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Help Needed

jangles

By jangles,
in Tasmania

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jangles Veteran

jangles

Posted
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Hi,

ive just recently replaced my RB20DET,i bought a long engine

since putting it in the front 3 cylinders wont fire, the coils etc. worked fine on the last engine.

ive replaced coilpacks, plugs, and the coil loom

but there doesnt seem to be anything getting to the front 3,

i have also swapped a front plug to a back coilpack to make sure,

and it proved that there isnt anything to the front 3 plugs....

any ideas on what it could be?

thanks in advance

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DJRIFT Veteran

DJRIFT

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seems you have checked over the spark side of things. now try the fuel?

chesk or swap over the injectors. check all the wiring surounding the injectors for broken or dirty plugs and wires.

are you using the old origional loom?

just a few starters.

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jangles Veteran

jangles

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seems you have checked over the spark side of things. now try the fuel?

chesk or swap over the injectors. check all the wiring surounding the injectors for broken or dirty plugs and wires.

are you using the old origional loom?

just a few starters.

i was using the original coil pack loom, have replaced it now. am still using original main loom.

i havent swapped the injectors over but there is fuel on the plugs when i check them

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jangles Veteran

jangles

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Have you checked the earths for the coils???

Also check continuity within the loom as i've had that trouble before.

yeh, checked the continuity today, also just brought my meter home from work and tested

the plugs running and there is voltage to the plug....

its really confusing me

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DJRIFT Veteran

DJRIFT

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if you have checked every coil out and you have put a new loom and plugs in than im pretty sure spark is covered. id still be looking for injection pulse to all the injectors or even be swapping the injectors as they may be shagged.

the reason i mentioned them as the front 3 and back 3 injectors are wired kind of seperate so it stands out to me if you are having trouble with 3 of them. they all share a common ignition feed which is 12v on a white with black trace wire. the loom has this main wire comming through to the front 3 injectors where it splices off into 4. 3 wires to the front injectors and 1 wire to a plug at the front of the engine that then turns pack on its self and splices into 3 agin to the rear 3 injectors. all the injectors are then earthed through the ecu individualy and are white wires with coloured traces.

also have you tried a different ignition modual as i have have them fail on 3 cylenders only before. so maybe the front 3 coil packs arent even being swithched.

to check that they are all being switched. Use a test light not a multimetre. Unplug all the coils. check they all have ignition power to them. Put one end of test light on battery earth and the other in the coil pack plug. (should be the red wire that you have ignition on)

check they all have an earth. Put one end of the test light to battery positive and probe each coil plug. (should be the black wire)

then leaving the test light on battery positive and put the other end in the pin in the coil pack plug left. (should be white wire) now get a friend to crank over the car and the test light should flicker on and off. do it to each coil pack plug and you will then know that all the right spark stuff is happening.

then look at the fuel.

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  • 2 weeks later...
jangles Veteran

jangles

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Posted (edited)

Got the 32 running today,

after the loom was fixed i

got it hooked up to diagnostics and everything is working fine, except the O2 sensor is stuffed.

replaced the plugs because of them fouling from running like crap but still has a slight niggle.

i dont believe the o2 sensor i the issue,

any recommendations now?

Edited by jangles
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DJRIFT Veteran

DJRIFT

Posted
Posted
Got the 32 running today,

after the loom was fixed i

got it hooked up to diagnostics and everything is working fine, except the O2 sensor is stuffed.

replaced the plugs because of them fouling from running like crap but still has a slight niggle.

i dont believe the o2 sensor i the issue,

any recommendations now?

so your fault was in the wiring? had it been pinched during engine swaps?

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jangles Veteran

jangles

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only the coil loom, one of the wires had an itermittent fault, only firing some times.

reconnected the problem wire and it all worked fine.

by worked fine, i mean everything is getting told to do the right thing

Edited by jangles
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