OzVMX Forum

Clubroom => Tech Talk => Topic started by: jake57 on June 22, 2013, 03:50:34 pm

Title: PVL ignition
Post by: jake57 on June 22, 2013, 03:50:34 pm

i have a new pvl that has a very weak spark. Is there any way to check the ignition
thanks Jake

Title: Re: PVL ignition
Post by: 3858 on June 22, 2013, 04:07:56 pm

How did you determine it has a weak spark?   :)

Title: Re: PVL ignition
Post by: Montynut on June 22, 2013, 04:16:01 pm

The most likely cause is a bad earth also the PVLs do have a low spark at very low speed (kicking speed) but a fat strong spark once at idle or above.

Title: Re: PVL ignition
Post by: jake57 on June 22, 2013, 04:30:23 pm

 thanks Monty that is what the problem is
it only just sparks when i kick it over by hand 

Title: Re: PVL ignition
Post by: 3858 on June 22, 2013, 04:47:01 pm

Mont. is right on both counts but I was going to take you there more eventually.


To answer the second part of your question is to use a Peak Volt meter on the coil and check for Ac voltages of around 150.


No one has a PV meter unless at a shop but a Multimeter averages the sine wave and may show about 70vAC on kick over... connect it to the coil input wire and earth...

Fitted two PVLs last week and a pretty easy system..

Title: Re: PVL ignition
Post by: jake57 on June 22, 2013, 06:59:58 pm

thanks 3858
will check tomorrow

Title: Re: PVL ignition
Post by: Freakshow on June 22, 2013, 10:11:14 pm

Don't use a resistor plug god a start.  Use an egv

Title: Re: PVL ignition
Post by: Montynut on June 23, 2013, 12:07:47 am

I think you will find that the PVL instructions specifically say not to use an 'egv' plug from memory. A resistor plug is OK but not the best. It depends on the PVL is it analog or digital?

Title: Re: PVL ignition
Post by: Montynut on June 23, 2013, 12:22:30 am

Quote from: 3858 on June 22, 2013, 04:47:01 pm

To answer the second part of your question is to use a Peak Volt meter on the coil and check for Ac voltages of around 150.


No one has a PV meter unless at a shop but a Multimeter averages the sine wave and may show about 70vAC on kick over... connect it to the coil input wire and earth...

Just to clarify that a multimeter does not average the AC wave form as the average of any sine wave is zero it actually measures the RMS value which is the 'root mean square' of the wave which is .707 of the peak value. so if you measure measure 70 volts on the multimeter (RMS) multiply by 1.414 (for a pure sine wave) to calculate the peak value. Not trying to be a smart arse just thought I would clarify as electrical stuff is sometime difficult to explain.

Title: Re: PVL ignition
Post by: SON on June 23, 2013, 04:27:03 am

Quote from: jake57 on June 22, 2013, 03:50:34 pm

i have a new pvl that has a very weak spark. Is there any way to check the ignition
thanks Jake

Jake, to what motor have you mounted the PVL ?
And what tracks / usage do you intend ?

Title: Re: PVL ignition
Post by: jake57 on June 23, 2013, 12:05:56 pm

Jake, to what motor have you mounted the PVL ?
And what tracks / usage do you intend ?

problem solved .......just have to kick it harder

Son  7yz400e
dirt track & natural terrain mx