• Tags

vacuum leak

  1. SURGING IDLE / NO IDLE CHECKLIST FOR 1999–2004 MUSTANG GT (4.6L 2V) - Work In Progress

    SURGING IDLE / NO IDLE CHECKLIST FOR 1999–2004 MUSTANG GT (4.6L 2V) This is a work in progress. Please run this checklist when it is applicable to you and provide feedback to help improve it. Feel free to comment with corrections or suggestions or diagrams or pinouts that you think might be...
    • Noobz347
    • Thread
    • Aug 30, 2025
    • 99-04 mustang gt coil on plug dpfe egr fpdm fuel pressure iac valve idle problem maf sensor misfire no idle obd-ii codes returnless fuel system rough idle surging idle tps sensor vacuum leak
    • Replies: 0
    • Forum: 1996 - 2004 SN95 Mustang -General/Talk-
  2. SURGING IDLE / NO IDLE CHECKLIST FOR 1996–1998 MUSTANG GT (4.6L 2V) - Work In Progress

    This is a work in progress. Please run this checklist when it is applicable to you and provide feedback to help improve it. Feel free to comment with corrections or suggestions or diagrams or pinouts that you think might be useful. SURGING IDLE / NO IDLE CHECKLIST FOR 1996–1998 MUSTANG GT...
    • Noobz347
    • Thread
    • Aug 30, 2025
    • 96-98 mustang gt dpfe egr fuel pressure iac valve idle problem maf sensor misfire no idle obd-ii codes rough idle surging idle tps sensor vacuum leak
    • Replies: 0
    • Forum: 1996 - 2004 SN95 Mustang -General/Talk-
  3. B

    Vacuum Line Locations

    Been hearing a vacuum leak on my ‘67 and went to take a look, but can’t find vacuum lines. Engine was swapped from the original 289 inline 6 to a 351C. Have tried to look up diagrams of the engine but cannot find anything matching. Any help would be greatly appreciated.
    • Black._67
    • Thread
    • Jun 14, 2025
    • vacuum leak vacuum line
    • Replies: 1
    • Forum: 1965 - 1973 Classic Mustangs -General/Talk-
  4. 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-
  5. T

    No power to the MAF Sensor

    Having troubles starting my 03 gt 4.6 , I get cranking but no firing. Hooked the scanner up for the live stream while cranking and my MAF reading stays at 0.09 lbs... After cranking the car I’m hearing a air leak near the firewall by the passenger side. I’ve wiggled the hoses to see if the...
    • ThatsNotThunder
    • Thread
    • Jun 16, 2020
    • 2003 ford mustang gt 4.6 cranking maf no start vacuum leak
    • Replies: 0
    • Forum: 1996 - 2004 SN95 Mustang -General/Talk-
  6. B

    Engine Bobby wants to fix his turbo car

    I just bought a 90 mustang GT,5.0, automatic with a turbo. I noticed the exhaust and fuel system has been upgraded. I also noticed a vent line not on there. I'm not sure if it's because of turbo or just was left off. This car is very clean and very fast. I also need to do a head gasket job on...
    • Bobby from 757
    • Thread
    • Jun 6, 2019
    • head gasket over-heating? turbo vacuum leak
    • Replies: 33
    • Forum: Fox 5.0 Mustang Tech
  7. P

    Just arrived with a 1965 289 and a 1973 Mach I - and a vacuum leak solved

    I just joined this resource and want to introduce myself. I own a 1965 red convertible 289 with a Holly 4 bbl and a 1973 yellow Mach 1. A couple of days ago I was driving my 1965 and all was well - nice trip around the "long block". A little later my daughter and her friends wanted me to take...
    • Peter C B
    • Thread
    • Jun 3, 2019
    • rough idle timing chain vacuum leak
    • Replies: 1
    • Forum: The Welcome Wagon
  8. 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
  9. R

    89' Lx 2.3

    Hi, new here. About the car- Automatic, 2.3 EFI, 110k miles roughly, at least from what the prev. owner told me, had 89k miles when I bought it. but who knows if it was 89 or 189.?? right. Recently rear ended, no obvious damage, not even mechanic could give an estimate, couldnt find anything...
    • Ravyn
    • Thread
    • Nov 26, 2016
    • electrical heater running cold vacuum leak
    • Replies: 2
    • Forum: 2.3L (N/A & Turbo) Tech
  10. M

    New Owner Many Issues. Help!!!!

    Hello so I have a 2001 mustang GT 4.6 most stock from what I know. Flow master exhaust new alternator and battery recently changed. Just did coolant flush earlier today. I bought this car from craigslist from a so called mechanic. The first day I had the at the car ended up dying that night...
    • Ms coco
    • Thread
    • Mar 10, 2016
    • accelerating battery clutch ground newbie vacuum leak
    • Replies: 3
    • Forum: SN95 4.6L Mustang Tech
  11. J

    Idle Only With Full Choke?

    Hey everyone, in need of a little advice. My engine was running fine (maybe a little too rich) until I swapped the spark plugs. All of a sudden the engine starts misfiring and running terribly even after i checked the gaps. I watched the mechanic down the street tweak the carb a little and he...
    • Jared Zecchel
    • Thread
    • Oct 20, 2015
    • carb rebuild full choke idle misfire vacuum leak
    • Replies: 2
    • Forum: Classic Mustang Specific Tech
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