20 Best Car Vacuum Leak Detector [2022]

Are you looking for the best Car Vacuum Leak Detector? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Car Vacuum Leak Detector.

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1 AutoLine Pro Automotive Smoke Machine Leak Detector EVAP Vacuum Diagnostic Tester | Shop Series |... AutoLine Pro Automotive Smoke Machine Leak Detector EVAP Vacuum Diagnostic Tester | Shop Series |...
2 AutoLine Pro Automotive Smoke Machine Leak Detector EVAP Vacuum Diagnostics Tester | Economy Series... AutoLine Pro Automotive Smoke Machine Leak Detector EVAP Vacuum Diagnostics Tester | Economy...
3 Vacuum Car EVAP Smoke Machine Leak Detector Diagnostic Tester Built-in Pump 12V for Automotive Pipes... Vacuum Car EVAP Smoke Machine Leak Detector Diagnostic Tester Built-in Pump 12V for Automotive...
4 FXTUL Automotive EVAP Smoke Machine Fuel Leak Detector Leak Down Tester with Dual-Modes 12V Car Pipe... FXTUL Automotive EVAP Smoke Machine Fuel Leak Detector Leak Down Tester with Dual-Modes 12V Car...
5 ANCEL S3000 Smoke Machine Automotive, EVAP Smoke Machine Diagnostic Leak Tester, Dual-Mode Vacuum... ANCEL S3000 Smoke Machine Automotive, EVAP Smoke Machine Diagnostic Leak Tester, Dual-Mode Vacuum...
6 ANCEL S1000 Automotive Evap Smoke Machine, Leak Detector with Air and Smoke Dual-Modes, 12V Car Pipe... ANCEL S1000 Automotive Evap Smoke Machine, Leak Detector with Air and Smoke Dual-Modes, 12V Car...
7 MR CARTOOL T130 Automotive EVAP Smoke Machine, Dual Mode 12V Car Fuel Pipe System Leak Tester... MR CARTOOL T130 Automotive EVAP Smoke Machine, Dual Mode 12V Car Fuel Pipe System Leak Tester...
8 ANCEL S3000 Automotive EVAP Smoke Machine Leak Detector with Oil Level Gauge & Air Flowmeter, 12V... ANCEL S3000 Automotive EVAP Smoke Machine Leak Detector with Oil Level Gauge & Air Flowmeter, 12V...
9 Romondes SM601 EVAP Smoke Machine Automotive Leak Detector, Vacuum Leak Tester, Diagnostic Fuel Pipe... Romondes SM601 EVAP Smoke Machine Automotive Leak Detector, Vacuum Leak Tester, Diagnostic Fuel...
10 MR CARTOOL T105 Automotive EVAP Detector Dual-Mode 12V Car Pipe System Leak Fuel Leakage Tester with... MR CARTOOL T105 Automotive EVAP Detector Dual-Mode 12V Car Pipe System Leak Fuel Leakage Tester...
11 ANCEL S2000 Automotive EVAP Smoke Machine Leak Detector Full Kit, Built-in Air Machine Car Vacuum... ANCEL S2000 Automotive EVAP Smoke Machine Leak Detector Full Kit, Built-in Air Machine Car Vacuum...
12 ANCEL S2000 Smoke Machine Automotive, EVAP Vacuum Leak Detector, Diagnostic Tester with Pressure... ANCEL S2000 Smoke Machine Automotive, EVAP Vacuum Leak Detector, Diagnostic Tester with Pressure...
13 Automotive Fuel Leak Detectors, 12V Smoke Leak Locator Tester ,Fuel Leak Detectors, Car PIPE Leakage... Automotive Fuel Leak Detectors, 12V Smoke Leak Locator Tester ,Fuel Leak Detectors, Car PIPE...
14 MR CARTOOL T100 Auto Smoke Machine EVAP Leak Tester, 12V DC Car Fuel Pipe Systems Testing Detector... MR CARTOOL T100 Auto Smoke Machine EVAP Leak Tester, 12V DC Car Fuel Pipe Systems Testing...
15 Car Smoke Machine, EVAP Smoke Leak Tester Detector, Automotive Fuel Leakage Diagnostic Tester, 2... Car Smoke Machine, EVAP Smoke Leak Tester Detector, Automotive Fuel Leakage Diagnostic Tester, 2...
16 EI009G Car Fuel Leak Detectors, Diagnostic, Automotive Fuel Pipe System Leak Tester with EVAP... EI009G Car Fuel Leak Detectors, Diagnostic, Automotive Fuel Pipe System Leak Tester with EVAP...
17 AUTOOL Automotive Smoke Machine 12V Car EVAP Leak Detector Diagnostic Tester AUTOOL Automotive Smoke Machine 12V Car EVAP Leak Detector Diagnostic Tester
