Tweak'd Full Engine 1UZ Wiring Harness Universal Race Car UZ V8 2UZ 3UZ
These are custom made to order. Expect to send in your original harness, and minimum of 10 week wait time.
Finally, a full harness for your V8 swap to make things much easier! We've done more than a few over the past decade, and now we're teaming up with the renown Dr. Tweak to offer a top shelf harness and their lifetime warranty!
These harnesses are all custom made for each individual application, so in many cases, we will need a core harness to start with. Expect to need to send in your UZ harness, as well as your intended chassis' factory engine harness, depending on which it is. Connectors typically do not get reused from the original harness'; we just need them to verify connector type and length as the UZ engines have a variety of harness differences depending on year and chassis.
Please contact us and let us know directly what your application will need regardless, and we'll be happy to get another UZ powered vehicle out there tearing it up!! As of right now, we only have support for automatic transmissions if you run the factory ECU for them.
Standalone applications will require a dual ECU setup in most newer 1998+ chassis'. On Toyotas specifically, the factory chassis ECU gets retained for MultiPlex compatibility, meaning the factory ECU will control the A/C, gauge cluster, throttle, auto transmission, ABS, etc. Feel free to reach out to us with what your swap is and we can make sure you get the right price and harness for your application!
- Shipping info
We deliver worldwide
- Payment methods
- Return Policy
We accept returns
- Engine1UZ, 2UZ non VVTi, 2UZ VVTi, 3UZ
- VVT-iNo, Yes
- Transmission TypeManual Nissan Z 6 Speed, Toyota Automatic (ECU must match trans), Manual R154, W55/W58, Unlisted (Contact us), KA/SR Nissan 5 speed, Manual V160
- Alternator PlugOval, Round
- Engine ManagementFactory ECU, Haltech Elite 2500, Haltech PS2000, AEM Infinity 708 / 8, AEM Infinity 508 / 8h, Other aftermarket EMS (contact us), AEM Infinity 506 / 6, ProEFI 128, LinK G4+ Xtreme, LinK G4+ Storm, LinK G4+ Thunder
- Starter PlugRound (newer), Square (older)
- MIL-Spec Firewall ConnectorTweak'd anodized plate and grommet, MIL-SPEC connector and plate (manual trans only), No, Reuse firewall bulkhead grommet
- Injector TypeHigh Impedance factory style, Aftermarket Square Bosch, low impedance, Aftermarket Square Bosch, high impedance, Low impedance
- Coil Pack/IgnitionFactory, AEM Smart Coils, Other, 1ZZ Toyota Smart Coils, GM LQ9/LS2/LS3 Smart Coils
- MAP Sensor TypeOEM Plug/None, Aftermarket, AEM, Aftermarket, other (contact us)
- IAT Sensor TypeOEM Plug, Aftermarket, AEM
- O2 Sensor TypeToyota 4 Pin, Toyota 3 Pin, AEM Wideband, Bosch LSU4.9 Wideband, Bosch LSU4.2
- TPSFactory (matches throttle body), Q45 TPS w/Nissan 3 pin Plug, Q45 TPS w/GReddy adapter
- Temp Sending UnitUse original from supplied core, Round Plastic, Metal Spade, Universal 2 wire unterminated
- Oil Sending UnitUse original from supplied core, Round Plastic, Metal Spade, Universal 2 wire unterminated
- Boost Control SolenoidNo, Yes, weatherpack 2 pin
- Fuel PressureNo, Yes, 3 pin psi sensor (aftermarket ECU only)
- Oil PressureNo, Yes, 3 pin psi sensor (aftermarket ECU only)
- Clutch PressureNo, Yes, 3 pin psi sensor (aftermarket ECU only)
- Exhaust BackpressureNo, Yes, 3 pin psi sensor (aftermarket ECU only)
- Coolant PressureNo, Yes, 3 pin psi sensor (aftermarket ECU only)
- Flex Fuel (does not include sensor)No, Yes, Continental sensor, Yes, ProEFI sensor 4 pin
- Cam/Crank SensorsFactory Toyota, SRT/Hall Effect
- Intended ChassisUniversal, non specific fitment, LS400 UCF10 (1989-1994), LS400 UCF20 zenki (1995-1997), LS400 UCF20 kouki (1998-2000), SC400 Z30 non-VVTi (1991-1997), SC400 Z30 VVTi (1998-2000), SC430 Z40 (2001-2010), GS400 (1998-2000), GS430 (2001-2005), Mk3 Supra (1986-1992), MkIV Supra (1993-1998), 240SX S13, 240SX S14, Other (contact us), IS300 (2002-2005), IS300 (2001 only), FR-S/BRZ/86/GT86, 80s Toyota Pickup/4Runner
Most product ships from either the manufacture or largest wholesale location to pass the saving to you. Most orders will ship via UPS, as we will be able to provide the best rates and have had the least issues when using UPS.
IF YOU DO NOT LIKE THE AUTOMATED SHIPPING CALCULATOR'S RATES, PLEASE CONTACT US AND WE CAN GET YOU A BETTER ONE! Especially for anyone outside the USA, please contact us with a list of parts you'd like to order, and where you are located.
- Fitment TypeVehicle Specific
Make | Model | Year | Submodel |
---|---|---|---|
Toyota/Lexus | Lexus LS/Celsior | 1989-1994 UCF10/11 LS400/Celsior | 1UZ-FE 4.0 V8 non-VVTi |
Toyota/Lexus | Lexus LS/Celsior | 1998-2000 UCF20/21 LS400/Celsior | 1UZ-FE VVTi 4.0 V8 |
Toyota/Lexus | Lexus LS/Celsior | 1995-1997 UCF20/21 LS400/Celsior | 1UZ-FE 4.0 V8 non-VVTi |
Toyota/Lexus | Lexus LS/Celsior | 2001-2005 UCF30 LS430/Celsior | 3UZ-FE 4.3 V8 |
Toyota/Lexus | Lexus GS/Aristo | 1998-2005 S160 | 1UZ VVTi 4.0 V8 (1998-2000) UZS160 |
Toyota/Lexus | Lexus GS/Aristo | 1998-2005 S160 | 3UZ 4.3 V8 (2001-2005) UZS161 |
Toyota/Lexus | Crown Majesta | 1995-1999 S150 | 1UZ-FE 4.0 V8 (UZS151, UZS155, UZS157) |
Toyota/Lexus | Lexus SC/Soarer | 1992-2000 Z30 | 1UZ-FE VVTi 4.0 V8 UZZ30 (1998-2000) |
Toyota/Lexus | Tundra | 2007-2021 2nd Gen | 2UZ-FE 4.7 V8 |
Toyota/Lexus | Tundra | 2000-2006 1st Gen | 2UZ-FE 4.7 V8 |