Real quick questions.

Does someone know: When driving in D and letting off the throttle (coasting) do the fuel injectors cut out or have a lean-burn mode, or is it business as usual while coasting?

Second: Technically, what parts get affected if you shift N-D from a coast (no throttle input)? Is it worse as speed increases?

Third: The trans, does it wear while traveling engine-off in Neutral (such as being towed behind an RV) short distances?

If it helps the car is a 2001 S60, B5244S, 2.4L, AW55-50, 5speed auto.

 

Real quick answers.

1) Some cars do seem to cut off fuel supply at throttle-off, not sure if it applies to your car.

2) As far as I know, no parts would be affected by shifting between N-D. However, if you keep the shifter in N while the car is moving, the fluid circulation stops and eventually the gearbox rests in peace. But it takes a while/abuse until this happens but leaving the shifter in N while the car is in motion, such as going downhill, should definitely be avoided.

3) Short distance/low speed wouldn't affect the gearbox but it is preferred to position the front (drive) wheels off the ground when towing.

I hope I've answered your questions. Wait till others reply with different perspective as well.


JPN

 

Thanks JPN for your thoughts. The first two questions I already had a hunch on, but it was the third question that I was clueless about. That's because I read the owners' manual... it's full of contradictive statements.

Taken directly out of the manual from volvocars.us:

Quote:

Precautions when the car is in tow[*]The steering wheel must be unlocked. Turn the ignition key to position I or II.[*]The gear selector must be in position N.[*]Maximum speed: 50 mph (80 km/ h). Do not exceed the maximum allowable towing speed.[*]Maximum distance with front wheels on ground: 50 miles (80 km).[*]While the car is being towed, try to keep the tow rope taut at all times.[*]The cars should only be towed in forward direction.

Then on the very next page:

Quote:

Towing cars with front wheel drive
Volvo recommends the use of flat bed equipment.

To me, that's like giving directions to your house to your friend and then telling him you don't want him to come over, ever!

 

>To me, that's like giving directions to your house to your friend and then telling him you don't want him to come over, ever!

How rude......

It is probably a euphemism of saying "You can tow your Volvo if you like, but we can't be held liable for any damage caused by towing, including mechanical damage, equipment damage and psychological damage, so we recommend using flat-bed equipment but still don't want to get sued[8D]. "

Other than that, all I can think of is that there were 2 people who wrote the manual, and the 2nd person was trying to back-stab his/her colleague by ruining the towing instructions.....politics[8D].

As long as the car is FWD, you can tow your car for a short distance at low speed (a fewmiles, at 30mph or slower) with the front wheels off the ground.


JPN