Having problems starting after short drives

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discoman

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I have this problem when the engine is cold. She starts up just fine initially, but if I only drive 2 or 3 blocks (not long enough to warm the engine up) and shut it off, when I go to restart a minute or two later, she won't.
I have to depress the accelorator to the floor and hold it there and then start the engine. She'll start after a couple of seconds and i have to feather the throttle and she will sputter for a few more seconds, but then she'll come to life and be just fine. (The raw fuel smell I get right afterward is rather euphoric) If I make the short trip but I don't try to restart it right away and instead leave it for 30 minutes or more than everything is fine. If the engine is at normal operating temperatures there is no problem. It only happens when the engine is cold and I have just made a short trip.
 

joey

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Sounds like a fuel temp sensor....

Engine fuel temperature sensor (EFT Sensor)
This is another resistive sensor. Located on the fuel
rail it measures temperature of the rail rather than the
fuel. The resistance varies with changes in
temperature. The signal is used to increase the
injection pulse time when undergoing hot restarts.
When the fuel is hot, vapourisation occurs in the rail
and bubbles can occur in the injectors. Increasing the
pulse time flushes the bubbles away, and cools the
fuel rail with fuel from the tank. The fault may not be
evident to the driver, there may be a hot restart
problem. The fault is indicated by illumination of the
malfunction indicator light (MIL) on North American
specification vehicles.


Fuel temperature sensor
The fuel temperature sensor is inserted in the fuel rail
and measures fuel and fuel rail temperatures. During
engine cranking at high temperatures, the ECM
increases fuel supply, and opens the throttle disc via
the stepper motor to aid hot starting.
 

joey

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Not saying it is, but it could be a cause of your issue. Like any advise anyone or myself gives take with a grain of salt... Since I can't be there to troubleshoot, but this is where I would start. Then after that I would look at the injectors for possible issues.
 

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