18 INFICON Whisper, Ultrasonic Leak Detector, 711-202-G1 INFICON Whisper, Ultrasonic Leak Detector, 711-202-G1
19 AA009 Car Fuel Leak Detectors, Diagnostic, Automotive Fuel Pipe System Leak Tester with EVAP... AA009 Car Fuel Leak Detectors, Diagnostic, Automotive Fuel Pipe System Leak Tester with EVAP...
20 AUTOOL EVAP Vacuum Automotive Smoke Machine Leak Detector Diagnostic Tester AUTOOL EVAP Vacuum Automotive Smoke Machine Leak Detector Diagnostic Tester
Bestseller No. 1
AutoLine Pro Automotive Smoke Machine Leak Detector EVAP Vacuum Diagnostic Tester | Shop Series |...
  • 【 HIGH PERFORMANCE, PREMIUM BUILD】Made in the USA. Solid Thick Metal Construction for durability. Equipped with our brand new AutoLine Pro Ceramic...
  • 【 DIAGNOSE ALL TYPES OF LEAKS WITH ADAPTERS】Consistently smoke test EVAP systems, Vacuum leaks, low pressure Turbo leaks, Intake Manifolds,...
  • 【 PRECISE AND SAFE】Engineered 100% safe for all vehicles. Thick Smoke output detects even the smallest leaks. Every unit Is backed by 1 YEAR FULL...
  • 【 HOW DOES IT WORK?】(1) Fill with the included OEM Approved Smoke Fluid. The kit operates with the included OEM Approved Fluid or you may use your...
  • 【 FAST, FREE, & SAFE DELIVERY】ALL orders shipped out same day via Expedited Shipping Priority Mail (for same day, order before 12pm PST / 3pm...
Bestseller No. 2
AutoLine Pro Automotive Smoke Machine Leak Detector EVAP Vacuum Diagnostics Tester | Economy Series...
  • 【 HIGH PERFORMANCE】Made in the USA. The Economy Series version 2.0 outputs lots of smoke! It's compact, powerful, and all quality components have...
  • 【 DIAGNOSE ALL TYPES OF LEAKS】Consistently smoke test EVAP / Vacuum / exhaust / and more at a fraction of the cost.
  • 【 PRECISE AND SAFE】Engineered 100% safe for all vehicles. Thick Smoke output detects even the smallest leaks. Every unit Is backed by 1 YEAR FULL...
  • 【 HOW DOES IT WORK?】(1) Fill with the included OEM Approved Smoke Fluid. The kit operates with the included OEM Approved Fluid or you may use your...
  • 【 FAST, FREE, & SAFE DELIVERY】ALL orders shipped out same day via Expedited Priority Shipping! (for same day, order before 12pm PST / 3pm EST)...
Bestseller No. 3
Vacuum Car EVAP Smoke Machine Leak Detector Diagnostic Tester Built-in Pump 12V for Automotive Pipes...
  • ✅【CONVENIENT TOOL】The Vac-Leak Hunter is designed for detecting the leakage of pipe systems on cars, motorcycles, such as fuel pipe, air intake...
  • ✅【WORKING PRINCIPLE】Car Pipe leak Detector will change special oil(baby oil or mineral oil) into smoke, then blow smoke into sealed pipe system....
  • ✅【Easy to Use】 12V Leak Locator Tester can be powered by the car’s battery, Fill with 20-40ml of smoke oil, Connect detector with DC 12V...
  • ✅【 Automotive Machine Leak Detector Package & Wide Range of Applications】1x vacuum leak tester Main Unit, 1x Power cord (Length: 3.15inch), 1x...
  • ✅【Friendly Reminder】 To ensure your high-quality shopping experience, If you have any issues with using the smoke machine, please feel free to...
Bestseller No. 4
FXTUL Automotive EVAP Smoke Machine Fuel Leak Detector Leak Down Tester with Dual-Modes 12V Car Pipe...
  • 【MULTIPLE TEST FUNCTIONS】The smoke machine automotive leak detector supported crankcase system test, intake system test, car sealing test, fuel...
  • 【TWO-MODE】Air mode and smoke mode, the smoke detector built-in air pump and smoke generator, so it does not rely on additional air machine....
  • 【SPECIFICATIONS】The leak down detector built-in smoke generator with smoke output value: 0-8 L/min, power supply: 12V Vehicle battery, < 8Amp,...
