Hello people.
I'm having some trouble with my VW Polo Mk4 '04 1.2L petrol (AWY engine/40kw).
The engine is working rough and is shaking/rattling quite a bit during all types of load (not just idle).
Also, as I'm revving the engine and letting off the gas pedal, I can hear a slight knocking sound (just a singe one at a time).
The cold start is quite bad too and it's when the issue seems to be at its worst.
The ECU is giving me absolutely zero codes, which is not helping at all.
So here's a list of the things I've already checked and replaced:
Coils and sparkplugs.
Engine oil/filters.
Engine mounts.
I've also been filling the fuel reservoir with high quality fuel and additional additives, just in case any of the fuel components have clogged up a bit.
As mentioned above, I'm getting no misfires and I'm losing no power,
yet the engine is rattling.
I don't hear any metal grinding/slacking etc. from the engine, so I assume that there's no issues with the timing components,
as the timing chain for example (which would also most likely throw an error code).
I've been to 3 repair shops, out of which none could identify where the issue is coming from.
I'm all open for suggestions
P.S.
I've been looking through the live data of the ECU
and the only "abnormal" work that I'm seeing, is from the O2B1S2 sensor (Oxygen sensor post catalytic converter),
of which the Voltage should be relatively constant/linear, averaging around 0.6V,
whereas mine is following the voltage of the fluctuating O2B1S1 sensor, which is constantly changing between 0.1 and 0.8V.
So I was wondering if the catalytic converter has gone bad and is causing all the trouble,
but yet again, wouldn't that throw an error code?
I'm having some trouble with my VW Polo Mk4 '04 1.2L petrol (AWY engine/40kw).
The engine is working rough and is shaking/rattling quite a bit during all types of load (not just idle).
Also, as I'm revving the engine and letting off the gas pedal, I can hear a slight knocking sound (just a singe one at a time).
The cold start is quite bad too and it's when the issue seems to be at its worst.
The ECU is giving me absolutely zero codes, which is not helping at all.
So here's a list of the things I've already checked and replaced:
Coils and sparkplugs.
Engine oil/filters.
Engine mounts.
I've also been filling the fuel reservoir with high quality fuel and additional additives, just in case any of the fuel components have clogged up a bit.
As mentioned above, I'm getting no misfires and I'm losing no power,
yet the engine is rattling.
I don't hear any metal grinding/slacking etc. from the engine, so I assume that there's no issues with the timing components,
as the timing chain for example (which would also most likely throw an error code).
I've been to 3 repair shops, out of which none could identify where the issue is coming from.
I'm all open for suggestions
P.S.
I've been looking through the live data of the ECU
and the only "abnormal" work that I'm seeing, is from the O2B1S2 sensor (Oxygen sensor post catalytic converter),
of which the Voltage should be relatively constant/linear, averaging around 0.6V,
whereas mine is following the voltage of the fluctuating O2B1S1 sensor, which is constantly changing between 0.1 and 0.8V.
So I was wondering if the catalytic converter has gone bad and is causing all the trouble,
but yet again, wouldn't that throw an error code?