Fuel, Air, EFI, Carburetion and Ignition Checklist
Vacuum Leak and Intake Air Checklist
An air-leak worksheet for lean idle, hanging rpm, rough running and false sensor readings.
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Checklist Preview
- Air leak: inspect intake boots for cracks
- Air leak: check clamps and vacuum caps
- Air leak: listen for leak only as an initial clue
- Air leak: use smoke test where possible
- Air leak: watch fuel trims or idle correction
- Air leak: check brake booster line on automotive systems
- Air leak: inspect PCV/crankcase ventilation
- Air leak: confirm throttle body and gasket sealing
- Air leak: repair before fuel tuning
- Air leak: record before/after idle and trim behavior
How To Use It
Use this checklist before replacing parts. Work from the top down, record the result of each step, and only move to repair decisions when the failed test is clear.
The downloadable PDF includes checkboxes, notes space, final verification and technician sign-off fields for workshop records.
Download Access
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Tools To Prepare
- Fuel pressure gauge
- Noid light or scope
- Spark tester
- Vacuum gauge
- Scan tool
Evidence To Record
- Fuel pressure
- Sensor plausibility
- Spark quality
- Mixture correction
SEO and Research Notes
This original Motomech worksheet is built from common workshop inspection logic: verify the complaint, inspect safety-critical systems first, measure before replacing parts, document the failed test, and finish with a repeatable road-test or service verification.
