercooler on the market at this point

[@odin255]

@@touchedbyawankel hey he used to do the SP ones with someone else, these are different ones he does through HISpool Aus, these according to Marcus are stronger and more reliable, yea the PWR SMIC and rad seem to be the best OEM fit items, he also does a really nice DP for the twins and a couple of other parts

[@touchedbyawankel]

@@odin255 That is the plan. I am on the search for a Knightsports downpipe. If I can't find one, I'm leaning towards the SMB 3.5 inch downpipe that he uses

[@rx7cblink]

Hey what’s up, were did you get all your parts from? Thanks in advance.