  • 【EVAP SYSTEM SUPPORTED】It works on the EVAP system, it can help you apply with EVAP system of all vehicles, including auto, off-road, ATV, light...
  • 【INTELLIGENT PROTECTION】Automotive Leak Detection Machine has an intelligent protection device. If it exceeds the working limit. When the...
Bestseller No. 5
ANCEL S3000 Smoke Machine Automotive, EVAP Smoke Machine Diagnostic Leak Tester, Dual-Mode Vacuum...
  • 【🎁Extra Savings】Just click "Extra Saving" below the price and add both to your cart to receive a free RD100 car code reader worth $20.99, or a...
  • 💨【Safe for All Vehicles】ANCEL S3000 automotive smoke machine leak detector is made of thick solid metal, compact and durable. It heats up the...
  • 💨【Ideal for Checking All Types of Leaks】💨 ANCEL S3000 evap smoke machine comes with various auto smoke machine cone adapter, which can fit...
  • 💨【Easy-to-use Automotive Smoke Machine】💨 The operation to test for leaks is almost straightforward. after putting the desired EVAP smoke...
  • 💨【Adjustable Air Flowmeter+ Viewable Pressure Gauge&Oil Level+Dual Modes】💨ANCEL S3000 automotive smoke machine equipped with pressure gauge...
Bestseller No. 6
ANCEL S1000 Automotive Evap Smoke Machine, Leak Detector with Air and Smoke Dual-Modes, 12V Car Pipe...
  • 【Why You Need】The evap smoke machine troubleshoot 60% of car failures before car repairs. Getting involved with crankcase system test,...
  • 【How We Do】Professional automobile smoke leak detection tool, using visible smoke to quickly locate the leak hole, built-in smoke generator with...
  • 【2 Working Modes】Air mode and smoke mode, the air mode can help you test whether there is a leak in the pipe by injecting air into the pipe, and...
  • 【What You Get】Automotive smoke machine equipped with 8 ft power cord, 8.2 ft exhaust hose, 1*intake adapter, , 1*cone adapter, 1*intake bladder...
  • 【Apply in Where】Equipped with different accessories, testing different inlet pipes is never a dream. Not only can the vacuum leak smoke tester be...
Bestseller No. 7
MR CARTOOL T130 Automotive EVAP Smoke Machine, Dual Mode 12V Car Fuel Pipe System Leak Tester...
  • 【Smoke Machine T130】MR CARTOOL EVAP Leak Detector T130 is a professional machine for automotive pipe system leak detection. Can be used for EVAP...
  • 【Air Mode & Smoke Mode】Built-in air pump and smoke generator, so it does not rely on additional air machine, perfect for Mobile Automotive Repair!...
  • 【Flowmeter, Oil Level Meter & Pressure Gauge】Equipped with pressure gauge, oil level meter and adjustable flow meter. All data are clear at a...
  • 【Complete Set】Comes with 4.92ft Smoke Hose, EVAP Special Connector, Standard Cone Adapter, Power Cord Clamp, Valve Core Wrench, Airbag Adaptor,...
  • 【Worry-Free After-Sales】MR CARTOOL offers 24-month warranty and 7x24 hours friendly customer service to ensure your shopping experience. No need...
Bestseller No. 8
ANCEL S3000 Automotive EVAP Smoke Machine Leak Detector with Oil Level Gauge & Air Flowmeter, 12V...
  • 【Ideal EVAP Smoke Machine】ANCEL S3000 is a professional machine for automotive pipe system leak detection, will help you find the leak and decide...
  • 【Easy to Use】Throuth heating mineral oil or baby oil into smoke, and then pressing it into the sealed pipeline system, it can be outputs lots of...
  • 【Independent Switch】+【Intelligent Protection】S3000 smoke tester adopt independent switch control design, air mode switch independent...
  • 【Wide Range of Applications】+【Complete Accessories】S3000 is used to detect leaks in piping systems in automobiles, motorcycles, snowmobiles,...
  • 【Main Unit 12 months Warranty】To ensure your high-quality shopping experience, there are 12 months warranty of the main unit from the date of the...
