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 RAM1995PICKUP R3500, 2D PICKUP, 8.0 W, RWD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 3.9LSELF-DIAGNOSTIC TESTSTEST NTC-16A - NO TROUBLE CODE MECHANICAL TESTNOTES
1995 Dodge and Ram Pickup R3500, 2D Pickup, 8.0 W, RWD, Automatic
Test NTC-16A - No Trouble Code Mechanical Test: Notes
1995 Dodge and Ram Pickup R3500, 2D Pickup, 8.0 W, RWD, AutomaticSECTION Notes
NOTE:
If coming to this test from O2S test, and rich or lean condition is not corrected after checking items listed below, replace Powertrain Control Module (PCM).
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:
- Check distributor position. See CHECKING DISTRIBUTOR POSITION.
- Check if any Technical Service Bulletins (TSBs) apply to vehicle.
- Check engine vacuum. It must be at least 13 in. Hg in Neutral.
- Check valve timing.
- Check engine compression.
- Check for exhaust system restriction.
- Ensure PCV system is functioning properly.
- Check camshaft and crankshaft sprockets.
- Check torque converter stall speed.
- Check power booster for internal vacuum leak.
- Check for fuel contamination.
- Ensure injector control circuit is connected to correct fuel injector and injector is not plugged or restricted.
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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.