Injector Problem Testing

[CRXer]

Firstly test the tester is working.

Hook up the black wire off the tester to a good ground(cant see in the photo whether u did this or not but i assume u did).

Then touch the tester on the battery positive terminal to make sure it lights up & is working correctly(Do this with any test equipment to make sure its good,before it leads u down the wrong path).If it lights up & is working correctly,leave the ground clip(black wire on tester) where it was because u at least know it is grounded correct where it is.

Did u test both pins in the plug?
i assume u did this as well.
Is the common wire between all 4 injectors yel/blk like weve been discussing?

If still no light on tester when u done all this,then next step is to look at the main relay & possibly after this look at the ignition switch.If u confidently can hear the fuel pump prime when u first turn on ignition than ignition switch will be ok & its definitely a prob with one of the coils in the main relay.

Find the main relay & u will possibly see 3 yel/blk wires.One will be by itself(this will be the fuel pump wire,ignore this wire).
The other 2 yel/blk wires will be joined to the same pin(one goes to the injectors(branches off to all 4 injects at the shock tower) & the other goes to the ecu)
Turn ignition on & in the same manner as above ,test that your tester lights up when u touch these 2 yel/blk wires at the pin.Dont forget to test tester first by touching it to the little bit of exposed metal on top of the fuses under dash(a few of them should make it light up with ignition on,not all)

If still nothing,test the blk/yel wire on the main relay makes the tester light up.If it does than u need to either read this DIY (by ECU-MAN again)
or borrow or buy a new main relay.

Go thru all the stuff above before buying anything thou & dont forget ALWAYS TEST THE TESTER

[XP02ED]

yup!
tested both plugs and the ground, tester works.

yup it was yelo/blk on all injectors and i tested both wires to be sure.. no light appear!

yeh ignitions is definately working and so is the petrol pumping, as fuel rails have petrol pumping into it and removed the pipe thats goes to the rails and got petrol pumping out.

gmmm wheres the main relay or what is the mail relay? is this the wiring harness? where should i be looking for this!

yup tester works, i grounded it to the battery!

[CRXer]

Main relay shown in this thread click here
Could be black colour also,instead of grey.

It would be just above your hood release lever I think in an EG,got an 8 pin plug plugged into it with only 7 pins used.

Just try to pull the plug out of it for test or u might have to unbolt it from its mount to get access to it if its jammed in anything like mine

[XP02ED]

aiight looks like ill have to give that a go tmz!


what will i be looking for in this main relay?

would someone comming doing a pulse test on injectors save alot of trouble?

[CRXer]

Find the main relay & u will possibly see 3 yel/blk wires.One will be by itself(this will be the fuel pump wire,ignore this wire).
The other 2 yel/blk wires will be joined to the same pin(one goes to the injectors(branches off to all 4 injects at the shock tower) & the other goes to the ecu)
Turn ignition on & in the same manner as above ,test that your tester lights up when u touch these 2 yel/blk wires at the pin.Dont forget to test tester first by touching it to the little bit of exposed metal on top of the fuses under dash(a few of them should make it light up with ignition on,not all)

If still nothing,test the blk/yel wire on the main relay makes the tester light up.If it does than u need to either read this DIY (by ECU-MAN again)
or borrow or buy a new main relay.

Before we go any further u have checked the ECU fuse in the engine bay fuse box havent u,I just always assumed this?

A pulse test is useless,cos uve already determined that there is no power getting to the injectors

[XP02ED]

oh really, oh aiight sweet

BWAHAH yeh i have i checked that the ECU fuse isnt broken

well i habnt replaced it or changed it to make sure, should i? maybe i should!

so basically since i got no light commming out of the injector lines no point doing a pulse test ! cool! saved me money!

[CRXer]

Triple check the ECU fuse will save any further hassle if thats the prob.

Touch your tester on both bits of exposed metal on top of the fuse one at a time when its still in place & see if the tester lights up.

[XP02ED]

aiight ill check that out, i might just buy a new packet and replace it just to be sure as well

ok so basically now once i tripple checked the fuses.

i go to the main relay and look for ..


the shock tower = where the wires connect to FROM the injectors. from this shock tower it becomes one wire? is this correct? which then connects to the main relay?

there will be 2 wires comming FROM the main relay one going to ECU and other going to the shock tower!

if im correct please tell me! so i know if im getting the layout of the wiring end!

[CRXer]

aiight ill check that out, i might just buy a new packet and replace it just to be sure as well

ok so basically now once i tripple checked the fuses.

i go to the main relay and look for ..


the shock tower = where the wires connect to FROM the injectors. from this shock tower it becomes one wire? is this correct? which then connects to the main relay?

there will be 2 wires comming FROM the main relay one going to ECU and other going to the shock tower!

if im correct please tell me! so i know if im getting the layout of the wiring end!

Yes all correct,u will prob find some spare fuses in the fuse boxes unless u used them up already.Or just pinch one from the power windows,rear defog or similar & test it briefly,doesnt matter what size it is for just testing puposes,just put the correct one in before starting it or driving.

[XP02ED]

aiight sweet as! thanks dude will give it ago, i may need to replace fuses so i might as well buy a pack..

will give and test all this tmz and take some pictures, might help to determine stuff for me to show what i do! will keep it posted up!

thanks for all the help! much appreciated dude!

[CRXer]

yes,pics make it alot easier

[XP02ED]

ok no a dumb question ready that post and about the relay
he said it can be found under the glove box!

is this where i find it?

btw will i need to unplug the harness to check the main relay wires, im assumin no becaus no power will be put into it,

so im guessing there should be metal bits ontop of the plug to do the test