HT leads surpressed or not + resistances

[chrisdurham]

Hi Guys,

OK after a while trying to track down the source of the interference on my rev counter. I think I've finally done it.

Put all the original parts back in it from when I bought it. Then started to build back up from there.
Things its OK with:
1)new std plugs
2)new plug extenders - these have very little resistance ~ 5 ohms. The originals had 5K ohms.
3)new alternator

Now when I put the new dizzy cap on (non branded) the rev counter starts to flick a bit and when the new bosch ht leads are put on, the counter is all over the place again.

The original HT leads do have surpressed written on them but the bosch dont. i did assume all new ones were surpressed?

So I was going to try and find a lucas dizzy cap and arm and some sort of HT leads that are surpressed and hopefully this should be it?

[finestjammy]

I have a bouncy rev counter too. I'm assuming it's as a result of the new extenders and the HT leads. Apart from being annoying, does this actually cause any running problems?

[blitzracing]

Far as I know all Bosch leads will be resistive, but you can check them with your test meter end to end. The longer the lead the higher the resistance, and you are looking for values in the K range ohms wise. You can fit resistive plugs if you want more resistance to replace the loss due to the low resistance plug extenders. As for damage- not you are unlikley to do any as long as they are resistive leads. If you ever use copper leads (not that one would normally), they blow things up- I damaged two rev limiters before I realised you cant use them with electronics.