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Sounds like the engine is starving for fuel. You might try changing the fuel filter. It also cold be water in your fuel tank. Try putting some dry gas in the tank.
I have a 1999 TERRANO QD32ETI engine and the problem which the local agents and private mechanics cannot solve is that when it's on the highways the engine performs well; that is it accelerates perfectly. However, when the vehicle comes to a dead stop, and you go for a quick take off the engine cuts out; it restarts quickly; now,when you make a slow acceleration after stopping the engine does not stall, but this can be a dangerous situation when crossing traffic on the highway or moving off from the traffic lights. We checked the computer, fuel pump and the injectors; our opinions differ and somehow we feel the problem may be the fuel pump. We would appreciate your comments. Our many thanks for your kind assistance. Thanks Tony.
This is a fuel pump issue. i would replace it and the lines as well.also, a minor tune up wouldn't hurt as well. wires plugs distributor cap points etc...
You could have a defective fuel pump, when they go bad they can draw enough current to fry the relay contacts, so I would suggest you test how many amps the fuel pump is drawing, I have fixed this very issue of repeated relay replacements, it was always the pump was shot.
Are you quite sure it is not overheating? Your mention of heavy traffic, ie. stop and go, would tell me that your radiator fans are not working. I had a car with bum electric radiator fans. It worked fine if it was moving a lot. But in slow traffic, it would get warm enough to have a vapor lock or something without setting the engine-hot light.
You have one of two very common problems.
Number one may be a stuck open EGR valve
Number two would be a failing Idle Air Control valve (IAC).
Try this: Open the hood & locate the EGR valve, close to the firewall, behind the intake. Find & take with you a small hammer. The next time that it happens, open the hood & tap on the EGR valve. If it is sticking "open" the tapping may dislodge the carbon particles that are keeping it open.When the EGR valve is open, exhaust is getting into the intake at idle, and this will def stall out the car.
There is no repair to the IAC valve, it would need to be replaced if it is bad.
One of these two scenarios will cure your problem, I see it every day.
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