Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post - Stumbles off boost, low RPM, idles fine, boosts fine

AuburnRyan · 03-08-2006, 08:58 AM

Hey all,

s13 SR with FMIC, HKS SSQV, Walboro HKS Actuator, etc. etc.

Car boosts great to 14psi, and idles fine around 1000 RPM.

Car has developed hiccups, stumbles, or bogs briefly when I'm cruising off boost (usually around -10 vac). The vaccum seems to *sometimes* jump when this happens, but it's a quick hiccup when I'm cruising.

First thing I'm thinking is vaccum leak. I just glanced over the lines which look snug.
I recently repaced spark plugs a few weeks ago.
Could my walboro be going out?

Any other ideas?

03-08-2006, 08:58 AM	#1
AuburnRyan Zilvia Member Join Date: Aug 2002 Location: Northern VA Posts: 272 Trader Rating: (0)	Stumbles off boost, low RPM, idles fine, boosts fine Hey all, s13 SR with FMIC, HKS SSQV, Walboro HKS Actuator, etc. etc. Car boosts great to 14psi, and idles fine around 1000 RPM. Car has developed hiccups, stumbles, or bogs briefly when I'm cruising off boost (usually around -10 vac). The vaccum seems to sometimes jump when this happens, but it's a quick hiccup when I'm cruising. First thing I'm thinking is vaccum leak. I just glanced over the lines which look snug. I recently repaced spark plugs a few weeks ago. Could my walboro be going out? Any other ideas? __________________ '93 Fastback LE - Wrecked '91 Fastback HICAS and LSD - Sold '93 Fastback SE - Current