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From the gasket between the top engine cover & TB, to just about every vacuum hose on the engine (and maybe a couple more like the fuel system vapor recovery system), these motors do not like vacuum leaks. Intermittent running like this is a bane of a few owners that seems to take quite a while to troubleshoot/fix. Vacuum leaks can be found within the engine area if ether (or) carb cleaner is targeted sprayed (but not overdone, slow but sure) in short bursts until idle is interrupted/stumbled (in most cases). One definite place to check is the "O" ring between the TB and intake, that ring slips out the 'groove' (I used petroleum jelly to hold mine in place) while attaching the SRT-6 TB, causing many members a stumbling/rough idle issue. Good luck solving this!


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