86 4age conversion help

[bennyq]

hi all, im currently in the process of doing a bigport 4age conversion in my 86.
its going slow but steady.
i was hoping someone could tell me exactly how i should wire up the electric fuel pump.
i got it from sprint autoparts, its made for a vl commo. that seems to be the way to go from what ive read?
anyways, from what i can understand i should install the pump, making sure it is lower than the fuel tank. Should i also replace the lines?
if so what type of lines should i use?
also, can someone help me identify what the plugs at the end of my 4age loom are?



it comes off the end of the loom, the square one is meant to earth to the coil im pretty sure. dunno what the other two are for tho however? :/
ps. i did search for the fuel line question but couldnt come up with any conclusive answers really.

[Matt]

As for the lines, use the stock metal lines under the car, but buy EFI hose + filter for within the engine bay.

[timbo]

The blue one goes to the coil/igniter
The black one in the middle is the starter trigger
The yellowish one looks like the o2 sensor

[timbo]

Also that is one ragged looking motor!

[timbo]

Also looks like you have an MR2 dizzy that has those two threaded holes for a heat shield. Get or make one so your next dizzy cap doesn't melt like that!

[slide86]

........and the dizzy has been removed and refitted, your timing is going to be out......you will need to reset that properly.

You will need to setup a relay from the Fc terminal on the ECU to control the fuel pump. i gather there is no COR (circuit open relay) so you will need to setup your own relay for the fuel pump.

You will not need to change the fuel hard lines, only the soft lines to the correct EFI pressure rates lines.

[bennyq]

cheers for your help timbo, yeah the engine looks shit hahah but it is ok for the budget im on.
with a bit of paint on the covers it will look fine haha

slide86- yeah im fair annoyed about the dizzy being taken off coz i have no idea about how to get the timing right on a 4age.
ive read up abit but yeah not too enthused about doing it.
cheers for the info on the fuel pump wiring, theres a wire that goes from the fc terminal on the ecu to a relay, so im pretty sure i just wire the fuel pump to that relay then.?

[timbo]

Timing is easy man, buy a cheap timing gun.

Reset the dizzy.

- Take out the dizzy and take off your oil cap.
- Grab a spanner and rotate the crank clockwise until the timing notch on the crank pulley lines up with 0 on the cover.
- Look down the oil filler hole and try and look for a dimple on the intake cam, if you can't see it rotate the crank all the way around to 0 again and you should see it. This is call Top Dead Centre (TDC)
- Grab the dizzy and having it facing up in your hand and rotate the shaft until the dimple on the shaft lines up with the dimple on the dizzy near the o-ring
- Now both the motor and dizzy are at TDC
- Carefully put the dizzy back into the head trying not to rotate the shaft as the cam and dizzy gears meet. I find the dizzy should go in so that the two bolts holes are roughly in the centre of the dizzy brackets.

Obviously you can't time the motor with out it running but if you do this while the motor is out it will be a lot easy than doing it in the engine bay.

[bennyq]

ah you're a legend! cheers man, i did the timing today but dont reckin i did the dizzy right so im going to use your instructions and re-do it again tomorrow!
thanks dude!

[Matt]

Might also be worth to know that you should "never turn an engine anti-clockwise"

Reason being is the timing belt tensioner is setup only to really work whilst the motor is running and the crank turning in a clockwise motion. If you are unlucky the timing belt may lose tension and the cam timing can go out of alignment if you turn it anti-clockwise.

In allot of cases when you hear of a timing belt skipping a tooth, this is what has happened.

So if you spin the motor past the 0 marker on the crank, then just keep turning it all the way around again.

Also don't forget to bridge the diag terminals when checking with a timing gun as the ecu messes with the timing advance.