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1999 Bonn,the car runs for about 15 mins and shuts down,replaced ignition mod,cam/crank sensors,filters, fuel pump (3) times,because it seems as though after it shuts down and I try the key agian there is some sort of drain,could all 3 new pumps of been bad?Please help
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If you hold the pedal to the floor it puts the fuel system into Clear Flood Mode. This prevents the injectors from firing and lets the already present fuel burn out. Now if this has to be done on every short trip you probably have a leaking injector.
Does the vehicle seem to crank slowly or stop and then crank when this happens?
Seems to me that I've run across this problem 3 or 4 times over the years on different cars. Problem usually comes down to either fuel system, electrical system (including sensors), or the coolant system (including sensors). I ran into this most recently on an '89 Escort. Wound up replacing fuel pump relay, ignition relay, TPS sensor, ignition module, coolant temp switch, coolant pump (and timing belt while I was in there). Fixed a couple of engine grounds and a couple of misc things. Point is that there is probably more than one item at fault.
Could be fuel pump is going out. Its getting hot not working properly and when it cools down it works right again for a short period. Ive seen this happen several times.
Could be a problem in the ignition circuit. Check or test coil and ignition module-one of them may be shutting down or shorting out when they get hot. Verify by checking for spark at a plug wire immediately after it shuts off: if no spark, it is an ignition problem. Besides the coil and ignition module, other possibilities are the crank position sensor, cam position sensor, ecu, the ASD relay (automatic shuit down relay-it's in the power distribution box under hood). If that relay fails, all power is cut to coil and fuel injectors, and maybe the fuel pump also. Good luck.
car shuts off when it gets to normal operating range. it takes 10-15 minutes to reach normal range. causes: low coolant, failing coolant tempurature sensor, air in water pump, check the coolant temp. sensor. if it is bad it will send wrong info to engine when hot, and shut it down. ITS WORTH A TRY!! good-day!
On some chevys the oil pressure sending unit closes the circuit to continue the fuel pump to run after start. In the event of a wreck ,the car stops running thus no oil pressure thus turns off power to the fuel pump .A safety to help prevent fires. When you first start the car, the computer turns on the fuel pump for about 20 seconds just enough time to start and allow the oil pressure sending unit to close the circuit to allow it to continue running. when the car car has NO oil pressure or the sending unit fails ,it will start then shut down..as many times as you try to start. replace the oil pressure sending unit and secure a good conection. Dan
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