B.W.

iTrader: (3)

hey guys, just did the LS6 manifold swap along with !AIR and !EGR and now I'm having problems. The car sounds A LOT louder to, like it has an exhaust leak but I bought the blockoff plates for the !AIR and !EGR so this shouldn't be the problem. I also had the battery unplugged so maybe the PCM is trying to find idle? any ideas?

B.W.

iTrader: (3)

The idle is just EXTREMELY rough now, like the car is cammed or something and I have to give the car some gas or it dies.

Revelation Z28

iTrader: (10)

did you check for any vacuum leaks after doing your LS6 manifold swap?

B.W.

iTrader: (3)

This'll probably **** you off, but what should I be checking exactly?

2001NBMZ28

Go over and recheck everything, rough idle is normal while the PCM is relearning. You didn't mention a SES light, but some codes will not come on until after a few ignition cycles. Since you did !AIR and !EGR at the same time if they weren't already deleted you should be getting a light for those too.

B.W.

iTrader: (3)

Yeah I have an SES light, but I figured I'd have them right away anyways from my research. I've seen the PCM relearn idle this is just...different.

B.W.

iTrader: (3)

I checked the front 2 hoses and the rear small hose on the back and as far as I can tell everything is in order.

HeapaShifter

iTrader: (2)

I'm guessing vacuum leak too. Might be the intake gaskets not seated right. Brake booster hose not connected. PCV lines all connected right?

If it's louder you might have a exhaust leak. Did you put the gaskets back on with the block-off plates?

Also check for any sensor or hose that might not be plugged in.

staringback05

iTrader: (8)

did this manifold come with a tb and did you keep that tb?, check the brake booster and pcv lines as stated above....which gaskets did you use? the grey ones or the red ones?

B.W.

iTrader: (3)

I pulled the intake manifold again today and carefully put it back in. I think it was a (PCV?) hose that wasn't connected near the driver's side head back by the firewall. Car runs much better now. Thanks guys, you rock!