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Old 02-01-10, 12:44   #1
Tomo's Avatar
Join Date: 15-04-04
Location: Melbourne, northernish
Car: vl berlina turbo, vx ss
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Igniter, Power transistor - Haltech whats the go

wiring up a haltech e6x onto my vl
anyway few quick questions
wheres the igniter on the rb30 is it called the power transistor(thing next to the dizzy) or is that something else, if so what does it do.

Is the igniter built into the coil?
Struggling to get my head around it refering to the vl wiring diagrams and then trying to cross reference that too the haltech diagrams/information
is proving difficult at best.

Im guessing that i connect my ignition output from the haltech to the igniter, then from the igniter to the coil and to positive.

any help would be great because im struggling.
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Old 02-01-10, 18:33   #2
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Join Date: 27-10-06
Location: Melbourne, eastern burbs
Car: white VL berlina (nothing special)
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the power transistor next to the dizzy controls the energizing off the coil (the spark being built up to do to the dizzy cap) the ECU controls when the power transistor supplies power to the coil to build up spark

the coil is only there to build up spark doesn’t do any other job just that.

From what I can make out what you need to do is hook the ignition out put off the ECU to the vertical pin off the power transistor then you need to hook up the horizontal pin of the power transistor to the negative off the ignition coil and supply the other terminal off the coil with 12v positive the power transistor is earth out through the mounting which needs a clean connection with the distributor housing

It should work like this the ECU will earth out the power transistor or supply it with a small voltage (either way don’t quite know which one) to make the connection internally inside the power transistor (like an relay switching on) earthing out the coil generating the spark.

let me know what happens?
Originally Posted by DIXIE
build it based on what YOU want it to have, go like, sound like, and look like.
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Old 03-01-10, 11:38   #3
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Join Date: 01-11-03
Location: VIC, Ballarat
Car: RB30DET sold...hello VZ SS
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What he ^^ said.

Think of the power transistor/ignitor as an electronic relay. It uses a low current output from the ECU to switch a high current device like the coil. Being electronic, it can switch much faster than a normal electro-mechanical relay.
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Old 03-01-10, 16:57   #4
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Location: Melbourne, northernish
Car: vl berlina turbo, vx ss
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all sorted thanks guys, large weekend means the old brain hasnt been working the best... doesnt lend its self well to trying to figure out car faults
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Old 15-11-11, 09:25   #5
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Join Date: 04-01-06
Location: VIC, Melbourne
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VL Power Transistors (VL Commodore)
MAKE: Holden
MODEL: VL Commodore
SUBJECT: VL power transistors

The VL power transistor (and other similar types) is mounted on the side of the distributor and its function is to switch the ignition coil to produce spark for the system. It responds to output from the engine management ECM which controls ignition timing and dwell.

The power transistor has three connections:
Base (B) - Connects to pin 5 of ECM
Emitter (E) - Connects to ground
Collector (C) - Connects to negative side of coil


The control pin (base) is connected to pin 5 on the ECM. The ECM generates a pulse to turn on and off the power stage (approximately 2 volts). Which in turn creates the primary ignition waveform. When the voltage is high, the transistor sinks current.

Testing the power transistor can be done on the vehicle:

To test when no spark:

Put a spark gap in coil lead.
Pull the ‘T’ plug off the power transistor, turn it upside down and slip back on to the connector. The bottom pin should now be exposed (B terminal).
Turn ignition key on to provide +12 volts to the coil.
The transistor can now be manually switched because control from the ECM has now been disconnected.
Connect a LED tester to the positive battery terminal and the other end of the LED tester can be lightly tapped onto the exposed connector (base) of the power transistor. Spark should now be evident (LED tester is used for current control).
Do not directly connect battery power to the base of the transistor, only use a LED tester with appropriate current limited resistor.
If the spark is still not evident, Injectronics suggests testing the coil, coil lead and power supply to coil. If these test ok then the power transistor may be faulty.
Originally Posted by deanoVLCT View Post
Bloody love hate with vlts dead set wanna kill it sometimes

Last edited by MxPx VL; 15-11-11 at 09:27.
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