Bestseller No. 9
Romondes SM601 EVAP Smoke Machine Automotive Leak Detector, Vacuum Leak Tester, Diagnostic Fuel Pipe...
  • 【Diagnose All Types of Leaks】As a professional smoke machine automotive, SM601 can help you to locate hard-to-find leaks in any sealed system,...
  • 【Portable Design & Safe】 Romondes SM601 EVAP smoke machine comes with a hook allows you to easily store anywhere in the workshop. The automotive...
  • 【Easy to Use and Efficient】SM601 smoke leak tester is easy to operate. Just four simple parts, easy to fix. This car smoke machine can help you...
  • 【Works with Most Cars】SM601 vacuum leak tester could be used on all cars, motorcycles, snowmobiles, ATV, light trucks, boats, etc, and wide...
  • 【What You Get】A automotive smoke leak detector, 1*Power Cord, 1*EVAP Kit, Air Adapt(U.S. Standard), 1*Smoke Delivery Hose,1*Hook. FREE Gift: BT200...
Bestseller No. 10
MR CARTOOL T105 Automotive EVAP Detector Dual-Mode 12V Car Pipe System Leak Fuel Leakage Tester with...
  • 【Smoke Machine T105】MR CARTOOL EVAP Leak Detector T105 is a professional machine for automotive pipe system leak detection. Can be used for EVAP...
  • 【Air Mode & Smoke Mode】Built-in air pump and smoke generator, so it does not rely on additional air machine, perfect for Mobile Automotive Repair!...
  • 【Pressure Gauge】Equipped with a liquid filled pressure gauge, by observing the change of the pressure gauge value, it is easier to find small...
  • 【Complete Set】Comes with 4.92ft Smoke Hose, EVAP Special Connector, Standard Cone Adapter, Power Cord Clamp, Valve Core Wrench, Airbag Adaptor,...
  • 【Worry-Free After-Sales】MR CARTOOL offers 24-month warranty and 7x24 hours friendly customer service to ensure your shopping experience. No need...
Bestseller No. 11
ANCEL S2000 Automotive EVAP Smoke Machine Leak Detector Full Kit, Built-in Air Machine Car Vacuum...
  • 【WHAT CAN IT DO?】The smoke leak detector can do smoke testing of multiple systems, such as EVAP systems, Intake Systems, Cooling / EGR /Exhaust...
  • 【NO NEED TO CONNECT AIR SUPPLY】Small body equipped with air pump and smoke generator can quickly generate air and smoke, improve the efficiency of...
  • 【NEVER MISS A LEAK】A powerful pressure gauge was installed, and each leak was found accurately by the change of the gauge value. When the pressure...
  • 【COMPLETE ACCESSORIES】Automotive smoke machine with 8.2 ft Smoke Delivery Hose, 8 ft Power Cord, Intake Adapter, Cone Adapter and Intake Adapter...
  • 【24/7 TECHNICAL SUPPORT】ANCEL's official store offers a 30-day money back guarantee, hassle-free warranty and lifetime customer support. For...
Bestseller No. 13
Automotive Fuel Leak Detectors, 12V Smoke Leak Locator Tester ,Fuel Leak Detectors, Car PIPE Leakage...
  • [HOW TO WORK]: Firstly fill 20ml test oil, then simply connect the DC12V battery, it starts to work. Soon thick smoke outputs into sealed pipe system....
  • [WHY IS IT NEEDED]: Must-have tool for vehicle techs. The AUTOOL SDT 202 has its own Air Pump without relying on other machines and Pressure Gauge...
  • [WHAT IS ITS STANDOUT]: SDT202 smoke tester is detachable, compact, and easy to store, time-efficient and labor-free, and is widely used in various...
  • [WHERE TO USE]: Quickly smoke test for EVAP systems, Turbo leaks, Intake System, Exhaust Systems, Cooling System, Car Sealing, Fuel Tank System,...
  • [3-YEAR WARRANTY]: For damage caused by non-human factors, we promise to resend parts for free within 3 years. For any needs, you are warmly welcomed...
Bestseller No. 14
MR CARTOOL T100 Auto Smoke Machine EVAP Leak Tester, 12V DC Car Fuel Pipe Systems Testing Detector...
