I'm usually able to sort out most problems by myself but I'm hoping the collected wisdom might throw up a few pointers to what might be wrong with my son's 916. It's a '94 Strada with the P8 injection. This problem has been ongoing since last year but since he also has a 1098 and works off shore, work on it has been somewhat intermittent. Last year, after a rebuild to replace a couple of bent valves in the horiz cylinder (caused by him forgetting to fully tighten the tensioner pulley) it started to misfire once the engine was warm. The first thing I did was to change the coolant sensor which made no difference. I then checked the TPS setting, it was fine. Next we swapped the crank sensors with the ones from my 907ie. That made no difference either. We then swapped the coils with the ones from the 907. No difference. We swapped the ignition amplifiers which made no difference nor did swapping the TPS. To date we have changed; The plugs Both relays associated with the injection/ignition The coolant temperature sensor The air temperature sensor The air pressure sensor Both timing sensors The coils Both ignition amplifiers The EPROM The TPS We have tried it with the regulator disconnected to ensure a clean supply with no voltage spikes. We have also double checked the valve clearances, cylinder pressures and the cam belt timing None of the above has made any difference. :Banghead: The only thing left is the ECU itself. Has anyone got a P8 ECU that they'd be prepared to lend me? I'd pay all costs for secure carriage. I'll probably find that makes no difference either and the problem turns out to be something stupidly basic. Son is off to work for the next 6 weeks, so the next instalment will be when he comes back at the end of July. Any ideas would welcome.
A lot of help you lot were! The problem has now been solved. It turned out to be a bad wire in the loom between the Ignition amplifier and coil to the horizontal cylinder. By-passing the wire cleared the fault. The wire in the loom is either fractured with perhaps only a strand or two remaining or there is corrosion somewhere. Either of these will create resistance which will create heat and more resistance as it heats up, so that the coil isn't getting enough current. Come the winter we'll strip back the loom, find the fault and repair it properly.
+1 748 High Temperature Problem | Ducati Forum Probably best to stick to asking which oil to use or how much air to put in the tyres :Banghead:
