[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index] 4KQ Runs then Dies?!?
My lovable '84 4KQ has developed another glitch. Does this sound familiar to anyone? It runs great when you start it cold, engine/idle is very smooth and everything copasetic. As the engine heats up, it develops a gradual miss that degenerates into severe bucking and finally an inablilty to pull any more than 1/8" of throttle without missing completly (which makes it about as fast as a Big-Wheel). Finally it dies and wont start at all until it cools down completly. The fuel pump is whining like a thing posessed at this point. I have a hunch that the car isn't getting enough fuel pressure from the get-go, but as the engine gets hot it begins to manifest itself as vapor lock somewhere in the FI system. It has a new fuel filter and the pump seems sound, at least when you first start the car. Could it be the fuel pressure accumulator is bad? The thing is the original on the car and is quite badly rusted. The car is CIS-E with an ISV and electronic differential pressure control on the fuel distributor. Thanks for any input. I just got the electrical gremlins at bay and now this!!! Alex Kowalski '84 4KQ
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