01 stumbles/bogs at cruising speed and idle

98_Undertaker

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Lexington Ky
So for the last few months my car has had a stumble when I'm just cruising doesn't matter if its 35 in town or 70 on the interstate but when I go WOT the problem is not there. It will also surge some at idle and it will only do this when its warm. So far I've replaced the IAC, cleaned the mass air sensor, put copper NGK plugs in, changed COP's with frpp's, checked for vacuum leaks, and reset the system.

Today I'm going to change the throttle position sensor and fuel filter ( :( ) and see if it still continues. 192,xxx miles has finally revealed some of the items that need to be replaced

Anything else I should check while I'm at it?
 

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