TDIMeister
Phd of TDIClub Enthusiast, Moderator at Large
May I make an audacious proposal - go back to the root cause of the mileage drop??
Not sure if you are talking about the OP or me. I think my point was that I was getting 43 and change before filling up to the neck and before the mods. now with mods and filling up to the neck I get 40 average. Im sure we all know that a 600 mile tank with 15 gallons filled up to the neck is 40mpgs and a 600 mile tank with 14 gallons filled up to the point the nozzle shuts of is roughly 43. sorry to be defensive and maybe it wasn't aimed with me. I'm just gonna try a few different things to see if I can bump it up a few mpgs. hopefully a hotter thermostat will helpMay I make an audacious proposal - go back to the root cause of the mileage drop??
Cruising boost should be < 4.5 psi, max. Running excess boost costs fuel.Hey guys,
I commute 140 miles a day, ~90% highway driving. I cruise 65-70. I keep 40 psi in the tires, my torsion value is currently set at +0.5. i cruise at about 6-7psi and the turbo pumps about 15psi, @ WOT. Fuel filter has only 4k miles on it and my lift pump works properly (tested by unplugging fuel line from fuel filter.)
I'm averaging 42 mpg. Other PD owners with my driving habits are averaging low 50's, highway. I've seen almost 48mpg, cruising 80 (indicated) on a long trip in our '06 BRM.
any ideas? Anything values I should log in vagcom?
I have 2 codes being thrown, one for coolant glow plugs and 1 for the crank sensor (implausible signal). I replaced the crank sensor about 4k miles ago, with an aftermarket unit.
Yeah I was a little disturbed with my mileage after an EGR Delete, a Malone 1.5 tune and filling it up to the cap. Before EGR Delete and "real" fill ups I was pleased with the 43 to 42 mpg's I was getting. Did the EGR delete and found out about filling the neck up to the cap...ie pushing filler nozzle against vent knob instead of full ventectomy...and now routinely get 40 mpg's average.
halocline,
I'm about to try a hotter thermostat...so I will let people know what the results are. with egr delete it takes a while to get up to 190 coolant temp on the dash. followed some recommendations here and put a meat thermometer in the coolant reservoir and was surprised to barely get to 160-165 when dash read 190. even on a 90 degree day after 50 miles of hard driving it barely got to 165. so I got a hotter thermostat from an 80's GTI and plan to install it soon. hope to get better mpgs...we shall see.
A good place to look at MPG's is fuelly.com. after being disappointed with mpgs I took a look at what people were reporting on fuelly and felt a lot better. I'm sure some people get 50+ no doubt but I wonder if the fill it to the cap and if they do I'm sure they drive very conservatively (ie granny/hypermiler style). I don't doubt people get 50+ but most of us seem to get about 40 on average. hoping to bump it up a few with some mods.
If you preheat and block off the radiator I would think the effects would be less.Another one to find out the hard way that EGR delete costs you 10% fuel in winters north of MO.
Definitely. But, EGR delete is a solution in search of a problem. That's a lot of extra work redesigning a system that functions pretty well and really needs nothing besides cleaning maybe once a decade or 15 years. "Don't fix what ain't broke" is wisdomIf you preheat and block off the radiator I would think the effects would be less.
No, definitely not usual at all. Waaaaaaay high. That is an indicator that you have some parasitic load or loads applied, or potentially something wrong with your vacuum hose routing or N75 vacuum servo controller solenoid. Even AC on full blast wont do that.Noticed something weird on the way to work... At very low throttle ~15% I'm seeing a lot of boost. @70, I'm turning 12-18 psi. When I let off or get into the throttle a little more, the boost drops down.
Is this normal after an EGR delete? The car doesn't feel any different...
I don't entirely agree - lifetime, my 2000 and 2002 are within 1 mpg on my 2004's (there have now been 2). Was seeing mid 40s when in the hills north of Atlanta last weekendPD's just aren't mileage machines like the rotary pump cars. I'll take mid 40's all day long.
Your ALH cars aren't getting the greatest mileage... I was low/mid 50's with ease with my ALH. No comparison.I don't entirely agree - lifetime, my 2000 and 2002 are within 1 mpg on my 2004's (there have now been 2). Was seeing mid 40s when in the hills north of Atlanta last weekend
I was reading about driving techniques here....Un-freaking believable.
43 mpg this tank. I don't get it. I've never driven the car this hard in one tankful.
I've reconnected the EGR. I guess we'll see what happens s this tank...
You shouldn't be seeing 9psi doing 70mph on a flat road.
I'd lengthen the vnt rod a bit.. I bet if you graph requested vs actual you'll be way above what it should be. Boost during cruising will kill your mileage in a PD. It did mine.
5.8 is a bit high anyhow. Do you have luggage racks or any attachments like spoilers on the car?Bingo. Did a little logging this morning. Saw 5.8psi requested and 8.8psi actual cruising around 70 (at 35-40% load)
Okay. A/C on or off? Setting?Nope! 195 tires pumped up to 40 psi and nothing should be holding me back aerodynamically.
after this past rod adjustment, I'm cruising at about 6 (boost gauge). I'll log again tomorrow morning
Lately, a/c has been off on my 2:30am morning commute. And to be fair, she's had plenty of italian tune ups. at least 1 every 2-300 miles.Okay. A/C on or off? Setting?
Now that you have the rod length dialed in, a healthy Italian tune-up or 4 will really do wonders.