Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSDODGE AND RAM1990DAKOTA LE, 2D PICKUP, 3.9 X, 4WD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTING - V6MINIMUM AIRFLOW TESTS3.3L
1990 Dodge and Ram Dakota LE, 2D Pickup, 3.9 X, 4WD, Automatic
Minimum Airflow Tests: 3.3L
1990 Dodge and Ram Dakota LE, 2D Pickup, 3.9 X, 4WD, AutomaticSECTION 3.3L
- Ensure engine is at operating temperature. Shut engine off. Disconnect PCV valve hose from intake manifold nipple.
- Attach Orifice (6457) to intake manifold nipple. Orifice size is .125" (3 mm). Disconnect 3/16" idle purge line from throttle body nipple. Cap nipple.
- Connect Diagnostic Readout Box II (DRB-II). Start engine. Let engine idle for at least one minute.
- Using DRB-II, access MINIMUM AIRFLOW IDLE SPEED mode. When this mode is accessed, AIS motor will fully close, spark advance will be fixed and idle RPM will be displayed on DRB-II.
- Check idle speed. See MINIMUM AIRFLOW IDLE SPEED table. If minimum airflow idle speed is not within specifications, replace throttle body. Disconnect all test equipment.
MINIMUM AIRFLOW IDLE SPEED
| Application | RPM |
|---|---|
| 3.0L | 750-950 |
| 3.3L | 700-950 |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.