hightime81
NAXJA Forum User
- Location
- Holly Springs, NC
Morning all!
93' XJ 4.0, NP231, AW4, with 125K, stock except for mustang injectors.
It may have been happening longer, but within the past week i have noticed (almost always when hot, sometimes when cold (engine temp)) that i have a very high-pitched whistle going on at idle. as soon as i give it a bit of throttle it diminishes, so i assume it's a vacuum leak. sounds like it is on the top-right of the engine, close to the firewall.
i have wiggled and jiggled about all the vacuum lines around that area (CCV breather (which is new), MAP sensor, TPS, IAC and haven't been able to quite pinpoint it.
anyone have any suggestions on a better way to pinpoint which line is leaking? I haven't tried spraying carb cleaner or removing lines and plugging them yet, but I'm kind of guessing those are my only other options, right?
As always, thanks for your input!
93' XJ 4.0, NP231, AW4, with 125K, stock except for mustang injectors.
It may have been happening longer, but within the past week i have noticed (almost always when hot, sometimes when cold (engine temp)) that i have a very high-pitched whistle going on at idle. as soon as i give it a bit of throttle it diminishes, so i assume it's a vacuum leak. sounds like it is on the top-right of the engine, close to the firewall.
i have wiggled and jiggled about all the vacuum lines around that area (CCV breather (which is new), MAP sensor, TPS, IAC and haven't been able to quite pinpoint it.
anyone have any suggestions on a better way to pinpoint which line is leaking? I haven't tried spraying carb cleaner or removing lines and plugging them yet, but I'm kind of guessing those are my only other options, right?
As always, thanks for your input!