LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Fuel Tank Vent

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02-27-16, 07:27 AM

#1

pacerdonfl

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Fuel Tank Vent

91 LS400 - where is the fuel tank vent? My car kept stalling and after trying many things, I finally removed the fuel cap and it's been running fine for 2 days. I thought it was supposed to have a positive pressure in the fuel tank. It seems mine was having a vacuum.

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02-27-16, 10:32 AM

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pacerdonfl

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Well - let me say now that after 2 1/2 days running fine, did the stall thing again today. Filled fuel tank....trying again....

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02-27-16, 11:18 AM

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AandSC

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It's possible you may need a new fuel cap. I had to replace mine because of a venting issue. I would start there.

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02-27-16, 01:31 PM

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dicer

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Venting is pretty much done with the evap system on any O2 sensor cars.

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