  • 【Multi Functions】Tightness Test, Intake System Test, Exhaust System Test, Cooling System and Overheating Protection. Built-in air pump and smoke...
  • 【Fast Smoke Output】The smoke can be produced within 10 seconds, and with stable and large amount of smoke output after switch-on (by heating up...
  • 【Convenient Design】Comes with a hook allows you to hang it on your hood latch, the conical adapter will fit most intakes, and the 1.5m smoke hose...
  • 【Easy Operation and Safe】Thick smoke output detects even the smallest leaks. The smoke leakage tester is equipped with assortment of adapters for...
  • 【Worry-Free After-Sales】MR CARTOOL offers 24-month warranty and 7x24 hours friendly customer service to ensure your shopping experience. No need...
Bestseller No. 17
AUTOOL Automotive Smoke Machine 12V Car EVAP Leak Detector Diagnostic Tester
  • 【POWERFUL EVAP SUPPORT】EVAP special connector can help you use with EVAP System of all vehicles to quickly find out the leak parts and come with...
  • 【WIDE COMPATIBILITY】The pipe fuel leakage detector is designed for detecting the leakage of pipe systems on cars, motorcycles, snowmobiles,...
  • 【Perfect Protection Mechanism】The protection measures of this product are very good. There are four kinds of protection measures: such as oil...
  • 【Independent Switch Control】DesignRegarding to the air mode, it has independently controlled built-in air pump. And for the smoke mode, it come...
  • 【 FAST SAFE DELIVERY, QUALITY ASSURANCE】Shipment by Amazon.Our Worry-free 36-month warranty and friendly customer service in 24-hour by amazon...
Bestseller No. 18
INFICON Whisper, Ultrasonic Leak Detector, 711-202-G1
  • Detects pressure and vacuum leaks for all gases
  • Hear the leak using the included headphones
  • Works even in noisy environments
  • Laser pointer makes it easier to pinpoint the leak
  • Applications include pressure/vacuum leaks, electrical arcing, malfunctioning steam traps, and more
Bestseller No. 19
AA009 Car Fuel Leak Detectors, Diagnostic, Automotive Fuel Pipe System Leak Tester with EVAP...
  • Easy to Use--It can be powered by the car’s battery, and Shop Air driven to increase duribility and ensure big smoke flow. It in quick smoke...
  • Convenient Tool for Mechanics -- Fuel Leak Detector designed for detecting the leakage of pipe systems on cars, motorcycles, snowmobiles, ATV, light...
  • Specifications--Voltage: DC 12V. Smoke output pressure:0.5PSI. Smoke output volume: <8LPM. Smoke current: 6 AMP.
  • Great Smoke Flow Control: Turn the red handle anti-clockwise to adjust the flow rate to a proper level
  • Application-EVAP System, Gaskets & Fitting, Throttles Shafts, Catalytic Converters. Head & tail lamp housing, EGR valves, Hoses, Brake Booster,...
Bestseller No. 20
AUTOOL EVAP Vacuum Automotive Smoke Machine Leak Detector Diagnostic Tester
  • 【Why Need It】For example: 1. The rupture of the vacuum hose will cause the mixture to be too thick, the idle speed will increase, the hot car will...
  • 【Built-in Air Pump】Customers do not need to purchase additional air pumps, we use high-quality materials, after many tests, please rest assured to...
  • 【EVAP Detection】American cars that began production in 1996 are equipped with EVAP service ports; in most American cars, the EVAP service port is...
  • 【External Pressure Gauge】You can observe the barometer to more accurately determine whether the car pipeline is leaking. If the barometer index...
  • 【External Flow Meter】You can easily control the air pressure, because the air pressure of each pipe in the car is different. If the air pressure...

