On a 308, the food well is conveniently placed underneath the shifter gate. It should be cleaned at every belt change.
OP did fix the problem -- according to his profile, he sold the car! No longer his problem. In my experience with older cars, a lot of electrical problems can often be traced back to bad grounds (I'm NOT talking about coffee grounds, so as not to continue the "food" discussion). I would start by checking and cleaning the negative battery terminal, the negative ground cable (change it if it looks at all corroded), cut-off switch/connector in the negative line, negative mounting point to chassis, etc. There are several threads about problems with the Digiplex ground wires in the QVs. I'd check those threads and clean up and improve those grounds. Make sure the grounding strap(s) from engine to chassis are in good condition and that mounting point on chassis is bare metal. Beyond that, the obvious -- wires, plugs, distributor caps, rotors, plug extenders, water in the spark plug wells, fuel filter, clogged injectors, vacuum lines, thermo switches. According to Occam's razor, it is likely the simplest answer that is correct. So start with the obvious and eliminate those things first before getting into the more complex.
This assumes people can see whats in front of them! In "old" Ferraris-from a 275LM to a Dino 246...you ALWAYS start with ignition-fuel system is ALWAYS the last thing you TOUCH... in intermediate era cars-CIS K-Jet(in this case really early without the benefit of o2 sensors), it is factually , exactly opposite: The FIRST thing you do before chasing every electrical connection in the harness is that you CHECK YOUR PRESSURES with Bosch CIS fuel guages-PERIOD ESPECIALLY with a condition which so clearly indicates A TWO TIERED OPOERATIONAL CONDITION BASED ON TEMPERATURES! I'm guessing that only 1-2 posters are actual practitioners of the trades...everyone else is clouding these sorts of queries by guessing, or, I heard my brothers buddy at the summer home had the same problem... In short-TEST....don't guess....or you may end up spending to the point of disgust, usually resulting in a quick sale to dispose of the car....sad, but all too often true... CIS running problems? GUAGES, guys, GUAGES.... PS-overvoltage relays only come with lambda, and usually with ABS....
Ok - I am going to check the grounds etc. I just bought the car - was running ok and brought in for major serrvice when Ferrari completed - They ended up with the same problem. I have car home but going back next week as they have to find what they did or what went wrong wile they had it...
+1 I had the WUR connector overheat on my 2v Injected car and it ran real goofy until it warmed up thoroughly. This took a long time - I recall at least 20 - 30 minutes. Troubleshooting this took a bit of time, but the repair wasn't too terrible. Just had to find those connectors and take apart the WUR to replace the connector. Big difference!
Problem solved. They changed fuel pump and accumulator. Cleaned injectors and fuel distributor. Replaced plugs again. Car running excellent.
