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Rb20det - No Spark After Resistor Pack Installation

oburton

By oburton,
in Engines & Forced Induction

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oburton Rookie

oburton

Posted
Posted

I have just finished wiring in my resistor pack for use with VR4 440cc injectors. I have fuel but no spark so i assume i've stuffed something up somewhere. The coil packs have power, how do check that the igniter (transistor) pack is getting/sending a signal?

I am running a gtslink computer and the car was running fine before the injector upgrade.

Cheers

abu Grand Master

abu

Posted
Posted

I had the same problem

What I did was check each wire running to the resistor pack with a multimeter

With the ignition on, earth the multimeter (battery or what ever) and touch the other end to the wire your checking, should show +12v

Easiest way is to stick a sewing pin/needle into the wire your testing, then touch the positive end of the multimeter to the pin/needle

You need to identify weather the the resistor is getting power, if not then work backwards

Check the resistor, then check the wire you hooked up for the power, if there is still no power there check the power wire on the original loom and make sure its the correct wire

If the wire has power then check your connections/soldering. As the wiring does sit a bit tight and if its heavily taped, theres a chance the connection/some connections could have broken

Also make sure the resistor pack is good, not sure how you can test the pack it self

Hope that makes sense

oburton Rookie

oburton

Posted
  • Author
Posted

"You need to identify weather the the resistor is getting power, if not then work backwards

Check the resistor, then check the wire you hooked up for the power, if there is still no power there check the power wire on the original loom and make sure its the correct wire"

cheers, but the resistor pack for the injectors has power and the injectors are working, however it's the spark that i'm missing so i'm wondering about how to check the igniter/transistor pack wiring

oburton Rookie

oburton

Posted
  • Author
Posted

I have done some more work into finding out whats wrong, so far this is what i've found:

Coil packs have power

CAS has power

There is continuity through the loom from the CAS to the computer to the transistor (ignition) pack to the coils

During cranking the computer is putting out 2-3V to the transistor pack but the book says it should only be .2-.3V. Can anyone confirm if either of these values are correct?

  • 2 months later...
Hunting Lions Contributor

Hunting Lions

Posted
Posted

check to see if the ignitor pack is earthed properly.

btw my car is having spark problems atm i ve narrowed it down to a computer problem but i got a lend of some coilpacks and an ignitor pack and my car wouldnt even start with the replacement ignitor pack.

i seen it taken off another rb20 tried it on mine and wouldnt even start b4 taking it back and puttin it on the other car watching it start quite happily first click.

  • 2 weeks later...

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