• Tags

vacuum

  1. 3

    Fox Vacuum tree replacement?

    Anyone using a aftermarket vacuum manifold with npt fittings instead of the stock tree? Wanting to find something I can install push lock fittings as well ask having ports big enough for the source from the manifold and for the power breaks.
    • 387lx
    • Thread
    • Mar 23, 2026
    • engine vacuum
    • Replies: 5
    • Forum: 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  2. F

    WILL HEAT WORK WITH NO VACUUM

    I know it will be defaulted to the defroster vents but will the air coming out of the defrost vents get warm on a 1990 if there is no vacuum connected to the HVAC controls? if not what size hose connects to the rear of the HVAC controls to run out to the firewall? thanks
    • Foxbodychris90
    • Thread
    • Dec 14, 2024
    • heater hvac vacuum
    • Replies: 4
    • Forum: 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  3. M

    2000GT with vacuum leak behind dash

    Hello all, What is the best way to get behind the dash to repair the vacuum leak? Do I go up behind the glovebox or do I need to pull the control console for the air and stereo out? My 2000 GT has, as the title would suggest, a vacuum leak behind the dash. This is the vacuum circuit that...
    • MyTeaIsIcy
    • Thread
    • Sep 7, 2022
    • 2000 defroster gt leak vacuum
    • Replies: 1
    • Forum: 1996 - 2004 SN95 Mustang -General/Talk-
  4. B

    Fox 1984 3.8 CFI Hatch - Help With Three Unknown Vacuum Lines

    I'm hoping someone can look at the red lines in these pictures hooked up to a T-connector going to the air cleaner and tell me where they go. Obviously this isn't right. The nipples on the far ends of the red hoses weren't hooked up to anything and the black hose on the T-connector going to...
    • badcrc
    • Thread
    • Jul 29, 2021
    • hoses vacuum vacuum lines
    • Replies: 1
    • Forum: 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  5. N

    Need help from germany 5.0

    Hi everyone. Im about to restore a 67 Mustang with a 5.0L H.O. engine from 1993 Fox. Its my restomod. Ive read a lot of vacuum leaks and engine problems... to my set up. Ive got the original mainfold intake and the original alternator on this engine. Nothing else. So my question: What vacuum...
    • Nitram1967
    • Thread
    • Dec 14, 2020
    • 1993 5.0 air tubes help high output restomod vacuum vacuum leak
    • Replies: 27
    • Forum: 1965 - 1973 Classic Mustangs -General/Talk-
  6. L

    Engine Rough Idle at Start, Possible CMCV Vacuum Leak

    Hi, I have a 2015 salvaged coyote in a 67 mustang running on the control pack. Everything is up and running, but it seems to have a rough idle at start. The idle continues to be rough until I rev the engine and it settles down to normal at around 1000rpm for about 5 seconds, after 5 seconds...
    • larsond12
    • Thread
    • Apr 12, 2019
    • 2015 ford mustang cmcv hanging rpm idle idle issues idle problems rough idle throttle body vacuum vacuum leak
    • Replies: 0
    • Forum: 2015 - 2023 Specific Tech
  7. D

    Engine Vacuum problem

    I’ll make this as short as possible. Basically I plugged off all my unused vacuum ports on the “vacuum tree” and it bogs down like it wants to shut off once it’s warmed up. But it runs good at idle. But if I pull a couple of them off it doesn’t shut off but idles down a lot and runs worse. Any...
    • Dirtnastyfox
    • Thread
    • Mar 24, 2019
    • rough idle tree vacuum vacuum problem
    • Replies: 14
    • Forum: Fox 5.0 Mustang Tech
  8. Vacuum routing question/issues

    I've got a 1987 Mustang 5.0, AOD transmission. Someone before me did a smog pump delete, I don't really think they did it properly but that's something for another day. I have two vacuum lines that I'm not quite sure where they belong. I'm assuming that one belongs on part of the smog system...
    • Vulpes5.0
    • Thread
    • Jan 4, 2019
    • foxbody vacuum
    • Replies: 5
    • Forum: Fox 5.0 Mustang Tech
  9. C4 Transmission has very delayed shifts

    Hi guys, I have a 1970 mustang with a 302 and a c4 select shift transmission. Recently the transmission has been delaying its shifts more frequently as time passes. I adjusted the vacuum modulator screw to reduce the delay and it has not worked (3 full turns counterclockwise). As of right now...
    • Nick Bos
    • Thread
    • Oct 20, 2018
    • auto transmission problem automatic transmission c4 transmission help help me noob shift problems shifting transmission vacuum
    • Replies: 0
    • Forum: 1965 - 1973 Classic Mustangs -General/Talk-
  10. G

    Stupid Questions EGR and Timing

    Hi, Stil to get my car registered but that is another story. I have a couple other questions: 1. When I hook the EGR vacuum up it wants to stall the engine at idle. It didn't do this before but when I was working on something else I noticed the vacuum line to egr was broken so I fixed...
    • gstsaver
    • Thread
    • Aug 5, 2018
    • egr spout timing vacuum
    • Replies: 13
    • Forum: Fox 5.0 Mustang Tech
  11. I

    Fresh 331 Oil Issue Help

    Hello, I used to have an account here but I havent had a fox for a bit and forgot my password... I really need help, I just finished a 331 stroker on my 88 notch ex georgia police interceptor. When I purchased the car it was a 306 with edelbrock performer intake and heads, 24lb injectors with...
    • ilemt88
    • Thread
    • Jul 23, 2017
    • 331 egr help oil rebuild vacuum
    • Replies: 12
    • Forum: Fox 5.0 Mustang Tech
  12. Engine Pcv Valve, Battery Ground, Ford Tfi Ignition Explained

    If this has already been posted before my apologies, but this guy explains what you SHOULD do with your PCV valve after modifications, ESPECIALLY if your blown! Explanation starts at 19:55. View: https://www.youtube.com/watch?v=RmimUZ0hjeA
    • stang89bidges
    • Thread
    • Jan 17, 2017
    • battery cables battery ground distributor efi pcv vacuum video
    • Replies: 14
    • Forum: Fox 5.0 Mustang Tech
  13. T

    Ac Coming Out Defrost Vent

    Whenever i turn my air on, it only works coming out of the defrost vent regardless of where it's set. I've read up and found a common source to be a vacuum leak. My mechanic looked at it this morning and said that if it was a vacuum leak he would be able to hear it and the engine would run...
    • Themacdaddyj
    • Thread
    • Mar 29, 2016
    • air defrost leak sn95 vacuum vent
    • Replies: 3
    • Forum: SN95 V6 Mustang Tech
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