Serious problem in 4AGE startup :(

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Serious problem in 4AGE startup :(

Hello everybody. The swap was done but startup turnd out to be a problem. When the engine was diagnosed, it was the ECU. ECU is faulty. I need an ECU for a 4AGE 20v silvertop. Anyone has one?

Gari.pk User 1881 asked on 23 Jun 2010 17:06:20 pm

1 Answer

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Rehan - on 23 Jun 2010 17:06:32 pm

An open or short circuited 02 sensor will trip the CEL. Similarly the amplitude or output must be within a certain criteria for it trigger a CEL. What happens usually is that the lead in our fuel contaminates/chokes the filament causing an improper reading. The ECU does not detect a short although the sensor is malfunctioning. Not only will the 20v give off a check light for the o2 snesor it will also give off a check light if you're running too lean. The codes are
21 for 02 sensor.
25 for A/f Lean.
Although do note that both the above codes plus a few others are activated with Dual trip detection cycle. This means the engine needs two runs before a confirmed reading as to eliminate the posibility of a ghost Mil. The procedure is to Short diagnosis terminals E1 & TE1, check code, turno of ignition, remove negative terminal for 20seconds or more, reattach terminal, short the terminals again and check code.