Hey everyone.My truck got this strange behaviour a few weeks ago: When i stop the engine, and try to start again (hot or cold doesn´t matter) it takes about 5-15 seconds of cranking to start again. sometimes it wont start at all. but if i go down a hill and step off the clutch pedal it starts at once. I opened an injector pipe and cranked it and it got fuel immediately. So it seems like the cranking revs are to low, but they are the same as allways. So I wonder, do these fuelpumps have rpm-depending timing? As you know there is a black plastic box with three cables connected to it on the right side of the pump (the cars right side). Might that be it? I can´t think of any other possible reason for this behaviour, than wrong timing setting. I would also be happy if anyone could explain as much as possible about the electrics for the fuelsystem to me, for example what the switches with vacuumhoses connected to them, at the rear of the left valvecover does. An what te relay called "Optional Relay, beside the fuelpump relay does.