Help with 4af to 4age conversion?

[lazy_kiwi]

Hi, have swapped a red top 4age from AE92 Trueno into AE92 Corolla NZ new ex 4af carb.

Need a little help trying to get it to start.

It cranks but doesnt even sound like its trying to fire up, no ignition at all, just cranks over and over.

Have swapped the tank over to a fxgt with internal pump and am a bit suspicious about whether the pump is working or not.

Good things is, a mate has a running AE92 levin to test what works

This are my findings so far:
ECU is good.
Ignitor - good
silver thing under ignitor (ballst?) - good
coil - good
lead from coil to dizzy - good
fusebox in engine bay is good too
have cross checked the wiring and looks sweet to me - all earths seem good

Thngs to note:

I dont have a speedo cluster working yet, trueno one has a different style plug setup on the loom for some f*cked up reason?

I have no exhuast - but have manifold and o2 sensor

Fuel pump. Suspect this might not be going but when i put a little compressed air down the return is gas is pushed into fuel rail

Ignitor wiring is reading lower voltage on the black/yellow stripe wire which I believe is a ign confirmation wire? my mates one is reading 4.7 volts and mine less than 1?

Any help is greatly appreciated.

Im in upper hutt, welcome to come take a look if they want.

[gasman]

have you checked that you have power to injectors, ignitor, ecu, coil, afm, tps?

i missed the power feed to the ignitor once during one such conversion which held things up for a while.

one way to check if the fuel pump is working is just to disconnect the feed to the rail and put it into a bucket and try cranking it.

[lazy_kiwi]

update

ignitor has plug with 5 pins, 1 and 3 have 12v, five is sus (mates 4 age reads 4.7 and mine is only 1ish) - 2 and 4 seem to get volts once running (checked on working 4age)

coil is getting power - checked this
main coil lead also putting out 12v

Just checked the fuel pump volts and reading only 0.6v ?? also cannot hear it pumping. wired 12 volts direct and she pumps hard.
cracked banjo bolt on fuel rail and gas sprayed out everywhere. So now confirm that there is a fault with power to pump. So where to begin with that? 0.6v? sounds like its coming from relay?

However, with 12v direct from battery to pump, tried to crank and still not sparking. Fuel smell from exhaust so I'm sure injectors are going

But still not even sounding like it wants to fire

[lazy_kiwi]

Hey thanks for replying - appreciate your help

have you checked that you have power to injectors, ignitor, ecu, coil, afm, tps?

Injectors - not sure how to test but can smell strong petrol smell from exhaust manifold so assume yes

ECU - has power to 2 pins on one of the 3 connectors - so think this is ok too

Coil - yes 12v there

AFM - not sure but tested starting working levin with this unplugged and she started - but can test for voltage

TPS - have not tested yet - will try this too

one way to check if the fuel pump is working is just to disconnect the feed to the rail and put it into a bucket and try cranking it.

Fuel pump is not pumping on ign and cranking, not getting voltage to it(only about 0.6v during crank) but when bypassing and wiring direct to 12v, pumps hard - tried cranking with it hard wired and still no spark

[themaleman]

tried getting the diognostics codes?

[lazy_kiwi]

tried getting the diognostics codes?

nah, dont have an instrument cluster so no CEL. Trying to use the one from mates levin but plugs are different

[gasman]

just hook up a light to the check engine light of the ecu plug and have 12v going into the other terminal of the bulb. the ecu acts as the earth for the bulb.

[lazy_kiwi]

okay will try this too, need for find a clearly labeled pin out for the ECU.
Also, think mine does not have AFM either so that should take one thing out of the equation.

I think I need to start my focus on why the fuel pump is not getting power. Then maybe this could correct the ignition.

The pump should pressurise for a few seconds the moment the key is turned right? then shut off and only fire when cranking/running? ECU controls the voltage to the pump? When I switch to ON, no volts on pump wire. When I turn to START - reads about 6v then starts to drop about 1volt a second whilst cranking over

Tried jumping the fuel pump on diagnostics and made no difference (no or low volts).

Anyone have any thoughts on what could be the issue? Remember I have tested the ECU in another levin as its started first pop.

[lazy_kiwi]

It's alive!

Found a couple of loose connections in the interior fuse box and fiddled with these, next thing can hear new noises from engine bay when switching to the ON position.

As for fuel pump, well, there is definitely an issue with voltage to it, I wired a direct 12v to it from a spare connector (gets power at ON position) and direct to pump - its working and still using normal earth too (so I know its not a bad earth prob)

So the engine starts but how to fix this fuel pump wire? Anyone had this issue before?

Have not yet got a CEL going to test, but will work on this too

[gasman]

did you hook up the open circuit relay for the fuel pump?

[lazy_kiwi]

did you hook up the open circuit relay for the fuel pump?

Yep, checked that last night after some hardcore googling.

Found the relay, was in there okay.

I can confirm continuity on blue/black FP wire from relay connection to pump is okay. Also, green/red from relay connx to ECU is okay too. There is 12v hitting the middle pin (I guess that the main power in) but getting no voltage from either two pins on other side (one must a ground?)

Now need to figure how to test the relay & what the other pin goes to?

Also, do you what the fuse and relay is for on the passengers side? It is bolted to the inside of the kick panel.