Having trouble finding a great Car Vacuum Leak Detector?

This problem is well understood by us because we have gone through the entire Car Vacuum Leak Detector research process ourselves, which is why we have put together a comprehensive list of the best Car Vacuum Leak Detectors available in the market today.

After hours of searching and using all the models on the market, we have found the best Car Vacuum Leak Detector for 2022. See our ranking below!

How Do You Buy The Best Car Vacuum Leak Detector?

Do you get stressed out thinking about shopping for a great Car Vacuum Leak Detector? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching Car Vacuum Leak Detector, which is why we have assembled a comprehensive list of the greatest Car Vacuum Leak Detector available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Car Vacuum Leak Detector that you consider buying. Your questions might include the following:

  • Is it worth buying an Car Vacuum Leak Detector?
  • What benefits are there with buying an Car Vacuum Leak Detector?
  • What factors deserve consideration when shopping for an effective Car Vacuum Leak Detector?
  • Why is it crucial to invest in any Car Vacuum Leak Detector, much less the best one?
  • Which Car Vacuum Leak Detector are good in the current market?
  • Where can you find information like this about Car Vacuum Leak Detector?

We’re convinced that you likely have far more questions than just these regarding Car Vacuum Leak Detector, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Car Vacuum Leak Detector, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Car Vacuum Leak Detector. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an Car Vacuum Leak Detector buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Car Vacuum Leak Detector currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Car Vacuum Leak Detector has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Car Vacuum Leak Detector?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Car Vacuum Leak Detector.
  5. Customer Ratings: Number ratings grade Car Vacuum Leak Detector objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Car Vacuum Leak Detector.
  7. Product Quality: You don’t always get what you pay for with an Car Vacuum Leak Detector, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Car Vacuum Leak Detector is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining Car Vacuum Leak Detector information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Car Vacuum Leak Detector is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

Related Post:

FAQ:

Q: What happens to a car with a vacuum leak?

A: Common Symptoms of an Engine Vacuum Leak Engine Running Problems. An engine with a vacuum leak could potentially run normally, but it may idle faster than usual, idle roughly, misfire, hesitate, or stall. Fuel Economy and Emissions. … Check Engine Light. … Engine Damage. … Other Issues. …

Q: How can I check for a vacuum leak?

A: In order to find a leak you can test individual hoses to see if they hold pressure. Purchase a vacuum gauge from your local auto parts store and hook it up to the suspect hose. Then start the car and let it idle for a few minutes. Once the car is warmed up, you can get an accurate reading on the guage.

Q: How do you check for vacuum leaks?

A: To check for a leak in your vacuum, you will need: Phillips screwdriver. Flathead screwdriver. Duct tape. Rubber cement. Replacement vacuum bag. Thoroughly inspect the vacuum. Remove the bag from the vacuum and inspect it for holes.

Q: What causes a vacuum leak in a car?

A: A vacuum leak is any leak caused when sucking in Air either after the throttle plate of a. carburetor or after the Air Metering device on a Fuel Injected car caused by a bad gasket, torn boot, improperly installed adapter plate or manifold gasket, etc.