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P2098-DOWNSTREAM FUEL TRIM SYSTEM 2 LEAN (CONTINUED) 2. EXHAUST LEAK Turn the ignition off. WARNING: To avoid personal injury from the exhaust system being hot, allow the exhaust to cool down to Is the exhaust system is good condition? Yes >> Go To 3 No >> Repair or Replace as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 3. ENGINE MECHANICAL Check for any of the following conditions/mechanical problems. AIR INDUCTION SYSTEM - must be free from leaks ENGINE VACUUM - must be at least 13 inches in neutral ENGINE VALVE TIMING - must be within specifications ENGINE COMPRESSION - must be within specifications ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks ENGINE PCV SYSTEM - must flow freely TORQUE CONVERTER STALL SPEED - must be within specifications POWER BRAKE BOOSTER - no internal vacuum leaks FUEL - must be free of contamination FUEL INJECTOR - plugged or restricted injector; control wire not connected to correct injector Are there any engine mechanical problems? Yes >> Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 4 9 - 872 ENGINE ELECTRICAL DIAGNOSTICS WK |