|
|
Interior
|
|
|
Body
|
|
|
Electrical
|
|
|
Engine
Changing injectors on your TPI motor (Part 1 of 2)
- Submitted by: GARY 53
Changing injectors on your TPI motor is not a difficult project, just a bit time consuming.
Make sure you have the following before you start:
* A gasket set for the upper runner to plenum, lower runner to manifold, and throttle body to plenum
* Injectors. Make sure that what you have is the correct part number.
* A wide range of hand tools to include a Torx socket size T-40 and a torque wrench.
* Disassembly with air tools saves work and time.
* Thread sealant. Liquid type. For the intake manifold bolts.
Suggest you not drive the vehicle for a few hours prior to beginning this project, in order to allow the relatively high fuel pressure (43.5psi or higher) to bleed down.
Directions:
Remove the negative cable from your battery and secure. I also took my positive off due to having a direct charge alternator. Can never be too safe.
Begin by removing the air filter from the front of the plenum. This requires a 5/16. Socket or screwdriver.
Disconnect the throttle cable, transmission kick down cable (or TV cable if you have a 700R4) and the cruise control slotted cable (here applicable) from the throttle body.
Using a 10mm socket and 10mm combination wrench, remove the three bolts holding the cable bracket to the plenum. Cable tie the cable array to the side, out of the way.
Unplug the TPS at the front passenger side of the throttle body.
If you have done a coolant bypass on the throttle body, unplug the IAC (idle air control) motor, and, with a 10mm socket, remove the 4 bolts holding the throttle body to the plenum and set the TB aside. If you have maintained the factory heater/cooling lines to the throttle body, use cable ties to hold the throttle body away from the plenum area. I tied it off to the alternator bracket.
Remove the 8 top runner-to-plenum bolts, using a T-40 socket.
Gently lift up on the plenum from front to rear. You will have to remove four connections (more or less, depending on your motor) at this point that go into the plenum. First is the MAT (manifold air temp) sensor, which is located on the bottom side of the plenum, towards the firewall. This is a simple plug. If you have power brakes, there is also a ?. (Or comparable) vacuum hose at the very rear of the plenum on the driver's side that will pull straight off. The last two connections are on the passenger side back near the distributor, both are vacuum connections, usually one is dedicated for the MAP sensor and the other is for various other vacuum actuated items such as the defrost motors, etc. Now that all the connections are free, remove the plenum.
Remove the lower runner-to-manifold bolts, using the T-40 socket. There are 6 per side. **One bolt per side is hidden and only accessed from inside the manifold area. The one for the passenger side is accessed near the thermostat housing area, and the one for the driver's side is accessed between the fuel pressure regulator and the distributor. Having a good selection of extensions and a z. Air ratchet makes removing that driver's side one easy. LEAVE the bolts in the manifold, it will make it easier than trying to put them back in later.
|
|
Changing injectors on your TPI motor (Part 2 of 2)
|
|
|
|
Exhaust & Emissions
|
|
|
A/C & Heating
|
|
|
Brakes, Steering & Suspension
|
|
|
Transmission
|
|
|
Care & Maintenance
|
|
|
Restoration
|
If you'd like to submit a Tip, please Contact Us
|
|
