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RacerWeber

Problems with Toyota Crown 2020: Unsteady engine, black smoke and increased fuel consumption

Hey guys, recently my 2020 Toyota Crown has started having some issues. It smokes black when accelerating, the check engine light is on, the engine stalls by itself, loses power, runs rough and ticks when accelerating. In addition, there is increased fuel consumption and a strong exhaust smell. It has also started to stutter when idling. I suspect that it might have something to do with the low-pressure fuel system. Does anyone have any experience with this and can give me some advice? Would like to know how you solved this in the workshop?

(Translated from German)

Summary of the thread

A 2020 Toyota Crown is experiencing issues such as black smoke during acceleration, a check engine light, engine stalling, power loss, rough running, ticking sounds, increased fuel consumption, and a strong exhaust smell. These symptoms suggest potential problems with the ignition system, such as worn spark plugs or a defective ignition distributor, and issues with the air-fuel mixture, possibly due to a clogged air filter. It is recommended to check and possibly replace the spark plugs and air filter, as these are relatively inexpensive and straightforward repairs.

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4 comment(s)

SabiHell

Hey, I had a similar problem with my Toyota Camry, year 2018, so a similar model but a bit older. To understand, I am not a car mechanic, but I have had some experience with car repairs. I went to a local garage and after some research they found out that it was incorrect software values for the fuel pump. The guys at the garage reprogrammed the software and it cost 45.0 euros. It's always good to have all the information about your vehicle. Could you give me a few details such as the engine type or the exact mileage? Maybe I can then give you a few more tips.

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RacerWeber (community.author)

Hi, thanks for your reply. My Crown has a mileage of 54791 KM and its last service was recently. It is a gasoline engine. Hope this helps to get some more suggestions. Quite expensive that they took 45.0 euros for a software update. Hopefully I can avoid that with my Crown.

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SabiHell

Hey, thanks for your quick reply. It's always annoying and you want to get it off your plate as quickly as possible. With the mileage, I really wouldn't put the low pressure fuel system as the main problem, unless there was grossly negligent behavior involved. With the description of the symptoms, the following things could play a role: First of all, rough engine running is a classic indication of ignition problems. Perhaps the spark plugs are worn or the ignition distributor is defective. Check this, spark plugs are quite inexpensive and easy to replace. The strong exhaust smell and the black smoke could indicate a problem with the air-fuel mixture in the engine. This usually means that too much fuel and not enough air is burning in the engine. Check that the air filter is clean. If it is clogged, the engine is not getting enough air. The other symptoms - loss of power, stuttering at idle and increased fuel consumption - could be a sign of a problem with the fuel system, perhaps the pump is faulty or the injectors are clogged. Maybe do these checks first and then get back to us. You may already be able to rule something out or determine something. Hopefully this will help and you will get closer to the problem. Good luck!

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RacerWeber (community.author)

Hey, thanks for the detailed advice and the time you spent on this. You're right, it could be that there are multiple problems. I'll check the ignition problems and the air filter first as they sound like inexpensive repairs. I'm not a professional, but with your instructions I should be able to do it. If I have any questions after the check, I'll get back to you. Hopefully it won't be too expensive. Keep your fingers crossed for me!

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TOYOTA

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CROWN