Taking car for a "blast" down motorway/dual carriageway.
Discussion
Otherwise known as an Italian tune up. Getting the engine really going revving through the gears after warming the car up. It's suppose to clear a lot of s
t out of your engine, does it work? I don't know, but my cars always feel smoother after a good run.
In a diesel car it's said getting it up to speed on the motorway and maintaining for 20 minutes or so will set your dpf filter to regenerate and burn off all the soot.
t out of your engine, does it work? I don't know, but my cars always feel smoother after a good run.In a diesel car it's said getting it up to speed on the motorway and maintaining for 20 minutes or so will set your dpf filter to regenerate and burn off all the soot.
Direct Injection cars don't tend to have much fuel in the inlet tract on the basis they inject fuel direct into the cylinder.
They do however re-circulate their oily breather gases through the inlet tract like most cars.
The lack of fuel in the inlet tract means the oily ming builds up in the ports and on the back of the inlet valves.
Some scavenging of fuel out of the cylinder into the inlet tract probably happens when you give it full blast. Sooo.. you could technically suggest that giving them a blast does clean up their performance as you help clean up the ports.
Some Audis definitely do suffer from this clogging up inlet issue.
RW
They do however re-circulate their oily breather gases through the inlet tract like most cars.
The lack of fuel in the inlet tract means the oily ming builds up in the ports and on the back of the inlet valves.
Some scavenging of fuel out of the cylinder into the inlet tract probably happens when you give it full blast. Sooo.. you could technically suggest that giving them a blast does clean up their performance as you help clean up the ports.
Some Audis definitely do suffer from this clogging up inlet issue.
RW
Steven_RW said:
Direct Injection cars don't tend to have much fuel in the inlet tract on the basis they inject fuel direct into the cylinder.
They do however re-circulate their oily breather gases through the inlet tract like most cars.
The lack of fuel in the inlet tract means the oily ming builds up in the ports and on the back of the inlet valves.
Some scavenging of fuel out of the cylinder into the inlet tract probably happens when you give it full blast. Sooo.. you could technically suggest that giving them a blast does clean up their performance as you help clean up the ports.
Some Audis definitely do suffer from this clogging up inlet issue.
RW
I can't remember where I read it, but there was talk of running a DI engine at 3000rpm for 20 minutes. Something to do with getting the intake valve temperature up to 380 deg C, which was found to 'burn off' the carbon. So yeah, 'Italian tune up' then!They do however re-circulate their oily breather gases through the inlet tract like most cars.
The lack of fuel in the inlet tract means the oily ming builds up in the ports and on the back of the inlet valves.
Some scavenging of fuel out of the cylinder into the inlet tract probably happens when you give it full blast. Sooo.. you could technically suggest that giving them a blast does clean up their performance as you help clean up the ports.
Some Audis definitely do suffer from this clogging up inlet issue.
RW
Thing is though, how the hell do you keep an engine above 3000rpm for 20 minutes these days, in this country? Impossible. I tried it once and even dropping down to 4th gear, I couldn't maintain it because of people driving like slugs.
SuperchargedVR6 said:
I can't remember where I read it, but there was talk of running a DI engine at 3000rpm for 20 minutes. Something to do with getting the intake valve temperature up to 380 deg C, which was found to 'burn off' the carbon. So yeah, 'Italian tune up' then!
Thing is though, how the hell do you keep an engine above 3000rpm for 20 minutes these days, in this country? Impossible. I tried it once and even dropping down to 4th gear, I couldn't maintain it because of people driving like slugs.
It's easy on my daily driver / shed. 70mph is 3500 rpm Thing is though, how the hell do you keep an engine above 3000rpm for 20 minutes these days, in this country? Impossible. I tried it once and even dropping down to 4th gear, I couldn't maintain it because of people driving like slugs.
Coincidentally, it's maximum torque is at those revs too.
danllama said:
I drove home from Aylesbury to Romford.
My condolences...Sorry- that did make me think, about a decade ago early New Years Day I drove from Aylesbury to nr Romford in the early hours. Full Warp drive engaged, car was purring sweet as she'd ever been, traffic was moving out of my way, I was so chuffed.
Then the oil light came on in lane 3 at the M25/M11 junction, I made it to lane 1 by the time the engine died, when I rolled to halt in the hard shoulder there was an actual loud belching sounds and large what I can only call blobs of engine/oil/gearbox parts where vomiting onto the tarmac all stuck together and steaming. It was like an Alien had bled into the torque converter.
My point- well its tenuous, but by all means take your car for a long blast but beware that an hour+ at Warp 10+ in a road car might be outside what the coolant and lubrication systems can handle despite whatever credentials you believe the car has :-)
scubadude said:
blobs of engine/oil/gearbox parts where vomiting onto the tarmac all stuck together and steaming. It was like an Alien had bled into the torque converter.
Can't think of a car with shared automatic gearbox and engine oil so must have been an epic failure of engine or gearbox punching holes in the casing of the other. Impressive.Jimmy Recard said:
trickywoo said:
Can't think of a car with shared automatic gearbox and engine oil so must have been an epic failure of engine or gearbox punching holes in the casing of the other. Impressive.
MiniIt'd be a good quiz question?
Jimmy Recard said:
trickywoo said:
Can't think of a car with shared automatic gearbox and engine oil so must have been an epic failure of engine or gearbox punching holes in the casing of the other. Impressive.
MiniDad had Minis and Maxis over the years. 1st 4 speed auto I can remember. All other cars made do with three.
scubadude said:
danllama said:
I drove home from Aylesbury to Romford.
My condolences...Sorry- that did make me think, about a decade ago early New Years Day I drove from Aylesbury to nr Romford in the early hours. Full Warp drive engaged, car was purring sweet as she'd ever been, traffic was moving out of my way, I was so chuffed.
Then the oil light came on in lane 3 at the M25/M11 junction, I made it to lane 1 by the time the engine died, when I rolled to halt in the hard shoulder there was an actual loud belching sounds and large what I can only call blobs of engine/oil/gearbox parts where vomiting onto the tarmac all stuck together and steaming. It was like an Alien had bled into the torque converter.
My point- well its tenuous, but by all means take your car for a long blast but beware that an hour+ at Warp 10+ in a road car might be outside what the coolant and lubrication systems can handle despite whatever credentials you believe the car has :-)
Surely a well maintained car will purr along on a clear motorway all day long, with no external forces coming into play? I've never been left on the side of the road by one of my mr2's, bar a tyre blowing out which was caused by debris left in the tyre by the fitter. Sorry to hear about your misfortune though, I guess random mechanical failure could happen to anyone at any time.Sorted an EGR valve error on our X-Trail doing this a couple of years ago. Kept getting an EML with the code something to do with EGR valve sticking open. I would clear the code, then it would return a few weeks later. Tried spraying a can of EGR cleaning stuff into the inlet manifold, that didn't sort it.
One evening it came on while I was driving on the motorway, I got annoyed. Ensured the engine was warm, dropped a gear and floored the throttle. Big cloud of black smoke out of the exhaust. Repeated the same a few more times but in a higher gear with the throttle wide open, each time a bit less smoke. After the engine was stopped and restarted, the EML was gone and it never came back. That was about 2 years ago
One evening it came on while I was driving on the motorway, I got annoyed. Ensured the engine was warm, dropped a gear and floored the throttle. Big cloud of black smoke out of the exhaust. Repeated the same a few more times but in a higher gear with the throttle wide open, each time a bit less smoke. After the engine was stopped and restarted, the EML was gone and it never came back. That was about 2 years ago
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