ENGINE 273 MPFI 59 ENGINE GENERAL SYMPTOMS AND DIAGNOSIS 1. ENGINE NOT CRANKING Low battery voltage Clean and tighten the connectors. Jump start using another battery. Get battery charged or changed. Faulty starter Rectify, Repair or replace Worn out piston rings/seized pistons Overhaul & replace affected parts. Faulty immobilizer (if fitted) Check and rectify 2. ENGINE CRANKS BUT NOT START Clogged air filter Clean as per the instructions Incorrect valve timing Set valve timing /check & reset Faulty spark plugs Clean, check gap/replace if necessary Faulty crank angle sensor Check & correct the gap Faulty water temperature sensor Check & replace if necessary Faulty TMAP sensor Check & replace if necessary Faulty throttle position sensor Check & replace if necessary Faulty IACV valve Check & replace if necessary Clogged injectors Check & replace if necessary Faulty fuel supply unit Check & replace if necessary Clogged fuel filter Replace Faulty ignition coil Check and replace if necessary Faulty firing order/ injector Check and replace (connection) order Faulty E C U Replace Faulty Fuel Pump Check and replace if necessary 3. ERRATIC IDLING Intake manifold leakage Check and rectify vacuum connections Valve timing incorrect Set valve timing /check & reset Vehicle speed signal faulty Check & replace. IACV valve faulty Check & replace Faulty firing order/injector order Check and rectify Faulty throttle position sensor Check & replace 4. DOES NOT IDLE Faulty TMAP sensor Check & replace Faulty IACV Valve Check & replace Faulty fuel Supply unit Check & replace 5. MAXIMUM RPM LOW Battery voltage low Check and tighten connections. Jump start using good battery or get battery charged/changed. Clogged air filter Clean as per instructions Valve timing incorrect Set valve timing /check & reset Spark plugs defective Clean and check gap/replace if reqd. Adulterated fuel Flush the system and refill Faulty crank angle sensor Check the gap 1.5 + 0.5 mm Check sensor. Replace if found faulty. Clogged injectors Check and Replace if found faulty
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