weird vacuum problem or not - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

dori2 s13coupe · 09-07-2006, 01:21 PM

not sure if its a vacuum leak, but at idle my vacuum is at -15. when i press the throttle it goes to -5 (which is normal) but then goes back down to like -10. doesnt matter how much i open the throttle it always goes back like -7psi ex. i press throttle it goes to like 0 but then drops back down to -7. if it is a vacuum leak it would only matter if the throttle is closed(right?) so since i get more vacuum when the throttle is open, what does that mean? its really messing up my car and i cant figuire it out. let me know thanks!

t3 turbo
sr smic
walbro 255
460 inj
bov

punxva · 09-07-2006, 08:48 PM

sounds like u said, a boost leak, search for the thread that shows u how to make a diy boost leak tester and try to figure out where its leaking from.

shayrgob240 · 09-07-2006, 09:21 PM

are u sure your gauge is ok? try and swap it w/ a known good one and see what happens

dori2 s13coupe · 09-07-2006, 09:47 PM

well the thing is... its not when im boosting.. cause i CAN boost no problem.. so its not a boost leak... my gauge is fine and its a autometer..

09-07-2006, 01:21 PM	#1
dori2 s13coupe Zilvia Junkie Join Date: May 2003 Location: Cerritos, CA Age: 38 Posts: 504 Trader Rating: (0) Feedback Score: 0 reviews	weird vacuum problem or not not sure if its a vacuum leak, but at idle my vacuum is at -15. when i press the throttle it goes to -5 (which is normal) but then goes back down to like -10. doesnt matter how much i open the throttle it always goes back like -7psi ex. i press throttle it goes to like 0 but then drops back down to -7. if it is a vacuum leak it would only matter if the throttle is closed(right?) so since i get more vacuum when the throttle is open, what does that mean? its really messing up my car and i cant figuire it out. let me know thanks! t3 turbo sr smic walbro 255 460 inj bov __________________ Signature Not Available

09-07-2006, 09:47 PM	#4
dori2 s13coupe Zilvia Junkie Join Date: May 2003 Location: Cerritos, CA Age: 38 Posts: 504 Trader Rating: (0) Feedback Score: 0 reviews	well the thing is... its not when im boosting.. cause i CAN boost no problem.. so its not a boost leak... my gauge is fine and its a autometer.. __________________ Signature Not Available

09-07-2006, 09:21 PM	#3
shayrgob240 Zilvia Junkie Join Date: Jul 2003 Location: gurnee, IL Age: 40 Posts: 441 Trader Rating: (0) Feedback Score: 0 reviews	are u sure your gauge is ok? try and swap it w/ a known good one and see what happens