Bogging under Acceleration when warm
#1
Bogging under Acceleration when warm
Been having this never ending battle for the last year.
SC400 is bogging sometimes under load (50%? or more throttle) when its warm or near warmed up.
Runs better when its cold
Wastes gas like no other.
Occasionally get MAIN O2 Sensor code even after replacing both 2 times... it still comes on.
Rotors, Cap, Wires, Coils, Plugs were done recently, 2 years ago I got a new coolant temp switch.
Any ideas?
Matt
SC400 is bogging sometimes under load (50%? or more throttle) when its warm or near warmed up.
Runs better when its cold
Wastes gas like no other.
Occasionally get MAIN O2 Sensor code even after replacing both 2 times... it still comes on.
Rotors, Cap, Wires, Coils, Plugs were done recently, 2 years ago I got a new coolant temp switch.
Any ideas?
Matt
#3
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Would you know what those O2 codes are for? Too lean? Too Rich?....etc...
If not, get your hands on a wideband and see where your afr's are at under different loads and rpms. Knowing what end condition set off your O2 codes will help.
If I had to take a guess, I would say check ecu and maf.
Good Luck Matt,
David
If not, get your hands on a wideband and see where your afr's are at under different loads and rpms. Knowing what end condition set off your O2 codes will help.
If I had to take a guess, I would say check ecu and maf.
Good Luck Matt,
David
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So essentially your problem arises when the car goes into closed loop...when it starts reading information from the O2 sensors.
Check out this thread:
https://www.clublexus.com/forums/per...mely-rich.html
It's worth a shot and it definitely helped me out.
Check out this thread:
https://www.clublexus.com/forums/per...mely-rich.html
It's worth a shot and it definitely helped me out.
#7
Interesting, I already replaced it once due to a completely failed ECU... However, white smoke, I thought it was vapor in the exhaust, really rich under idle... I hate to even do it, but I will try my friends ECU on my car and see...
If its really the ECU again... MS3 for me.
If its really the ECU again... MS3 for me.
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