Idle Burp - 99 Max

[bratfry]

What is an idle burp?

Well my 99 maxima drops rpms for a half a second, every once in a while, when I have my foot on the brake, transmission in drive and at idle. (like at a stop light). Its seems to have something to do with the idle speed, if idle speed is about 800 then it seems ok, but if the idle drops to 500-600 then it has a better chance of burping. Why I have different idle speeds for similar conditions I don’t know.

Also, I have tried to use the hand break, instead of the foot brake, at the stop light and then the burp does not happen.(vacuum problem?) Crazy isn’t it. It does it more when the engine is hot but I think that’s got to do with the idle speed of the cold engine being faster.

No engine codes displayed since I replaced all the Oxygen sensors.

How do you set the idle speed on this car?

Anyone experienced such a problem? Got any ideas? Hey I’m open to anything?

Thanks