HKS 264 Step 1 Cams - Vacuum lower? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ka24det-power · 06-29-2005, 10:15 PM

I just installed my HKS 264 Step 1 Cams. Went pretty smooth the only issue I have is that it wants to stall when I let the motor drop from high RPM's to idle. I am only getting about 14 to 15psi of vacuum at idle. Before the cams it was 19 to 20psi of vacume.

I adjusted the IAV to raise the idle (which it does) but it still wants to stall when I drop it from high RPM's. I did a vacuum check and I have no leak. I have a GReddy intake mani as well.

Is this normal what should I check?

06-29-2005, 10:15 PM	#1
ka24det-power Zilvia Member Join Date: Dec 2004 Location: Florida Posts: 188 Trader Rating: (0) Feedback Score: 0 reviews	HKS 264 Step 1 Cams - Vacuum lower? I just installed my HKS 264 Step 1 Cams. Went pretty smooth the only issue I have is that it wants to stall when I let the motor drop from high RPM's to idle. I am only getting about 14 to 15psi of vacuum at idle. Before the cams it was 19 to 20psi of vacume. I adjusted the IAV to raise the idle (which it does) but it still wants to stall when I drop it from high RPM's. I did a vacuum check and I have no leak. I have a GReddy intake mani as well. Is this normal what should I check?