18RGEU Wiring Woes (56K BWARE) *It was alive NOW DEAD*

[BradW]

Fill in the relay pinouts below so we can work out where you went wrong.


EFI Main relay
Pin 86 goes to
Pin 85 goes to
Pin 30 goes to
Pin 87 goes to

[Spectre]

87 - battery
85 - +coil
86 - earth
30 - +coil



essential this

[BradW]

87 - battery
85 - +coil
86 - earth
30 - +coil

essential this

There is your problem. You are switching the relay on with the ignition switch and holding it on with the power coming out of the relay (pin 30).
Find out which wire on the coil+ is coming from the ignition switch. Take this wire off the coil+ and put it straight to the 85 pin of your main relay. Leave the wire from pin 30 to coil+ in place.

[thechuckster]

can i also suggest you use a relay (wired the same way asthe main EFI relay) to control power to the injectors - you only need to power them up when the key is at the IGN or start position.

The easiest way to do this is to use the the output of pin 30 on the main relay to also switch another relay controlling power to the injectors.

[Spectre]

can i also suggest you use a relay (wired the same way asthe main EFI relay) to control power to the injectors - you only need to power them up when the key is at the IGN or start position.

The easiest way to do this is to use the the output of pin 30 on the main relay to also switch another relay controlling power to the injectors.

Ive wired the injectors (which are fed via the ballast resistor) to the + side of the coil, as someone else said that they dont need to run straight from the battery.

[Spectre]

Problem fixed! Thanks everyone that helped out, +rep for you!

Just took the ignition wire off the coil, and ran it straight to the main relay.

[Spectre]

http://video.google.com.au/videoplay...35561&hl=en-AU

Video of the car running with no exhaust. Just got the alternator to wire up and then its off for an exhaust.

[Spectre]

Ok after getting it back from the exhaust shop, replacing the dizzy cap, spark plugs and leads, then finding it also had a blown headgasket (which is now fixed, and everything back together). It wont start!

First I found the fuel pump had died, so I swapped in a spare I had. Still dead.

Found battery was stuffed, got a new one, almost started but still dead.

Finding that when I push the flap of the AFM, the fuel pumps don't come on line they should when the key is in the "ON" possition.

Checked all my wiring back to the ECU and Relays - all fine. (also checked fuses they were fine).

I recon that the AFM might have had it. Is there a way to test this before I go and get another one. Ive got a muli-metre

Cheers,

Bryce

[RA35GT]

Hotwire the fuel pump (so its on constantly) and see if the engine starts/runs. (Don't leave it in this condition).

If it does then you know there is something iffy with the AFM.

You have two options then, if the AFM otherwise works and drives normally etc. you can get a tachometric relay to control the fuel pump instead.

The other option of course is to get another afm...

Rudi

[Spectre]

Hotwire the fuel pump (so its on constantly) and see if the engine starts/runs. (Don't leave it in this condition).

If it does then you know there is something iffy with the AFM.

You have two options then, if the AFM otherwise works and drives normally etc. you can get a tachometric relay to control the fuel pump instead.

The other option of course is to get another afm...

Rudi

Did this just after I posted Run the fuel pump off a spare battery so that it was constantly running.

It would cough and splutter and seem like its trying to start, but wont stay on. Is the AFM only job to control the fuel pumps?

[airfireman1]

I can lend you a AFM and computer if you want to do some swapping to eliminate them

[Spectre]

I can lend you a AFM and computer if you want to do some swapping to eliminate them

PM Sent! 10char

[RA35GT]

The AFM is the main load sensor to the ECU. It tells the computer the amount of air so the ECU can inject the right amount of fuel. (Controlling the fuel pump is only a secondary system in this case).

You don't have something simple like an air leak after the afm do you ?

Can you hear the injectors clicking? Plugs wet?

Strong spark?

[Spectre]

It's not the afm or the ecu, just checked with fireman's.

I actually think the plug to my ecu might have been a bit loose, as after i pluged it back in, the pumps come on when the AFM is opened.

It will cough and splutter then die (like theres not enough fuel). And it backfired through the throttlebody once.

Once or twice I heard a weezing sound like air escaping somewhere.

the injectors leak a little bit of fuel when i move them.

Bryce

[RA35GT]

The fuel pump control of the AFM doesnt connect to the ECU, its more likely that the plug on the AFM was a little dodgy?

Are you sure the cam timing is correct? (and the spark timing? And dizzy leads?)

If the injectors are leaking you should fix them also, could be rather dangerous depending where its leaking from/to.

Rudi