I seem to be getting a misfire at about 5000+pm in third and forth and my rpm needle is very jump lately, seems to be very erratic even when cruising at a steedy speed its fluctuating up and down the dial face?

 

What plugs and what gap ?

Could be the multi plugs on the bulkhead.

 

good old cossie missfire ,cannie beat it

 

 

Clean the earths on the engine!

Also try and giving the ignistion Module a good clean. (it's attached to the inner wing passenger side, big shiney silver thing with connector)

 

yes give all earths a good clean,check spark plug gaps and maybe change coil for a Grp A jobby

 

Group A coil is cheap so get one in anyway, saved me from the misfires when I did.

 

the needle jumping is caused by either the TDC sensor not working quite right,
or more likely in this case, the Multi plugs that sit just above the engine
on the bulkhead in the engine bay.
my car was doing exactly this before i cleaned the plugs!!

but as Smit and others say. the earths Will do a lot for you too!

 

CosRep - Any luck?

 

bin the connectors on the bulkhead...and soldeer al the correct wires to each other...

 

I've cleaned the connectors on the bulk head but no luck with the tacho needle, I've orderd a grp A coil, new ignition module and motorsport leads and I'll check all the earth's to the engine, hopefully sorts out the misfire. Its NCT testing time soon (Irish equivalent of an MOT).

 

try changing the ignition module located on the passenger inner wing between the strut top and battery buddy