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LS400 1995- Severe vibration/Stalling/Misfire/unburnt Fuel in exhaust
Hello Guys,
My LS400 which was running great, fell sick last couple of days. There is sever vibration on the vehicle when i stop at traffic lights when in drive mode. The rpm drops to 500. I change to Neutral and rpm jumps to 800. Consuming fuel badly. There is unburnt fuel smell from the exhaust. I connected my ELM OBD2 adapter and it read below codes. I see the check engine light flash during driving.
Clearing the engine codes doesn't help.
The entire engine and ECU were replaced around 7 months ago and car was used only for the last two months. I unfortunately do not have the previous ECU. The local mechanic said there is an issue with the below part.
Once we disconnect the hose going from this valve to engine, the vibrations smoothen out. Really don't know what part this is or its function. The valve actuates when I put back the hose. Really appreciate your help and suggestions.
My LS400 which was running great, fell sick last couple of days. There is sever vibration on the vehicle when i stop at traffic lights when in drive mode. The rpm drops to 500. I change to Neutral and rpm jumps to 800. Consuming fuel badly. There is unburnt fuel smell from the exhaust. I connected my ELM OBD2 adapter and it read below codes. I see the check engine light flash during driving.
Clearing the engine codes doesn't help.
The entire engine and ECU were replaced around 7 months ago and car was used only for the last two months. I unfortunately do not have the previous ECU. The local mechanic said there is an issue with the below part.
Once we disconnect the hose going from this valve to engine, the vibrations smoothen out. Really don't know what part this is or its function. The valve actuates when I put back the hose. Really appreciate your help and suggestions.
Don't want to loose my baby.
While codes suggest ignition issues, what is condition of Mass Airflow Sensor?
06-21-21, 09:11 PM
LS400 1995- Severe vibration/Stalling/Misfire/unburnt Fuel in exhaust
