Check fuel pressure at injector rail. Regulator may have failed.
and get a new mechanic.
SOURCE: lexus gs300
inside the gas tank. remove the gas tank and its right on top. remove all 3 screws and turn and pull out.
SOURCE: 96 lexus es 300 blinking check engine light
Hi there;
#4 Miss-fire. All the things you are saying make a lot of sense. When the light is blinking the cylinder is actualy misfiring, & the smell you are smelling is the fuel that is not burning in the engine burning in the exahst. This can cause a lot of damage to the exausht if it is not repaired..
There is still a couple of things that need to be checked, first he needs to check to see if it is possibly a fuel injector that is sticking. He can do this easily by moving the #4 injector to another cylinder & run the car. When it starts missfiring he will need to see if it is still #4 or if it is the cylinder that he moved the injector to. if it is the new cylinder it is obviously the injector, if it is still #4 he will need to look into the possibility of the EGR valve sticking open or some other issue to do with valve timing or low compression.
I hope this helps
Farrout!
SOURCE: 2002 Lexus RX 300 stalls
There is another post that I answered that is the same thing. You need to clean your IACV. See other post for details!
SOURCE: my 95 lexus gs 300 wont start
Try to replace the fuel filter and then check the spark plugs. Mke sure to clean the spark plugs and after you clean the spark plugs and still the same it wont start replace the spark plugs and check the distributor as well.
I’m happy to assist further over the phone at https://www.6ya.com/expert/ramy_d9e7ebea3891f482
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