Cylinder 3 is not firing after washing motor

[King_berald]

went to the carwash today to try and get rid of all the grease on the motor and now its runing like shit. unplugged the injectors 1 by 1 to work out which cylinder was missing and ive narrowed it down to cylinder 3. changed the spark plug, and changed the O-ring on the injector and still nothing. no error codes have come up.

anybody got any ideas???

[noddycommodore]

Spray a bit of wd40 or what ever you have into the spark plug. It will get the water out. Check for sparking from that spark plug lead also

[Darcon666]

Coil pack or lead could be the problem?

[King_berald]

how do i check to see if theres spark??

[noddycommodore]

Pull the spark plug lead off and sit it near a metal part of the engine where it won't move ( don't hold it!!!) there is enough zap there to kill a man. But then start the car you should see a spark or hear it zapping

[agrsv8]

i can will tell you right now to change the coil pack and DFI module. I would even investigate spark. $$$ on it

[King_berald]

can you swap 2 coil packs around? or do they have to be used to their corresponding numbers?

[Darcon666]

...............( don't hold it!!!) there is enough zap there to kill a man.

First part correct and how to test, but this above is not possible... there are not enough AMPS in the coilpack(In a cars electrical system) to kill a human being, yes the VOLTS are high... it's amps that kill.

Having said this if you are using a "magneto" to generate the electrical spark then they could kill an elephant.

[King_berald]

swapped the dfi and coils from my vx...fixed the problem....so the problem is either coil pack or dfi....thanks guys..

[noddycommodore]

First part correct and how to test, but this above is not possible... there are not enough AMPS in the coilpack(In a cars electrical system) to kill a human being, yes the VOLTS are high... it's amps that kill.

Having said this if you are using a "magneto" to generate the electrical spark then they could kill an elephant. [/QUOTE]
That is true to an extent. Commodore coil packs can give a spark upto 110,000 volts, this surge of power is enough to stop your heart for long enough to kill you, same as you don't use a defubulator (what doctors use to re start your heart) when your heart is beating.

[Hangman]

same as you don't use a defubulator (what doctors use to re start your heart) when your heart is beating.

Defibrillators are used when the hearts rhythm is erratic to shock it back to normal rhythm. If the heart is stopped, it's pretty much too late.

[Darcon666]

That is true to an extent. Commodore coil packs can give a spark upto 110,000 volts, this surge of power is enough to stop your heart for long enough to kill you, same as you don't use a defubulator (what doctors use to re start your heart) when your heart is beating.

You do know you are talking about a DC current in a cars electrical system as compared to AC with far greater Volts/AMPS... there is a difference, anywho lets just stop here.

Problem is fixed accordiong to the OP, well done /End Thread.

[wortus]

just wondering the coils primary winding recieves a pulse of current, when this current flows into the primary the magnetic field builds up and induces a voltage in the secondary which discharges accross the plug. When the current into the primary stops the magnetic field will collapse/reverse which will reverse the direction of the induced voltage and hence current so won't this make the output of the coil an AC waveform?

[bcw61]

just wondering the coils primary winding recieves a pulse of current, when this current flows into the primary the magnetic field builds up and induces a voltage in the secondary which discharges accross the plug. When the current into the primary stops the magnetic field will collapse/reverse which will reverse the direction of the induced voltage and hence current so won't this make the output of the coil an AC waveform?

Actually, in an ignition system, it's the other way around. The highest EMF produced in the secondary winding is caused by a collapsing magnetic field, when the current flow in the primary coil is interrupted.

During my time as an electrical fitter instructor, this was ably demonstrated by getting a 'victim', I mean student, to connect a 1.5 AA cell across a one Henry inductor while holding the leads. No dramas holding the leads while the battery was connected, but when the student disconnected the AA cell, the resulting collapsing magnetic field produced an EMF from hell, and gave them an extremely nasty shock. Very little current, so no damage done, apart from the hands hitting something when flying off with the shock.