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@ KZ 259
The problem is ongoing for over 1 year, slowly getting worse.
I was thinking of a possible crankshaft/camshaft sensor issue… but that would mean that the fuel level would be a genuine coincidence… still it’s possible.
There is no gas/fuel smell around the vehicle.Thanks for the reply Eric!
I’ve already looked at the coolant and air temperature sensors.
They generally have similar values (maybe 2-3 degrees Celsius difference)
I would think they look alright.The O2 sensor; I’ve checked them as per one of your videos ( this one: P0420 How To Diagnose A Bad Catalytic Converter -EricTheCarGuy ), looking for fast changing of the firs O2 sensor.(i don’t have a graph of that at the moment -but i will tomorrow morning) to me it seems to be ok. wen i press the accelerator pedal the sensor’s output increases quickly… and then when the ecu works out there is to much fuel it decreases as a response.
Anyhow I don’t think the O2 readings would influence the starting, because the ECU does not take it into account until the engine is up to temp.
Thanks for the reply Eric!
I’ve already looked at the coolant and air temperature sensors.
They generally have similar values (maybe 2-3 degrees Celsius difference)
I would think they look alright.The O2 sensor; I’ve checked them as per one of your videos ( this one: P0420 How To Diagnose A Bad Catalytic Converter -EricTheCarGuy ), looking for fast changing of the firs O2 sensor.(i don’t have a graph of that at the moment -but i will tomorrow morning) to me it seems to be ok. wen i press the accelerator pedal the sensor’s output increases quickly… and then when the ecu works out there is to much fuel it decreases as a response.
Anyhow I don’t think the O2 readings would influence the starting, because the ECU does not take it into account until the engine is up to temp.
Forgot to mention: at one time i replaced my pump with one from another bravo ( same engine, same pump) … issues did not go away.
( replaced it in the evening, drove it, and in the morning it sputtered again – no change)I know it’s a strange one… that’s why i posted.
If i can get that guy with the Bravo to lend me his car for a day.. i would replace all the fuel delivery system ( minus the lines) ..his car is working fine.Forgot to mention: at one time i replaced my pump with one from another bravo ( same engine, same pump) … issues did not go away.
( replaced it in the evening, drove it, and in the morning it sputtered again – no change)I know it’s a strange one… that’s why i posted.
If i can get that guy with the Bravo to lend me his car for a day.. i would replace all the fuel delivery system ( minus the lines) ..his car is working fine.
