Issue: hesitates to start as if it's not getting enough fuel, any help with pressing the gas pedal immediately starts it now.
Engine was just rebuilt 200 miles ago, runs like a champ once up to operating temperature and idles flawlessly.
Background:
I bought the vehicle in Chicago, before leaving back to St. Louis I made sure the oil level was full, next morning after the trip home, the car was 3 quartz low on a 3.9 quartz sump, I realized this after starting the vehicle, it was shaking/kept dieing out, drove it to flat surface and properly filled oil, I knew I had to rebuild the engine asap.
I soon started to get issues every time I started the car, it would shake/hesitate but as it heated up the issue went away and it idle perfectly, the temperature gauge took forever to go from COLD to the next step, and then would skip to operating temperature within 10 seconds, I got CEL P0420 (Catalytic Efficiency) & P0171 (Low Fuel Pressure), and I got P0171 more frequently and P0420 only once before the engine rebuild, since the engine rebuild P0171 hasn't come back but I kept getting P0420 every 20 miles after I would reset it with a scan gauge. This morning the vehicle won't start, it was turning over but didn't want to start, wide open throttle and it started, which made me conclude coolant temperature sensor, as the vehicle heated up, it started to run normally. I replaced the Coolant Temperature Sensor and it idles much better and doesn't require wide open throttle to start the vehicle anymore but after being turned off for an hour or so, it still gets hesitation/rough start but starts much faster then before but not normal (my 01 celica gt is the point of comparison).
Items worked on other then engine:
1. New NGK Spark Plugs
2. Fuel Injector Cleaning (RC Engineering)
3. Throttle Body/Idle Air Control Valve Cleaning
4. VVT-i Solenoid & Filter Cleaning
5. Mass Air Flow Sensor Cleaning
6. New Stant Thermostat
7. Complete Coolant Flush
8. New Coolant Temperature Sensor(it significantly reduced the "hesitating" during start up but not eliminated)
What do you guys think it can be?
me and the old school mechanic have concluded that it could be a clogged fuel filter/strainer both of which are located under the back seat, on top of the fuel tank but, after reading celica forums I'm not so sure as I have read constantly that the fuel filter never needs to be replaced in these cars.
Another possibility would be that the fuel pump has become lazy (would make sense to me as it initially takes time to build pressure until it starts to run properly?).
Another could be that the Beck/Arnley Coolant Temperature ($15) I got isn't up to par with OEM coolant temperature sensors? The temperature does rise normally on the temp gauge now and the vehicle doesn't require wide open throttle to start since replacing this part.
Engine was just rebuilt 200 miles ago, runs like a champ once up to operating temperature and idles flawlessly.
Background:
I bought the vehicle in Chicago, before leaving back to St. Louis I made sure the oil level was full, next morning after the trip home, the car was 3 quartz low on a 3.9 quartz sump, I realized this after starting the vehicle, it was shaking/kept dieing out, drove it to flat surface and properly filled oil, I knew I had to rebuild the engine asap.
I soon started to get issues every time I started the car, it would shake/hesitate but as it heated up the issue went away and it idle perfectly, the temperature gauge took forever to go from COLD to the next step, and then would skip to operating temperature within 10 seconds, I got CEL P0420 (Catalytic Efficiency) & P0171 (Low Fuel Pressure), and I got P0171 more frequently and P0420 only once before the engine rebuild, since the engine rebuild P0171 hasn't come back but I kept getting P0420 every 20 miles after I would reset it with a scan gauge. This morning the vehicle won't start, it was turning over but didn't want to start, wide open throttle and it started, which made me conclude coolant temperature sensor, as the vehicle heated up, it started to run normally. I replaced the Coolant Temperature Sensor and it idles much better and doesn't require wide open throttle to start the vehicle anymore but after being turned off for an hour or so, it still gets hesitation/rough start but starts much faster then before but not normal (my 01 celica gt is the point of comparison).
Items worked on other then engine:
1. New NGK Spark Plugs
2. Fuel Injector Cleaning (RC Engineering)
3. Throttle Body/Idle Air Control Valve Cleaning
4. VVT-i Solenoid & Filter Cleaning
5. Mass Air Flow Sensor Cleaning
6. New Stant Thermostat
7. Complete Coolant Flush
8. New Coolant Temperature Sensor(it significantly reduced the "hesitating" during start up but not eliminated)
What do you guys think it can be?
me and the old school mechanic have concluded that it could be a clogged fuel filter/strainer both of which are located under the back seat, on top of the fuel tank but, after reading celica forums I'm not so sure as I have read constantly that the fuel filter never needs to be replaced in these cars.
Another possibility would be that the fuel pump has become lazy (would make sense to me as it initially takes time to build pressure until it starts to run properly?).
Another could be that the Beck/Arnley Coolant Temperature ($15) I got isn't up to par with OEM coolant temperature sensors? The temperature does rise normally on the temp gauge now and the vehicle doesn't require wide open throttle to start since replacing this part.
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