Hello all, I am having a major issue and driving me crazy. My 02 Xtype has a really rough idle only when it is like 35 degrees or lower, like when you first start up in the mourning. It will run rough for a little bit until it starts warming up and then it won't do it for the rest of the day. I have replaced the breather hose that everyone suggested and the IMT seals. Is there anything at all I can check and or replace. It has no check engine lights on etc...and only does it when it is really cold out...please, please, please help me on this. I need to get it fixed. Thanks

 

Look for threads about fuel trims then watch yours.

 

Inlet manifold gaskets are past their prime buy some silicone gasket maker, take the inlet off, clean and apply, it is not a hard job.

 

Pay particular attention to the lower manifold gaskets. Sometimes when people replace the plugs, they just do the upper ones. Mine was acting the same way. After replacing and dealing with every possibility of vacuum leaks, I replaced those lower manifold gaskets and problem solved.