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My Toyota Corolla 4af 16 valves GLS 1989 model back fire cotinously. Valve timing and ignition timing correct.it is an electronic distributor, The problem started three days ago by missfiring and looses power.
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Usually the oil SAE Weight is imprinted onto the oil filler.
Toyota Corolla 4A-F engine. Owners manual says API SF/CC or SG SAE from 5W-30 to 20W-50 Oil Change Interval recommended every 5000 miles under severe conditions.
The Year 1998 Toyota Corolla engine will stall due to:
Spark plug faulty
High-tension cord faulty
Ignition problems:
• Ignition coil
• Igniter
• Distributor
Incorrect ignition timing
Vacuum leaks:
• PCV line
• EGR line
• Intake manifold
Throttle body
• Brake booster line
Incorrect valve clearance
EFI system problems
Engine overheats
Low compression
this is easy if you can find parts meant for it. Need a distributor, a crank sensor and pulley with a reference point for the sensor, a control module, coil, cap, rotor, wires, and you should be good to go.the CKP (crank sensor) tells the module when to fire, the module fires the coil, and the distributor determines basically when it fires in terms of milliseconds (basic timing), same as with points. The timing via distributor is necessary since the fuel is not controlled via CMP (cam sensor). otherwise the distributor would be fixed and the computer would control fuel volume/timing and ignition timing at the same time, and since there is no reference for the fuel or valve timing, the module has no way to determine the most effective timing therefore simply fires when the crank passes the sensor.
check the distributor to make sure that the rotor is pointing at the no. 1 cylinder when that cylinder is at top dead center on the compression stroke. It sounds like your distributor rotor is 180 degrees out of time. The engine will run but will do what yours is doing.
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