Is this normal !?!

[smallswap]

I changed my intake manifold. I had a map sensor problem code 5 but I fixed the issue.

Now my car iddles at 1800rpm for about 2minutes and then it drops to 1100rpm goes back to 1800rpm ,1100rpm and goes back to 1800rpm and so on. I don't get any engine check light.

Is this normal?

 

[RICDOGG]

I changed my intake manifold. I had a map sensor problem code 5 but I fixed the issue.

Now my car iddles at 1800rpm for about 2minutes and then it drops to 1100rpm goes back to 1800rpm ,1100rpm and goes back to 1800rpm and so on. I don't get any engine check light.

Is this normal?

sounds like a gasket isnt sealing all the way somewhere.
pop the hood and listen for air being sucked in somewhere by the manifold..maybe even where the Throttle body meets the IM

 

[anekin007]

most common cause of this problem is by the idle screw not set correctly.