7th August, 2002 - I think the most likely culprit is the HT side of things. i.e. HT leads, rotor arm and distributor cap. Followed by the DME relay; all of which has been already suggested. In older cars, as all of ours are now becoming; faults of this nature are often caused by a collection of things, as you will have gathered from Sean's advice. In addition to Sean's words of wisdom; the two flywheel sensors have connectors on a bracket at the back of the inlet manifold. Cleaning these contacts with 'contact cleaner/lubricant' can improve the ignition on start up as the voltage produced by the sensors is relatively small. Dirt/corrosion here can cause the DME computer to not register the sensor signal at low RPM. The low tension side if the coil is triggered by the DME computer. This signal passes through a connector block adjacent to the brake servo unit. The same treatment of these terminals will reap huge rewards in terms of spark strength, as the coil effectively multiplies this voltage. So half a volt lost here equates to a greatly diminished spark. Just a couple of cheap and easy things to try, while tinkering with the car, and enjoying these warm summer evenings. (Or is that only me?) Jon.

7th August, 2002 - When the engine is turning over look at the tachometer. If the tachometer needle moves, then the low tension side of the ignition circuit is making & breaking, so you should be producing a spark unless there is a coil or leas problem. You can at least rule out the flywheel sensors. Then listen for the fuel pump which should kick in once spark is generated (DME relay), and check for other fuel problems. If the tachometer needle is not moving, check sensors, etc., for the DME control circuit. All the best, Sean Dunne

7th August, 2002 - I had a similar intermittent problem a while back but it never recurred after my DME relay failed and had to be replaced. If anything goes wrong on your Porsche always suspect the DME relay first!!!! Try swapping relays - it is a good idea to always carry a spare in the car anyway! Eric