88 486 PL ENGINE P 5. Poor acceleration/ g) Faulty pressure regulator g) Check & replace power (continued) h) Fuel pump faulty h) Check & replace i) Phase sensor signal incorrect i) Check for gap between the phase sensor & pin on cam shaft & correct it. j) Valve timing incorrect j) Check & correct k) Catalytic converter damaged k) Check & replace if required l) Worn out piston rings/seized pistons l) Overhaul & replace affected parts 6. Knocking a) Spark plugs defective / a) Check & replace / Use specified spark unspecified spark plugs plug b) Adulterated fuel b) Use specified/proper fuel c) Knock sensor signal incorrect c) Check & correct 7. Misfiring a) Fault with engine management a) Check for any EMS fault using blink system. (EMS) signal system or code method or KTS300. Take wiring harness corrective action accordingly. b) Spark plugs defective / Incorrect b) Check spark plug gap. Set it or replace if required. c) Clogged injectors c) Check & replace d) Adulterated fuel d) Use specified proper fuel e) Phase sensor signal incorrect e) Check for gap between the phase sensor & pin on cam shaft. Set & correct the gap if required. f) Valve timing incorrect f) Check & correct g) Loose / improper (-ve polarity) g) Check for proper earth contact on the earthing junctions connections vehicle. Refer vehicle & EMS wiring diagram. 8. Whitish / bluish a) Clogged air filter a) Replace smoke b) Adulterated fuel b) Use specified / proper fuel c) Worn out piston rings / seized pistons c) Overhaul & replace affected parts d) Valve guide seal leaking d) Check & replace 9. High Fuel a) Low battery voltage a) Recharge the battery Consumption b) Spark plugs defective / Incorrect b) Check & replace c) Clogged injectors c) Check & replace d) Adulterated fuel d) Use specified proper fuel e) Intake manifold leakage e) Check & rectify f) Faculty fuel pressure regulator f) Check & replace g) Incorrect phase sensor gap g) Check & set correct gap h) Catalytic converter damaged h) Check & replace i) Valve timing incorrect i) Check & rectify j) Worn out piston rings & Seized j) Overhaul & replace affected parts pistons Sr. Problem Observed Probable Cause Action to be taken no.
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