hi guys, seem to have an issue with plug 4 on the car. When cold the plug is non existent and only seems to run on the other 3, but once warm it kicks back in. Any ideas on what may be causing this, its still running mfi. The injectors and plugs where checked and hopefully will be checking the metering head today. anyone had similar issues with thers? thanks

 

have you checked for damp in the dizzy?
also check rotor and cap, they may just need replacing, not expensive at all, about a tenner.

 

all 3 of my rst's + my cab have done this an seemed to be rotor an cap, only happens on cold damp mornins or to me it did

 

cheers for the replies guys. I'll get this checked over, the car's at grove at the moment getting some other bits done, not sure if mark has check the cap or rotor arm yet. Will keep you all informed.

 

Cold start valve on the inlet manifold, could be the problem

 

It is also classic of a dud plug, why not swap no 1 and 4 around and see if problem swaps also.
tabetha

 

hi mate, i had changed the whole set over for some decent plugs only to find no change.

 

right, had an update, its piston 4 which drops , not the plug and the car gets very tappety, suspected issue with the tappets as the spark appears to be fine, could it be dodgy tappets failing when cold? Resulting in piston 4 not functionin until warm?

 

Could also be a cam on its last legs.

 

ouch, didnt think about the cam! Lets hope its not!

 

jus an update, turned out to be the tappets nw running much better on start up