Do I Need To Retune?

[NisGTR]

Do I need to re-tune my car after changing the valves? for some f**king reason now at idle its hunking up and down in revs after I rev it abit. Its really starting to piss me off. ever since the idler pulley bolt gave up the car is nothing but problems now.

[DVS JEZ]

Do a smoke test to ceck for any intake leaks.

It may be something simple causing it. The IAC valves play up causing a hunting idke. Check the DIY section for info on how to clean them.

But make sure base timing is set, TPS is adjusted correctly etc