On the first cold start of the day, the car starts perfectly. If the car is warm and restarted within 30 mins or so, it also starts perfectly. The problem comes if the car is left for some time after being driven, but not long enough to warrant a full cold start.
The starter motor works fine but the car just doesn't fire. Eventually it does fire (after 10 turns+ of the starter motor) but then tries to rev too low (150-200rpm) with the battery light on (clearly not getting to the correct alternator voltage due to the low revs). It needs a blip of throttle to make it idle well and then drives fine. The throttle body has been thoroughly cleaned out.
Someone mentioned that this could be a camshaft sensor that would give funny readings when warm, but the cold start programme would prevent it being an issue when cold. When very hot, it would likewise easily start. The ignition system has also been thoroughly checked over with all plugs replaced. Any advice welcomed before lots of money is spent! Could this be an OVP relay? Apparently you can only buy the whole relay set for £192+fitting for the S320...
The starter motor works fine but the car just doesn't fire. Eventually it does fire (after 10 turns+ of the starter motor) but then tries to rev too low (150-200rpm) with the battery light on (clearly not getting to the correct alternator voltage due to the low revs). It needs a blip of throttle to make it idle well and then drives fine. The throttle body has been thoroughly cleaned out.
Someone mentioned that this could be a camshaft sensor that would give funny readings when warm, but the cold start programme would prevent it being an issue when cold. When very hot, it would likewise easily start. The ignition system has also been thoroughly checked over with all plugs replaced. Any advice welcomed before lots of money is spent! Could this be an OVP relay? Apparently you can only buy the whole relay set for £192+fitting for the S320...
