Nice catch. Can you check using OBD what vacuum negative pressure you have at idle at fully warmed up engine? I want to compare with mine, which started to be just a bit rough. So I don't know if I should go for vacuum leaks hunt or is just the engine worn out.
Rough idle; another idea...
Today I had the engine running, and hears a hissing sound from the battery area. I was trying to feel around for a rubber vacuum line, but couldn’t find one. But the sound stopped when I moved the battery insulation.
Yeah, what‽
There is (I think) a plastic evap line for the fuel system running under the filter box, next to the battery, and down to the front of the engine.
![17010]()
Where it goes next to the battery, it touches the battery. I couldn’t tell if the hole was caused by rubbing, or if battery acid ate it.
![17011]()
I am no where near a parts store. I ended up making a temporary repair by cutting the line in half, then using heat-shrink tubing to reconnect the line back together.
Without getting a whole new line, I’m not sure this repair will hold for long; I’m guessing there’s fuel vapour, definitely heat, just “marine grade” heat-shrink tubing.
But, now that it's put together, the idle has gone up from ~600 to >700, almost eliminating the rough idle. The car feels like it has more power and has a faster response time from pedal stomp to forward motion.
So maybe, if someone has an idle problem, it could be a hole in this line that needs addressing.
Yeah, what‽
There is (I think) a plastic evap line for the fuel system running under the filter box, next to the battery, and down to the front of the engine.
Where it goes next to the battery, it touches the battery. I couldn’t tell if the hole was caused by rubbing, or if battery acid ate it.
I am no where near a parts store. I ended up making a temporary repair by cutting the line in half, then using heat-shrink tubing to reconnect the line back together.
Without getting a whole new line, I’m not sure this repair will hold for long; I’m guessing there’s fuel vapour, definitely heat, just “marine grade” heat-shrink tubing.
But, now that it's put together, the idle has gone up from ~600 to >700, almost eliminating the rough idle. The car feels like it has more power and has a faster response time from pedal stomp to forward motion.
So maybe, if someone has an idle problem, it could be a hole in this line that needs addressing.
