I had bought a 2013 VW Golf with the 2.5 5 cylinder and 5 speed manual recently and one thing I noticed about it is that under most circumstances, the fuel does not cut off when you take your foot off the gas. In fact, even when braking it doesn't cutoff. I can see this when I set the MFI display to instantaneous mileage and I still see a MPG reading and not --.--
I own a ScanGuage II and I plugged it in and I saw that the throttle would mostly close, but the engine was still receiving fuel and the spark plugs were firing.
There are some circumstances where it does cut off, but only when;
I'm over 3500 rpm in any gear,
I'm in 5th gear over 1500 rpm (over 50 mph).
If I'm in 1st it seems to only cut off over 2500 rpm.
In 2nd it will cut off but only after a few seconds over 2k rpm.
3rd seems to take about 10 seconds for it to cut off, and only above 1500 rpm.
If the engine is cold, it seems to cut off at a lower rpm, and in a shorter amount of time as well.
It just seems annoying to me because it makes low speed driving somewhat of a chore as I have to shift to neutral any time I want to slow down, or I just have press harder on the brake pedal, which to me is a waste of brakes and waste of gas to brake while the engine is firing. I came from a 97 Civic HX 5 speed before this car and I guess I'm just used to the car engine braking immediately when I'm slowing down.
I had a dealer look at it and they say the car does this by design. They seemed puzzled by my description of my issue, so I'm not sure if they knew what they were doing or not. They claimed that the engine has to fire in order to generate vacuum for the brake booster and so that the electric power steering has power to operate as well.
But the engine doesn't lose vacuum just because it's not receiving fuel, the engine is still spinning with a near closed throttle, which should generate plenty of vacuum. A bicycle air pump generates vacuum from pushing up and down on its handle without combustion. The alternator should also be spinning and generating electricity as well.
It may be to the point that I'll have to get a different car if this is truly part of its design to do that, but now I'm wondering if all new manual cars do that now (got nothing against autos I just prefer manual is all).
Hopefully what I typed here makes sense, thanks to anyone who took the time to read!
I own a ScanGuage II and I plugged it in and I saw that the throttle would mostly close, but the engine was still receiving fuel and the spark plugs were firing.
There are some circumstances where it does cut off, but only when;
I'm over 3500 rpm in any gear,
I'm in 5th gear over 1500 rpm (over 50 mph).
If I'm in 1st it seems to only cut off over 2500 rpm.
In 2nd it will cut off but only after a few seconds over 2k rpm.
3rd seems to take about 10 seconds for it to cut off, and only above 1500 rpm.
If the engine is cold, it seems to cut off at a lower rpm, and in a shorter amount of time as well.
It just seems annoying to me because it makes low speed driving somewhat of a chore as I have to shift to neutral any time I want to slow down, or I just have press harder on the brake pedal, which to me is a waste of brakes and waste of gas to brake while the engine is firing. I came from a 97 Civic HX 5 speed before this car and I guess I'm just used to the car engine braking immediately when I'm slowing down.
I had a dealer look at it and they say the car does this by design. They seemed puzzled by my description of my issue, so I'm not sure if they knew what they were doing or not. They claimed that the engine has to fire in order to generate vacuum for the brake booster and so that the electric power steering has power to operate as well.
But the engine doesn't lose vacuum just because it's not receiving fuel, the engine is still spinning with a near closed throttle, which should generate plenty of vacuum. A bicycle air pump generates vacuum from pushing up and down on its handle without combustion. The alternator should also be spinning and generating electricity as well.
It may be to the point that I'll have to get a different car if this is truly part of its design to do that, but now I'm wondering if all new manual cars do that now (got nothing against autos I just prefer manual is all).
Hopefully what I typed here makes sense, thanks to anyone who took the time to read!