VSV pretty loud
#1
VSV pretty loud
last year when it was SUPER cold out, i noticed a little ticking on my driver's side engine bay. followed the sound til i got to the VSV, put my hand on it and it knocks a little in unison with the ticking sound, so i figured i traced the problem. when it warms up, i either don't hear it at all or it is very quiet. now that it's SUPER cold out again this winter, i'm hearing it clicking loudly again.
1998 4runner w/ 5vz-fe, auto trans, 103K miles
my question(s)... is this going to cause damage to the engine if i don't do anything about it? is there even anything wrong? i'm not throwing any codes, just being a little paranoid about engine noise and wanting to know if it's normal or if something needs fixed or replaced. anyone have a quick "for dummies" explanation of what the VSV does? thank you much
1998 4runner w/ 5vz-fe, auto trans, 103K miles
my question(s)... is this going to cause damage to the engine if i don't do anything about it? is there even anything wrong? i'm not throwing any codes, just being a little paranoid about engine noise and wanting to know if it's normal or if something needs fixed or replaced. anyone have a quick "for dummies" explanation of what the VSV does? thank you much
Last edited by pattycakes77; 01-13-2009 at 01:24 PM.
#2
The VSV for evap basically pulses on and off when the pressure inside the charcoal canister reaches a certain pressure allowing excess fuel vapor to be burned inside the engine,after its converted back to liquid inside the charcoal canister..This is monitored by the ECM.
There was a post about this with a TSB posted.3rd post:
https://www.yotatech.com/forums/f2/e...1k-rpms-23903/
There was a post about this with a TSB posted.3rd post:
https://www.yotatech.com/forums/f2/e...1k-rpms-23903/
#3
The VSV for evap basically pulses on and off when the pressure inside the charcoal canister reaches a certain pressure allowing excess fuel vapor to be burned inside the engine,after its converted back to liquid inside the charcoal canister..This is monitored by the ECM.
There was a post about this with a TSB posted.3rd post:
https://www.yotatech.com/forums/f2/e...1k-rpms-23903/
There was a post about this with a TSB posted.3rd post:
https://www.yotatech.com/forums/f2/e...1k-rpms-23903/
thanks for that! i bought my 4runner used and know nothing about TSBs, is this something that they will honor this long down the road or is there a window for when/who they will honor a TSB for?
#4
3yrs or 36k on most TSB's, although an emissions tsb might be longer...They are intended to help techs diagnose problems.Campains (recalls) are usually no limit on milage/time experation.
Thread
Thread Starter
Forum
Replies
Last Post
Colington
86-95 Trucks & 4Runners
3
08-13-2015 02:21 PM