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.
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HOMESERVICE MANUALSDODGE AND RAM1999DAKOTA SLT, 2D PICKUP, 3.9 X, 4WD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODESSELF-DIAGNOSTIC TESTSNTC-13A: CHECKING ENGINE MECHANICAL SYSTEMS
1999 Dodge and Ram Dakota SLT, 2D Pickup, 3.9 X, 4WD, Standard
NTC-13A: Checking Engine Mechanical Systems
1999 Dodge and Ram Dakota SLT, 2D Pickup, 3.9 X, 4WD, StandardSECTION NTC-13A: Checking Engine Mechanical Systems
NOTE:
If coming to this test from a Heated Oxygen Sensor (HO2S) test, and rich or lean condition is not corrected after checking items listed below, replace Powertrain Control Module (PCM). Perform TEST VER-2A.
- At this point in diagnostic test procedure, all engine control systems have been determined to be operating as designed and not causing a driveability problem. Following additional items should be checked as possible causes:
- Ensure engine vacuum is at least 13 in. Hg In Neutral:
- Check valve timing:
- Check engine compression:
- Check for exhaust system restrictions:
- Check PCV system for proper function:
- Ensure engine drive sprocket is properly positioned:
- Check torque converter stall speed (A/T):
- Check power brake booster for internal vacuum leak:
- Check for fuel contamination:
- Ensure injector control wire is connected to correct fuel injector and injector is not plugged or restricted:
- Check for pertinent Technical Service Bulletins (TSBs):
- If equipped with distributor, set distributor position. Go to next step.WARNING: Avoid contact with moving engine parts.
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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.