hks cams questions (264/272 dsmers please anwser

[Flybiyou]

Ok first my vac needle is jumpy sometimes and I do mean jumpy. Other times it is smooth as can be. The rpms are usally acting funny to with the vac sometimes is between 750 and 900 and sometimes it is is 600 to 750 and it does it when ever it feels like it. For example (car is warm up) get in go to the store idle is fine vac is fine. Turn it off go in to the store come out and start the car and it idles like crap sometimes it just dies. The other thing is if I stay in gear and keep the revs around 3000 to 4000 it feels like it is jerking not bad you really have to pay attention to notice it (kinda feels like it is lobeing) is that normal. This happens in 1st thru 3 rd gear. Any thoughts on this would help.
Check profile for all other mods.

Aj

 

[Colossus]

If you stay in gear at a decent RPM, and it feels jumish, it may be your TPS. Mine's doing it right now, and it jumps around on the S-AFC sayen Im at 38-40-0-100-98-72, etc. Sometimes it'll be going and it'll say I'm at 0%, and it gets kinda jumpy. Not bad, but you can feel it if you're in that cruise mood.

 

[nukefission]

Check for boost leaks.