[ILBCNU6]

My daughter's 89 Buick Century with the 3.3l V6 revs like mad sometimes but most of the time runs normal. Her 86 T-Type did it too. Any ideas to what would cause this? IAC? Sensors? Gene

 

[viperkiller]

Check for vacuum leaks.I just had that problem was one tiny little air leak on the fuel block air line.