a 1984 500SEC. It wont start... New battery, coil, distributor cap, HT leads, rotor arm, fuel filter - nothing Engine turns over as normal, just wont fire up. Theres voltage at the coil, fuel in the engine. I've bypassed the £400 immobiliser curcuits to the ignition and fuel system (too damn easy!) Sometimes the engine will fire up but as soon as you disengage the starter, it stalls. The problem has got progressively worse. Any ideas? Save me from the pink Proton 1.5 thats for sale near me for £95 - tax and MOT'd!