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When light is blinking not good exhaust system usually catilatic converter blockage in system. Causing the hesitation. Go to autozone and get a computer reading obd that will tell you. Be careful driving it
I would start with ect. That is the engine coolant temperature (sensor). That sensor monitors the coolant temp and tells the computer to increase engine RPM so the engine warms up faster. In the mornings when you first start your car and it idols high, that sensor is sending that information. If you have a code for this sensor start there.
It might be your coolant temp. sensor-not the sender for your dash gauge, but the sensor that tells the computer the engine temp. I'd also replace the spark plugs. If they have a sooty, black coating your engine is running rich. Does the engine light still come on? If same code, you need to check that circuit out more fully.
How long since overall tune-up? Use a gage and check proper fuel pressure, key on engine off. vin K 48--55 psi. Also, check that the fuel pressure will hold for bit, with the key off.
Check fuel trims when problem is ongoing, see if trying to add or remove fuel? If temp related check the coolant temp sensor.
Over-fueling on a hot engine can make it hard to start. Pushing the pedal to the floor should put it in "clear flood mode" and help it to start.
Could be other issues?
p0300 is usually a random cylinder miss-fire code, and i think that p0117 is coolant temperature sensor? Try replacing the sensor, could also be the reason for the other code, as a malfunctioning coolant temp sensor will affect engine timing.
P1128 - Long Term Fuel Trim Multiplicative System Too Lean. The ECM
will set a code and the MIL will turn on if the long-term fuel trim
value goes from 10% to 15% lean for 30 seconds during two driving
cycles when the following conditions are met: 1.- Engine loads exceeds 1.8 milliseconds. 2.- Engine coolant temp. is above 158F (70C). 3.- Canister purge system is not operating. 4.- Mass air flow is less than or equal to 5.5grams per second. 5.- Engine speed is below 1000RPM.
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