[s-cars] New ECU Chips from Mihnea - My 2 Cents

[FvAMI at aol.com]

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In a message dated 10/10/03 7:30:34 AM Pacific Daylight Time,
rebank at sbcglobal.net writes:


> When the car was first initially driven with the new set, the MLI light
> ("CHECK" light) would come on and off.  The light would come on when rpms were
> falling and go off when some throttle was applied.  The code was "Oxygen
> sensor limits out of adjustment".  The code was cleared but came back.  Now, after
> about 3 days of driving, the light disappeared, (don't know about the code,
> have not had a chance to check it yet).
>
>

Could be many issues but here are some possible causes -

1) Bad O2 Sensor.
2) Cold solder Joints.
3) Incompatible or out of spec EPROM.
4) Minor ESD damage to ECU.

I would not consider a check engine light normal under any circumstances A
good upgrade will definitely not trigger a check engine light if everything else
in the car is 100%.

Best regards,
Feico van der Laan