The ECU is located in the centre console at the front of the car. Remove the carpet and undo the retaining bolts on both the drivers and passengers side. Slide out the ECU from the passenger side, disconnectiing the loom plug as you do so.
Connect the ABC unit to the ECU as shown in the separate wiring diagram relevant to your ECU number. Fit the wastegate adjuster valve, using (more…)

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This article contains underhood views or schematics of vacuum hose routing. Use these vacuum diagrams during the visual inspection in F – BASIC TESTING. This will assist in identifying improperly routed vacuum hoses which cause driveability and/or computer-indicated malfunctions.
1991 ENGINE PERFORMANCE Vacuum Diagrams Camry, Celica, Corolla, Cressida, Land Cruiser, MR2, Pickup, Previa, Supra, Tercel, 4Runner.
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Instructions for K&N Filters Kit on Celica GT4
1. Unclip and remove the electrical harness plug from the AFM (Air flow meter)
2. Unclip and remove the intake hose from the AFM.
3. Unclip and remove the air box lid assembly.
4. Unscrew and remove the air box base from the inner wing.
5. Remove the AFM from the air box lid by removing the 4 bolts from inside the lid and the single bolt securing the AFM bracket to the outside of the lid.
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1. Remove the stock shift knob and boot cover.
2. Carefully slide an exacto knife under the clip on the right side of the assembly to remove it. CAUTION : Be extremely careful in this step, if the knife is torqued too hard the blade could break and become a dangerous projectile.
3. Insert a flat head screw driver into the gap created by the exacto knife to pry the clip off.
4. Use a punch to drive out the pin on the opposite side of the shifter. Tap lightly with a hammer until the pin is driven out of the assembly.
5. Remove the four bolts securing the plastic assembly to the chassis.
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Installation for Toyota Celica GT:
Disconnect the negative battery terminal before starting this installation.
1. Remove the stock air intake box and air intake duct leading to the throttle body. Remove the air temperature control sensor and grommet on the air intake box. Remove the Reducing air check valve located on the air intake duct. See fig. 7
2. Press the 2 1/2” straight hose onto the throttle body and use two clamps, tighten the clamp on the throttle body at this point. Take the 8 1/2’-10mm hose and press one end over the port on the valve cover. See fig. 2
3. Take the heat shield and slotted brackets and place them over the press nuts. Take the 5/16” flange bolts and screw them into the press nuts . See fig. 3 Slip the clamp that is on the filter over the the hooked ends of the slotted brackets. Now slip the neck on the filter through the hole and between the brackets. Slide the brackets up to the neck of the filter and tighten the 5/16” flanged bolts. See fig. 3
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A vehicle modified by the use of competition product(s) for use on public roadways may not meet local, state, or federal regulations. Installation and use of this competition product(s) may also affect vehicle insurance coverage. It is the purchaser’s responsibility to meet and comply with regulations and policies before operating vehicle on public roadways. There is no warranty stated or implied due to the unusual stress placed on competition product(s) and/or the inability to monitor their modification, installation, and use. The entire risk of quality, performance, and defect is with the purchaser and not the manufacturer, distributor, or retailer. Should any product(s) prove to be defective for any reason under any circumstance, the purchaser and not the manufacturer, distributor, or retailer will assume financial responsibility for any consequential damages, repairs/service, and any other liability.
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It is recommended that this set be professionally installed if you are unfamiliar with this type of work, and a factory service manual be purchased prior to performing any work on your vehicle for proper disassembly, reassembly and torque specs. These instructions are intended for bushing removal and install
of Energy Suspension polyurethane bushings, once you have removed the factory component from your vehicle.
1. Properly support the vehicle on the frame.
2. Remove the lower control arm. (Note: It is easier to remove the one bolt connecting the control arm to the spindle than it is to remove the three bolts that attach the ball joint to the control arm.)
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Hotchkis Tuning recommends that this sway bar set be installed by a professional, as the front sway bar can only be removed or installed by detaching the front engine cradle and lowering it from the vehicle!
Tools required for this installation:
- Hydraulic jack, jack stands, torque wrench
- The following sockets or wrenches: 12mm, 14mm, 17mm, 19mm
▪ The following Allen wrenches: 6mm
- Suggested tools: 6” socket extension, swivel ratchet
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Installation the strut for Toyota Celica. If struts are in good shape, gas/oil may vent. I suggest making a spray shield out of spray can lid.
Make a small divot in the middle of the strut base with an awl or nail. Carefully drill through the base with a 3mm (or 1/8″) Clean the base with rubbing alcohol, Windex, brake cleaner, etcetera, and affix a piece of tape to the base to prevent the oil from leaking out.
For the 8641-1212 Sport, make a mark on the strut housing 50mm down from the securing flange.
NOTE: If using a pipe cutter, the stock spring seat may prevent you from making a cut at this location. I found cutting at 40mm cleared the seat and still allows the insert to fit correctly.
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Removal of Factory Intake
1. Turn the ignition OFF and disconnect the vehicle’s negative battery cable.
2. Disconnect the mass air sensor electrical connection.
3. Depress the center pins on the push clips on the radiator core support cover.
4. Remove the radiator core support cover.
5. Unclip the relay and fuse box and move out the way.
6. Loosen and remove the bolt on the radiator core support.
7. Unclip the PWM vacuum switching valve from the air cleaner assembly.
8. Pull to remove the computer fresh air tube.
9. Loosen the clamps on the stock intake tube, then remove the stock intake tube.
10. Remove the two stock rubber hoses from the air cleaner lid.
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