jrot;1663849 said:
yes its a fuel pressure up vac. solenoid valve. as for exact operation i would be lying if i said i knew "exactly" what it does but if i remember correctly from a year ago it was tied in to the vac line that went with the power steering idle speed up valve...i "assume" this is where you tell me this is where the motor gets its 1:1 referance on boost....how ever i dont believe it worked accurately if that is what it does....all i know is our fpr works just fine without it....if it doesnt then prove me wrong and ill put it back...toyota also had to do alot to these cars for epa regs ect....just cause toyota put it there doesnt mean it has to be there to run, or run properly....like i said ive got a year of real world testing and im better off with mine gone.....if radiod is right and it bump fuel pressure on warm starts then big deal it will run rough for a sec on a warm start....ive never had an issue.....if its more important then i actually hope im wrong.
Actually, the point I want to make is different.
You need to understand why something is on the car before you muck with it. You ABSOLUTELY need to understand it before you come here, to the technical section, and post advising other people to muck with it. Toyota is perfectly capable of putting something on the car that isn't required where you use it, however, is critical in some other environment. Furthermore, they are also very capable of adding something to a car that only saves the engine from failing once every 10,000 starts. Or extends the life of the average engine from 40k miles to half a million miles. Your year of real world testing pales to near insignificance by comparison to the testing done by Toyota.
For this particular piece, when was the last time you ran the car on a hot day, shut it off, and tried to start it again 5-10 minutes later? This VSV combats heat soak on hot starts, by allowing higher pressure to the fuel pressure regulator, which will flush hot or boiled fuel out of the fuel rail.
