S2000 Under The Hood S2000 Technical and Mechanical discussions.

Billmans How-To

Old 05-16-2019, 10:18 AM
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Some quick consideration for you guys. Background on my car : purchased from someone on the site that replaced the solenoids as well as the canister. Purchased knowing it throws this code. Did a quick test to get it to throw it. Filled it up and put it in the garage hot. Next day took it out. Warmed it up and then gave it a good Italian tune up. Code came on right away after the fourth time into vtec. Reset the code and drove 110 miles to expel a half of tank of gas. Let the car outside overnight. Opened the fuel filler cap and got rid of whatever pressure there was built up. Drove the car for 15 mins. All readiness set. Drove it hard for a bit and no check engine light.
The conclusion I have come to is that over time, and many heating and cooling cycles, the pressure sensor's performance degenerated to the point where high tank pressure/vacuum throw it out of wack. With a full tank of gas the gasses produced are under significantly higher pressure versus a tank that is half way or three quarters full. I don't care enough to actually put a new one on there , so just throwing it out there for anyone that is still chasing this down. For the record, this car has north of 200k miles and no mention of sensor replacement.
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