Im sending my PCM into PCMforless.com to get it tuned, i recently put a set of jet hot long tubes on my Z and it runs like crap after about 10 minutes of driving it. If they tune it for the headers, will i still have to get O2 simulators? Also, how reliable are electric water pumps and are they really worth it??

 

If you said no cats on the ordersheet than you will not need o2 simulators. ALot of times when people install headers (especally pacesetters coating) the coating will burn off and foul out the o2 sensors quickly.

We reccomend running a throw away set of o2's for the first 500 miles or so.