Fuel injection would for all purposes improve the driving experience of the vehicle while providing increased power and fuel consumption. Two things that aren't usually synonymous when talking about motors. It would also cost a fraction of a motor swap which would have been great if it would be that straight forward.
Most of the computer bits would be compatible with that used to run a 2.7l Toyota motor given some added wiring. So if a motor swap is on the horizon these bits have already been bought.
As said in the beginning it all started some time back and bought the first bits last year Feb - march already.. Had time to clean and do additional research into which computer system to use. I finally decided on the Spitronics system. The system was bought mainly because there is support in Bloemfontein from known Independents and that the distributor does not need altering or modifications. The system comes with a detonator built into the ECU.
From a previous thread on cleaning aluminium I dropped the manifold into swimming pool acid which turned it blue and slightly "dusty" as the oxidized aluminium left a residue on the manifold. This removed all the oily residue form storage and previous motor it was used in. The local Bosch dealer sandblasted it for me in return for a 2l Coke for his staff.. ;D The result was rather worth the effort..
Well worth it I would say.. Very happy with the results. Some cleaning was needed to remove all the sand from the throttle body section of the manifold.
This was the start on Monday last week.
Everything ready for fitment or what I thought would be everything.. As soon as work starts there is a hundred and ten little things you never knew about.
Parts purchased for the conversion:
Spitstronic ECU, wiring looms, relays and fuse holder
High pressure fuel pump
EFI manifold including, fuel rail, injectors, fuel pressure regulator, throttle body
Single coil magnetic distributor ( A 24 tooth dual coil distributor also available)
Fuel lines
Additional wires, and fittings
Wire trunking
Air hoses and other fittings
Air temp sensor
MAP sensor (Manifold Absolute Pressure - as used in other Toyota's)
Lambda sensor - for fine tuning
Idle Control Valve or stepper motor
The wiring was done as far as possible but eventually the motor would have to be stripped to continue with the conversion..
This was soon changed to this..
After stripping the manifolds off of the head all surfaces was cleaned and prepped for fitment of the new intake manifold. The new manifold is fitted in two parts. The bottom section holds the injectors and fuel rail as seen in the pics.
After this the top section of the intake manifold could be fitted. This section have been pre-assembled with the throttle body and some of the vacuum lines.
Then it was time to remove the vacuum advanced distributor and replace it with the replacement magnetic distributor. The pic shows the whole in the block where the distributor drive shaft fits onto the cam/oil pump.
Wiring was next on the list. Even tough it is a much cleaner job it was still pretty involved with all the do's and don'ts according to the easy to follow instruction guide. It was slow going but in the end only the fuel pump had to swing around as it was fitted in the wrong direction.
Wiring was done on the left hand side of the vehicle to make use of this open space under the hood.
The last part fitted was the only none Toyota mechanical part. The Idle Control Valve was taken from a 2l Jetta 3 as they are much larger than the original Toyota valve and is capable of idling the motor when under load such as inclines.
And the final product.. All wiring done and fitted into trunking..
Ps. Seals on the injectors will be replaced for a second time as it seems the pressure in the rail is to high and the o-rings at the top of the injectors keeps on leaking after some use. The loss of pressure prevents the motor from running..
I will only be able to get my hands on an adjustable fuel pressure regulator next week and will then post more on the actual performance of the newly enhanced 4Y.. 
)learned a lot from the experience.
Die rooi wys waar die petrol in kom na die rail toe en die groen wys waar dit uitgaan. In die inkomende kant sal jy sien is die pyp reguit op die rail gekoppel en ek is nou besig om een van daai dampers te soek.
