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VK EFI Wiring

*** Thanks to the Top Lads who put up the Bedford topic line, THANKS ***

Now can any one help me wire up the EFI engine harnes into my Van, I relise that I have ti power it from the BATT via a relay and some wires have to go to the coil and fuel pump... However My Manual has no detail of the EFI side of the wiring.... So Far I have the Engine harnes separated from the rest of the VKs harness... about 30cm back from the computer connector there is another plug with 7 wires... (clockwise from top, Car end of plug) 1 Thin Purple, 2 Thick White, 3 Medium Purple, 4 Thick Black, 5 Medium Grey, 6 Medium Pink and 7 Thin Brown...
Any insight into this would be of great help cuz I am flying blind...
Let me know if there are anymore wires that would need to go places that you know of other than what is on that plug....
Thanks for all your help, Croppy......
PS. Thanks also to sammy for his help so far.. '

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Comments

I thought i sent the EFI wiring diagrams to you.

Either way i will tell you what i know of the above listed wires.

Ok, theres two wires that are purple going off the wiring diagram, one of these goes to the idle load compensator which is on the bottom front of the throttle body, it basically adjusts the air/fuel mixture when the a/c etc is on, if you don have a/c then its not needed, i didn't connected it on my car. The other purple wire is for the fuel pump, i think you can just not connect it and connect the wire you run from the fuel pump to the relay.

the thick white wire is earth for the injectors, this should be connected the the earth wire on the relay and then should be connected to a earth on the body of the car.

Black also is to be earthed as with the white and grey wires.

The brown wire is for the negative coil connection.

The pink wire is the one that is the connection from the ignition switch to activate the coil, this needs to work when the key is in the on and start positions.

Theres also one more wire which you need, on the wiring it shows as a orange wire which runs from the batteries +ve directly to the relays power.

this should get you out of trouble.

ps. if you didn't get the wiring diagrams i sent you let me know via email and i'll send them again.

Sammy.

sammy@cn-newc.com.au'

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theres a few stuff ups there, firstly, as states above, the purple wires goto the fuel pump (thick wire) and the other purple runs to the solenoid so it supplies more fuel to the car when starting.

the below statement should read differently, where it says COIL it should say RELAY.

The pink wire is the one that is the connection from the ignition switch to activate the coil, this needs to work when the key is in the on and start positions

Sammy.

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My uncle used them on concrete mixers(trucks) to spin the bowls. I am sure the list is long.

Thanks to the top lad with the bedford !

Looks like a bit of fun this oldholden site, been a bit busy and slack as it needs a bit of upkeep.

john

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VK EST brainteaser. 5 or so years ago engine performance degraded soon after block and head were decked and reinstalled and have not changed or worsened since then.
Symptoms: Engine starts OK, idles smooth, drives OK everything fine until the thermostat opens and temp gauge starts to rise.
At this point engine starts to runs very rough. At idle the whole car runs rough with engine making noises as if it were badly timed. During this early phase, when driving 0 - 80 km/hr, you can feel that the engine is running very very rough, bonnet vibrates and when I stop at lights at this point the engine runs like a dog but doesn't stop.
10 or so minutes after startup and driving, the engine smoothes out a bit but never runs as smooth as it should and continues to idle rough. When cruising, engine roughness not as noticable, but up hills under load engine runs a little rough and is not as powerful as it should be. Sometimes durin cruising the EST dash light would light up but would go away again.
Things I have tried: (1) Checked for vacuum leaks on all manifold faces and all hoses, (2) replaced manifolds gaskets etc, (3) Carbi checked, serviced and system inspected for vac leaks etc. by Dyno Tune, Holden Aust, and 3 reputable specialist carbi shops. (4) Numerous brainstorming sessions with mechanicy friends and internet research. (5) Replaced EST system with VK EFI dizzy, unplugged the EST computer in the cabin, unplugged the two EST leads on the Carbi,disconnected the EST vac hose from Manifold to fuse box, plugged up any spare vac ports.
NONE OF THESE CHANGES HAD ANY EFFECT AT ALL. Engine performs the same as before, some improvement in power performance with change of Dizzy but roughness symptoms unchanged.

Simce replacing the dizzy ,in accordance with wiring details from these postings and elsewhere, I have an additional piece of info. Same as before but now just as the thermostat start to open/dash gauge registers, within a couple of seconds EST dash light comes on and engine seems to then start running rough.
I could not figure which of the wires in ther loom at the back of the head is the one for EST flashing dash light diagnostics to test the EST system, instead I replaced the EST system with VK EFI dizzy.
My next guess is that the carbi is malfunctioning somehow and I thought to replace it with a XE falcon Holly to also improve the performance.
What is the problem, I'm frustrated, I'm desperate, did I miss something in the Dizzy changeover, could it be that the decking of the blocks has exceeded tolerance and is affecting the lifter/push rod/valve mechanics, Please help all assistance gratefully accepted.

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i had a this problem with my vk years ago the float bubble or what ever you call it was (water logged) with fuel of cause dam new one cost $42 at the time. got it at fuel miszer,its woth a shot.Rob

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Thanks Rob,
good suggestion but I already checked that one. I have had the fuel float replaced, and last time the carbi guys weighed the float it was OK and I have given it a visual OK myself. There was no change in engine performance after replacing the float or any subsequent carbi tinkering by me or pros I listed, (we could of course make it run worse).
Jovan.

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