Hei spark tester for testing coil pack

Does anyone know were i can get a high energy ignition spark tester in the UK, it looks like a spark plug with a spring clip on the side, from what i've read this is will test my coil packs and will tell a good coil pack from a weak one on its way out.

I can only find them for sale in the US and i've been round the local parts shops without luck, anyone selling them in UK.

is this the kind of thing

270mm Ignition Spark Tester - Test Car Spark Plugs, Ignition Lead: Amazon.co.uk: DIY & Tools

http://www.amazon.co.uk/Thexton-THX404-Adjustable-Ignition-Tester/dp/B0002STSBM

http://www.ebay.co.uk/itm/KD-Tools-...icle_Parts_Accessories_ET&hash=item2ecd1fbe40

Thanks for the reply, i already have the first one but have read that it's not reliable as it will light even if the coil pack is weak.

This is the type i was trying to locate in the UK, if i can't find one i'll order one from the US.

digi said:

Thanks for the reply, i already have the first one but have read that it's not reliable as it will light even if the coil pack is weak.

This is the type i was trying to locate in the UK, if i can't find one i'll order one from the US.

Click to expand...

the third link is the same by the looks of it but is from Germany , abit closer, lol

here u to found one in the uk

KD Calibrated Ignition Testers Spark Plugs HEI Systems | eBay

This kind of coil tester has a limited use for testing the coil output. It may well spark well in open air, but not when the plug is subject to compression of the engine.
The best coil test is to substitute it and see if the running improves.
The ECU will know what plug is firing and what one isn't. This is why code readers are so useful.