900ss

Can a rev counter cause a high speeed misfire ?
Talking pre 80's electrics here aswell, so no fandango modern digi stuff
Ever known it happen?

kjc300

iTrader: (1)

Prob more than likely the item that sends the signal to the rev counter - bit like the ign amps were doing on my escos.

900ss

Taken straight from the coil I believe?
Tried diffo coil aswell as a brand new amp.
Just wondering if a rev counter can cause a fault?

kjc300

iTrader: (1)

I take it the rev counter is monkeying around when the fault occurs??

zetecapri

well if its misfiring the revs arent gonna hold steady ?

MK5RST

sounds like its shorting out somewhere if the rev counter is playing up when it missfires, check all plug leads arent shorting out onto head

tabetha

YES WITHOUT A SHADOW OF A DOUBT THEY CAN CAUSE MISFIRES, or TOTAL stoppages.
tabetha

IANS2RST

iTrader: (1)

pre 80's escorts eg rs2000 mk1/2 used an induction loop for the revcounter & this was prone to causing problems

stu da rude

Disconnect the feed to it and see if it still misfires, this is a common problem with stuff that uses an ignition amp, the rev counter usually isnt the problem, but lets you know the fault is eletrical rather than fuelling. probably..

What car is it?

900ss

Cheers
Yep the needle flickers about when it misfires
I'll try disconnecting it next just to see

Car is a Datsun 260z