problems with my corolla 91.

Greetings, I tell you that I cleaned the valve that you recommended me (idle) and gave me magnificent results, and I say magnificent because the vehicle feels like I had never felt it, ok, to that point all good, then I felt that I failed again and I stopped the previous but less abrupt problem than before, I think that the remedy will be replacing it ,,,,,,,,.,,,,,,.,,,,,,,.,,,,,,,

hello. I am glad to know that you have achieved a good result, but before you decide to change it, try to clean the entire admission system Don de Va housed, the problem may not be the valve but that you get dirty by contaminated ducts. And the other disconnects the battery for a few minutes to reset the ECU and do not recognize the fault.
luck...

Thanks for all Victor, sorry for me that I did not answer you to tell you how your advice has turned out but I had problems with my internet connection, but I have good news, after cleaning my vehicle is super stable and the march is not altered at all, I mean it is as new, the problem is solved, your help was excellent, that's why I tell you that thanks because people like you make the mechanics work more realizable.