DIY Smoke Test Reveals SECRET Intake Leak

Still battling that frustrating Mustang idle surge? In this Foxbody Mustang troubleshooting video, we dive deep into diagnosing a vacuum leak that's been driving us nuts. Using a DIY smoke machine we built from scratch, we go step-by-step to smoke test for vacuum leaks, pinpoint idle issues, and get one step closer to smooth idle perfection. Whether you're trying to fix idle problems on your 5.0 Mustang or hunting down mystery engine issues, this is the kind of real-world Mustang repair video that every Foxbody fan needs to see.

We’ve already cleaned the IAC, swapped out sensors, replaced the brake booster, and hunted down every possible vacuum hose and leak. In this episode, we finally find the problem—and it’s not what we wanted to see. Follow along as we fire up the custom smoke machine, chase vacuum leaks, and get a little help from Izzy the shop lizard 🦎.

🔥 Fixing Mustang Idle Surge
🔧 Foxbody Mustang Vacuum Leak Diagnosis
💨 DIY Automotive Smoke Machine in Action
📹 Hands-On Garage Troubleshooting

#MustangIdleSurge #FoxbodyFix #VacuumLeakTest #DIYSmokeMachine #CarRepair #Mustang5.0 #GarageLife #NineFingerWrenching

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🧰 Wire used in our smoke machine build:
Amazon link (We may earn a small commission as an Amazon Associate—thank you for supporting the channel.)

⏱️ Chapters
0:00 Intro
0:12 Catching up on the project
2:21 Meet Izzy the shop lizard
2:46 Building the DIY smoke machine
4:44 Testing our smoke setup
7:03 First smoke test attempt
8:03 Second attempt—yikes
8:45 Unexpected scare moment
9:35 Third time's a charm
10:55 Vacuum leak discovered
12:50 Explaining to Ben
13:45 Cracked upper intake
13:50 Wrap-up & what’s next