Misfire

[che.283]

Hi everyone, i'm having a serious problem with my VR4, its not firing on plug 2 & plug 3.
So far i replaced the plugs, leads, coilpack, CAS all with brand new parts, all with no luck fixing the problem, ive taken the plugs out and plugs 2 & 3 are clean and smell of fuel (1&4 are dark and have been firing, i took the timing cover off and the cam timing looks right, it's got me stuffed what is wrong, anyone got any ideas out there?
the problem originated when i was on my way back from surfers on sunday, i stopped at supercheap to get some stuff, when i started the car again everything was fine and then after about 30 seconds of idling the idle dropped to about 600rpm and had had a bad misfire, since then i have replaced all them parts with no luck at all.
Anyone got any ideas?
Cheers
Matty.C

 

[GSR]

ignition module maybe?

 

[Gianni]

Hmm. So no spark from those plugs, check signal to the coils and ignitors. Make sure all are getting proper signals sending/recieving

 

[Gianni]

I'd really be looking at your ignitors. It's Next to intake manifold above aircon compressor check how many pins I may have a spare.

 

[che.283]

I'd really be looking at your ignitors. It's Next to intake manifold above aircon compressor check how many pins I may have a spare.

Yeah mate, brand new set but on my way to checking out the wiring!

 

[che.283]

I'd really be looking at your ignitors. It's Next to intake manifold above aircon compressor check how many pins I may have a spare.

forgive my lack of knowledge but what is the ignitor? is it the black box below the intake manifold where the screws are behind the timing cover?

 

[GSR]

power transistor/ignitor/ignition module its a same thing

this is what it looks like

 

[che.283]

power transistor/ignitor/ignition module its a same thing

this is what it looks like

awesome so i know where it is, how to i go about testing it? i have a multimeter

 

[che.283]

I checked the coil plug coming from the ignition module and there were two different readings, one side was cranking at .34 volts and the other was cranking at .62 volts, so im taking a guess and saying that the voltage is being restricted by the module causing the coil not to have enough signal from the module to spark?

 

[Gianni]

I'll be able to test mine on Friday and compare if u like. Unless someone can tell I before hand

 

[che.283]

Guys thankyou very much for your input, it was the ignition module as suspected causing the problem, so it's big smiles here
Cheers guys for your help couldn't be more grateful!
Gianni cheers for the offer mate, all good now B)
Matty

 

[Gianni]

High five