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Discussion Starter #1
Anyone have experience fixing these on your IS? I have been chasing these for awhile. Pops up every 400 miles or so...

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2002 Lexus IS300
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Most common evap leaks I have found on these cars are the evap hose that runs from the intake to the purge valve and the small evap hose that is on the back of the manifold attached to the green evap purge solenoid.

a smoke tester will find the leak very quickly.
 

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Discussion Starter #3
I believe I have replaced all of those.... I will go and look this afternoon
 

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2002 Lexus IS300
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No, I have been wanting to, just dont have the equipment/tools for this yet. Is there an inexpensive smoke test setup that you would recommend?
My buddy bought this one:


It works well but there is a lack of fittings for different size hoses and what not. Really you will be testing small hoses 90% of the time so it works just fine and will definitely work for what you need it for.

If you do decide to buy this one please buy this tool as well. It makes blocking off large various size intake tubes a breeze:

 
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I have this one. I bought it about 5 years ago. The price has gone up since I purchased it. It works well too but like I said, I don’t even use some of the adapters in the box because they are simply too big. I do use that intake bellow to block the intake tubes that I linked above^
 

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No, I have been wanting to, just dont have the equipment/tools for this yet. Is there an inexpensive smoke test setup that you would recommend?
If you have a compressor. You can make one with some pipe and a cigarette. But it is a pain to use. Just buy one or ask a shop. Some auto parts stores have them to rent.
 

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Just out of interest how do you work them? Blow smoke into the engine bay and look for air movement? Or fill the intake with smoke and look for smoke coming out (im guessing you dont run the engine on this method?)?
 

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Just out of interest how do you work them? Blow smoke into the engine bay and look for air movement? Or fill the intake with smoke and look for smoke coming out (im guessing you dont run the engine on this method?)?
Same as a regular smoke tester. The pipe holds a lit smoke and then you force air through the smoke backward basicly. Then out into the system. Sorry I made one a very very long time ago. When Machines where real costly.
 

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Discussion Starter #13
Well I replaced the gas cap with a new one... LOL Still getting the codes....

135368
 

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A smoke tester is the best diagnosis tool but if you stand on your RR quarter panel and smell gas there’s a high chance it’s that. Obviously don’t check it after filling up.
 

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Discussion Starter #18
Very common for the gas tank vapor vent valve to crack and cause this code.

This is on TOP on the gas tank, yes? would require dropping the tank or removing the rear seats and cutting the sheet metal to access?
How would I be able to see this leak with a smoke test?
 

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This is on TOP on the gas tank, yes? would require dropping the tank or removing the rear seats and cutting the sheet metal to access?
How would I be able to see this leak with a smoke test?
Yes it’s on top of the tank. Some people do cut the sheet metal under the seats as seen on YouTube.... that’s ratchet. Plus you better measure twice or you’ll be needing another tank. Correct procedure is to drop the tank. I noticed the strong gas smell even though the code was set only a couple of times. If you do drop the tank there’s another valve and gasket you should replace while you’re there.
 
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