I'm experiencing some car issues and would appreciate some assistance. I enjoy DIY work, but I also have a mechanic friend who helps me when he's available.

Firstly, my car has rough idling and occasionally stalls when it rains. It seems like water affects the circuitry due to a previous leak at the top of the windscreen. Although I had the leak fixed, the job wasn't done thoroughly, so I need to return to address the issue.

I've scanned the car, but there are no error codes, and there are no misfires detected.

Secondly, I'm still facing rough idling problems, particularly when I try to reverse, especially on higher ground. The car tends to stall, and I have to press the accelerator forcefully. The nozzles were recently serviced, and the spark plugs are less than three months old.

Additionally, there's a thumping sound coming from the engine bay when the car shifts gears at slow speeds, especially in traffic. Despite replacing the rear engine mount, the issue persists. However, the gear shifting itself seems fine.

As a bonus question, I'd like to know why my car revs high before shifting gears and sometimes lurches forward during the gear change.

I would greatly appreciate recommendations and advice as I plan to meet my friend today for a joint diagnosis.

Car details: Honda Accord 2003, Euro version, car was converted to left hand.

remi4ever copy and paste your issue on the thread below

https://www.nairaland.com/996664/maintenance-tips-honda-cars

Ogbeni unfollow wa,ti oe ba lay support wa.