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 Turbos Explained  

Chapter Quick Reference
0:00 - Intro
2:56 - Factory Part Numbers / Parts List
3:32 - NGK Power Cable Plug Wires
4:13 - JP3 LIM block off plate
5:45 - UIM Removed Rats nest Exposed
6:22 - Solenoid chart
6:35 - Fuel Rail Diagram
7:06 - Coil Pack and Rats Nest Removal
9:02 - Rats Nest and coil packs outside the Car
13:40 - Viton One Way Valves
15:10 - Silicone Hose
16:08 - Vacuum Diagram
17:20 - More Solenoid Diagram
18:02 - Fuel Rails in Car
18:30 - Fuel Rail FPD FPR and hose Replacement
22:43 - Injector Diffusers and Gromets
25:15 - Cleaned Fuel Injectors
28:06 - Oil Injector Vacuum and bare block/manifold
29:08 - Fuel Rail Installed
29:40 - New Vacuum Hoses in rats nest
32:45 - Fuel System Pressure Test
34:42 - Coil Packs Installed
35:00 - Vacuum Hoses to UIM
36:00 - New plug wires installed
36:17 - Oil Filler Neck O-Ring
37:34 - Turbo Pre-control and Turbo Wastegate Control Solenoids
38:46 - Sequential Operation Test Drive

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.