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Misfire Recognized - Cylinder No. 3 DTC P0304/16688 Possible Effects Possible effect is reduced power. Engine runs rough. Increased emissions. Test Requirements Ensure battery voltage is at least 11.5 volts. Ensure all electrical accessories are off and A/C is off. Ensure Test Procedure 1. Remove engine cover. Disconnect 10-pin electrical connector, on diesel injection pump. See COMPONENT LOCATIONS . 2. Disconnect connectors from glow plugs. Remove all glow plugs. 3. Thread in VAG 1381/12 adaptor in place of glow plugs. Check compression using VAG 1763 4. Check compression readings against specifications. See COMPRESSION SPECIFICATIONS table. If any cylinder reading is not as specified, repair as necessary. Glow plug tightening torque is 11 ft. lbs. (15 COMPRESSION SPECIFICATIONS DTC P0321/16705 & DTC P0322/16706 NOTE: Follow manufacturers operating instructions for correct use of Application (1) Specification Normal Compression Pressure (New Engine) Beetle, Golf & Jetta 1.9L Turbo Diesel 363-450 psi (25.0-31.0 bar) Minimum Compression Pressure 1.9L Turbo Diesel 276 psi (19.0 bar) Maximum Variation Between Cylinders 1.9L Turbo Diesel 73 psi (5.0 bar) (1) Operate starter until tester shows no further increase.
2003 Volkswagen New Beetle GLS 2002-2004 ENGINE PERFORMANCE Self-Diagnostics - 1.9L Turbo Diesel - Beetle, Golf & Jetta (Engine Code ALH)
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