now a diesel head..
AO Silver Member
Join Date: Sep 2014
Location: United Kingdom
Rule out any vac leaks first..so visual inspection of all induction piping.
Then check maf (unplug and see if it runs better) and crank/camshaft position sensor,plugs,coils..you WILL need the codes really otherwise its all guesswork or throwing parts at it.
Then as its a jts a worn lobe on the exhaust camshaft would not be a surprise,unlikely to get a code for this I didn't on my old jts and it was misfiring on occasion.
Check timing as well.
Hope its A nice easy cheap fix for you.