Happy new year all .sj410 1986 intermittent misfire
Posted: Wed Jan 11, 2017 10:42 am
Hi all
as above,my sj has developed an intermittent misfire. within my ability I am checking all the obvious things I hope.
Symptoms, starts easy as before and runs well, at idle no probs and picks up revs no prob, in driving every so often just hear and feel slight misfire and power loss.
Points gap checked and timing ok ( with strobe gun ),starting with cheapest have ordered new points and condenser waiting for delivery.
HT leads, points and distributor cap and rotor arm all changed 3000 miles ago, plugs also same time.
Plugs nice colour brown all the same.
Inside distributor cap all seems clean and corrosion free, rotor arm clean and dry
So the coil !
The coil is original, I have put multimeter on it and get on between low tension connectors 1.5 ohms, reading between low tension and high tension connections 8500 omhs. Are these ok ?
Haynes manual only says low tension should be 3 ohms, is 1.5 ohms close enough ?. I have no idea on these electrical things.
Realise it could be plugs or new leads or anything but checking other things first.
Everything is clean no obvious cracks anywhere.
My sj is petrol and lpg powered and has same prob on both fuels so dont think it can be carb related as the lpg does not go through the jets. of carb only through the main body ( I have really no idea on these aisan carbs !
Any thoughts or ideas appreciated
Steve
as above,my sj has developed an intermittent misfire. within my ability I am checking all the obvious things I hope.
Symptoms, starts easy as before and runs well, at idle no probs and picks up revs no prob, in driving every so often just hear and feel slight misfire and power loss.
Points gap checked and timing ok ( with strobe gun ),starting with cheapest have ordered new points and condenser waiting for delivery.
HT leads, points and distributor cap and rotor arm all changed 3000 miles ago, plugs also same time.
Plugs nice colour brown all the same.
Inside distributor cap all seems clean and corrosion free, rotor arm clean and dry
So the coil !
The coil is original, I have put multimeter on it and get on between low tension connectors 1.5 ohms, reading between low tension and high tension connections 8500 omhs. Are these ok ?
Haynes manual only says low tension should be 3 ohms, is 1.5 ohms close enough ?. I have no idea on these electrical things.
Realise it could be plugs or new leads or anything but checking other things first.
Everything is clean no obvious cracks anywhere.
My sj is petrol and lpg powered and has same prob on both fuels so dont think it can be carb related as the lpg does not go through the jets. of carb only through the main body ( I have really no idea on these aisan carbs !
Any thoughts or ideas appreciated
Steve
