Please can you help?
Hi all, First things first... This is the first time I've used a forum so I hope I don't screw it up? I've bought a 1990 Sierra 2 Litre DOHC, which is fine most of the time! But when it gets damp or wet it wont idle, It just dies as soon as the clutch is pressed or taken off load !! It restarts straight away and as long as throttle is used it's ok. Also it develops a misfire and wont pull. I'm sure this is electrical- I've changed all the usuall things, plugs,rotor arm,dizzy cap, H T leads,coil etc,etc...Still no cure..When it's dry no problem. Is this a common fault or have I just bought a Lemon!! I would be grateful for any ideas ? Thanks for your time..