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Bad coolant temp sensor making ECU think engine is still cold, thus running rich, as if choke is on. There are two temp sensors, one for dash gauge (one wire) and one for the ECU (two wires). You can remove it and test with voltmeter by placing unit in hot or cold water to compare readings.
misfire cold.
ever tune it up. sparkplugs can fail when cold and rich conditions
are present(normal for cold)
ever seen the 60k service points lists it the glove box operating manual
id bet its due to not doing service.
am i right?
no engine size stated. so no details guessed.
Many things could be your problem
1- coolant temperature or wiring defect
2- Cooling fan not working
3- Need to retrieve any engine faulty code with a scanner.
4- With a scanner look for any data that is not normal.
See a good auto technician
Gas or diesel having same problem, I'd start there to confirm fuel pressure . It may be pump running partially when cool, but when it heats up (the pump) it may be cutting out pressure wise. Not uncommon for a fuel pump to pump good when cold, then die once pump heats up from running. Still makes noise, but isn't supplying any or enough pressure.
seem like you got the same problem as my scion xa, check the fuel pressure regulater. bad regulater some time smell like leak gas. auto zone might cause you about $80.00.
Most likely you have a bad Idle motor which is a small motor mounted on the intake
manifold. If the motor can run better with your foot on the gas but
dies if removed then it is probably this. This motor is controlled by
the OBDII computer which gets it's control signal from the temp sensor
which is located either on the radiator or engine block (which could
also be bad), if the electric fan (if equipped) turns on then this is
not the problem part, but the idle motor is. Another possibility is
that you have some bad /cracked vacuum hoses which should be checked
for first, before replacing the idle motor.
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