Question about Toyota Corolla
THE CHECK ENGINE LIGHT IS CONTROLED BY THE COMPUTER FROM INPUT SENSOR FOR THE EMISSION SYSTEM , IT IS ASSUMED THAT IF A CARS EMISSION SYSYEM IS FAILING THERE IS A POTENTIAL MALFUNCTION IN THE ENGINE. ONLY A DIAGNOSTIC CAN TELL U WHICH SENSOR IS MALFUNCTIONING.
Posted on Aug 11, 2008
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Posted on Jan 02, 2017
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Aug 25, 2014 | 1995 Toyota Corolla
Oct 27, 2011 | 2004 Suzuki Forenza
Replace spark plugs
Check distributor cap (replace if necessary)
Check timing (adjust if necessary)
Check ignition wires (replace if necessary)
Check ignition performance (firing voltage and ignition patterns)
Check idle speed (adjust if necessary)
Check choke (carbureted engines)
Clean fuel injectors
Check compression and/or power balance (identifies bad fuel injectors as well as compression problems)
Check manifold intake vacuum (reveals exhaust restrictions)
Check battery/charging voltage
Check exhaust emissions (verifies fuel mixture, ignition performance and emissions performance)
Check vehicle computer for trouble codes
Install new air filter
Replace fuel filter
Replace PCV valve
Check all emission controls (EGR valve, air pump, etc.)
Check all vital fluid levels (engine oil, transmission fluid, coolant, brakes, power steering)
Check belts and hoses
Check safety items such as lights, wipers, tires (including inflation pressure), horn, etc.
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