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Posted

For the past year or so, if I leave the car alone for a few days, regardless of temperature it has trouble starting. When I go to start it it will crank for a while but only fully start by giving it gas. When it starts an large plume of smoke along with fuel smell fills the air. Check engine light is not on.

I removed the air intake plastic stuff and put the key in the on position and a rock on the gas pedal. I removed the plate at the top of the throttle body and sprayed and cleaned out the 9 or so mini holes and the 2 larger holes. With my limited car knowledge I assumed this area to be the air intake bypass when the pictured valve is closed. I cleaned out throttle body as much as I could from the front without removing it. I had good results with this. The car started and maintained higher rpms than before. I thought it was a great success.

I then left it alone for 10 days and it wouldn't start.

What should I check next?
Do oxygen sensors have a role is starting or just running?
Does the MAF sensor have a role in starting if the throttle plate valve is closed during starting? (I didn't mess with the MAF sensor) Air filter is about a year old, lightly dirty, not filthy.

Help... I like this car, but I don't like the Lexus service bill. Thanks.

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Posted

Check the health of your battery. Is it supplying the proper cold cranking amps and voltage?

Posted

How often do you pump gas? Maybe gasoline bad, fuel pump or clogged fuel filter.

Posted

How many miles on the car? Check your battery terminals and make sure they are clean and tight. 

Posted

140,000. Battery was replaced this winter. Terminals are clean. Started right up this morning no problem after running it 2 days ago. No pumping the gas, no smoke. 

Posted

If no codes are popping up it might be a sign of the starter getting ready to go. It's just a guess though.

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