2002 Traxter Autoshift XL/XT Shop Manual, Page 52Get this manual
Section 03 ENGINE Subsection 02 (TROUBLESHOOTING)
ENGINEGENERAL
SYMPTOM CONDITION TestInspection ENGINE BACKFIRESNORMAL USE1Check spark plugs andor electrical systemaCarbon accumulation caused by defective spark plugsClean carbon accumulation and replace spark plugsbElectrical system has failureReplace defective part(s)2Check leakage on intake manifoldaAir leak on intake systemRetighten screws andor replace intake manifold3Check exhaust air leakingaExhaust gasket is leakingRetighten screws andor replace exhaust gasketbExhaust spring area is leakingReinstall or change exhaust springs4Check valve(s) for leakingaValve(s) is(are) leakingPerform leak down test then repair or replace valve(s)5Check if fuel supply is to less at high RPMaFuel line is contaminated andor bent (engine gets lean)Clean andor replace defective part(s)bGas tank cap is pluggedClean andor change tank capcCheck if carburetor is dirtyClean carburetor parts