Intake/Exhaust Restriction Test: Purpose
WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
This purpose of this test is to determine if an intake air or exhaust restriction is contributing to a no start or hard start condition. If the engine starts with a high intake air or exhaust restriction, a considerable amount of black/blue smoke is produced.
Intake/Exhaust Restriction
- Inspect the air filter and inlet ducts.
- Inspect the exhaust system.
- Check for illumination of the air filter restriction indicator.
| Method | Check |
|---|---|
| Visual |