Hello Have such a problem, Have a boat with a 350 Chevy V8 EFi. The problem is that the engine in the cold start turns up perfectly and also regulates back, then everything stays OK until I start the Mascine again in the warm state. Then the engine turns in higher empty speed and never regulates back. If I then turn on again ice pair times and turn off then at some point again. hilarious but then that it also remains good?!? If it is not regulated back it also d I have not looked at this, the problems already start. I can not find an OT-gender on the engine and no temperature sensor. The injection system (by TBi, believe) is built up as follows, injection nozzles sit over the suction tube, these are completely closed by the throttle valves (in idle mode).The idling is now controlled via a small hole on the side, which leads to a kind of bypass. (because of the length in the next further)