How does the Nissan QG18DE ignition system work?
The Nissan QG18DE ignition system is controlled by the ECU to maintain the best air-fuel ratio for every running condition of the engine. The ignition timing data is stored in the ECM, this data forms the map shown. The ECM receives information such as the injection pulse width and camshaft position sensor signal.
What does the ECM do on a Nissan QG18DE?
The QG18DE engine uses the ECCS (Electronic Concentrated engine Control System). This system controls the fuel injection, ignition timing and idle RPM as one single control unit. The amount of fuel injected from the fuel injector is determined by the engine ECM.
What’s the compression ratio on a Nissan QG18DE?
The engine version without variable valve timing system (NVCT) was also available. The engine has the same cylinder block with QG16DE, but cylinder bore is enlarged to 80.0 mm (3.15 in), piston stroke is the same 88.0 mm (3.46 in). Compression ratio is 9.5:1.
What are the intake and exhaust valves on a Nissan QG18DE?
Intake valves duration is 236° and exhaust valves duration is 222° for engines with valve timing control system and 222°/222°, respectively for engines without NVCTS. The QG18DE does not have hydraulic lifters, so special shims are used to adjust the valve clearance.
The Nissan QG18DE ignition system is controlled by the ECU to maintain the best air-fuel ratio for every running condition of the engine. The ignition timing data is stored in the ECM, this data forms the map shown. The ECM receives information such as the injection pulse width and camshaft position sensor signal.
The engine version without variable valve timing system (NVCT) was also available. The engine has the same cylinder block with QG16DE, but cylinder bore is enlarged to 80.0 mm (3.15 in), piston stroke is the same 88.0 mm (3.46 in). Compression ratio is 9.5:1.
The QG18DE engine uses the ECCS (Electronic Concentrated engine Control System). This system controls the fuel injection, ignition timing and idle RPM as one single control unit. The amount of fuel injected from the fuel injector is determined by the engine ECM.
Why did my Nissan Maxima timing chain fail?
One plaintiff claims her 2007 Nissan Maxima timing chain failed when the vehicle had 127,000 miles on the odometer, a job that cost her $1,500. Other plaintiffs allege they paid similar amounts, and some customers must pay for complete engine replacements once the timing chain tensioning systems damage the engines.