Mga boss need ko ng advice on my Honda d15b engjne.

The idling problem happens ONLY when AC is off. Otherwise, OK naman ang idling. Idling is stable with AC ON or OFF.

Below situation is while AC is off and engine is at operating normal temperature.

On a full stop, idling is normal.
Kapag nag-shift to 1st gear (2nd, 3rd gear etc) to 1500rpm and then neutral, the idling stays at 1500rpm. Idling will only go back to normal (around 800rpm) on a full stop.


Troubleshooting done but still did not solve the problem:
- cleaned throttle body and iacv
- tried re-arranging the accelerator cable

This problem happened all of a sudden. Walang modification na ginawa sa engine before this occurred.

Would appreciate any leads.


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