Newish poster and welcome aboard. Sounds like a good car.

My guess and only a guess is you might be taking air into the fuel system. When you slow down the presence of the air is making itself known.

The other item is one should always install new fuel filters. All too often they can produce problems. You never count on them being the issue. Yet it is the only way to make sure they are not. People on occasion have landed up like a dog chasing their tail over problematic fuel filters.

If they are not the problem. You take the removed ones and put them into secure fuel proof containers in the trunk and carry the tools to change them. They then are emergency spares.


This can save you money sometime in the future. Also carry some fuel in a small container to fill the secondary fuel filter before installing it. This can all be contained in a small box. If on a trip and you have a filter problem develop without them the costs before you are running again can be substantial today.