After disconnecting the battery negative terminal for cleaning, I noticed that the idle is a little rough. It seems to run ok, otherwise.
Anyone have an idea of what may have gone wrong? Is there a proper proceedure for diconnecting the battery that I violated?
Well, you don't specify what vintage or even type of car you are dealing with. But, any car since about 1985 or so, in other words, with a computer controlling the ignition, fuel system, etc. will do this.
When you disconnect the battery, you delete all the codes that the computer has stored. The computers "learn" how each individual engine works, and adapt. After a few cold starts, runs up to temperature and back to cold cycles, it should get back to normal.
Disclaimer: You COULD have knocked something (vacuum hose?) loose while poking around. The above assumes you did not.
Regards,
DAve
Dave,
Thanks for your help. As you advised, the situation seems to be improving on my 2005 Camry LE 4 cylinder.
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