Can anyone help me by posting a picture of their vacuum connections from their Type R intake manifold? I have a feeling mine is messed up as I am getting fluctuations on idle.

 

why do you think its your vacuum lines? Were you recently tuned? If so you could trying pulling the purge solenoid. Also... have you recently mishifted and maybe bents some valves. Is your idling fluctuating at low rpms such as idle only? Some more information would help us diagnose an issue.

 

Ahh i have the same problem,my idle sticks at 1500rpm then drops to 1200rpm and the vacum pipes dont look right as it has a different t/b i think it's JDM one,just waitin for the standard one to arrive.

 

Since you have a PowerFC, I am 99% sure it is your tune.

A vacuum leak is very pronounced. You are describing what is known as a "hunting idle". I can fix the problem in 2 minutes with a wideband and your Power Commander.

 

Damn I like you confidence. Since you have such a vast knowledge in PowerFC, I am now getting slight knocking at light throttles when cruising on the freeway. The knock is around 20 and I can hear it coming from the engine bay. What should I do? Also is there a difference between a stock 96 DC2 ECU and a 98+ DC2 ECU? Are they both the same OBD?

 

Who tuned the PowerFC? I would take it to them and describe what you are noticing. If they are competent tuners, both the idle and knock can be taken care of.