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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old February 17th, 2019, 06:46   #31
mrfiat
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Join Date: Mar 2008
Location: Los Ranchos, NM
Fuel Economy: 38.5 mpg (in town - trying to improve it)
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I'm doing a 160 miles highway trip today I will let you know what FE I get. I haven't adjusted the IQ back down yet. Injector balance: .49, .24, -.45, -.33 (just about perfect IMO)
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Old February 17th, 2019, 12:04   #32
mrfiat
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Join Date: Mar 2008
Location: Los Ranchos, NM
Fuel Economy: 38.5 mpg (in town - trying to improve it)
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46.2 mpg on the road trip today. Not too bad.
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Old February 18th, 2019, 14:49   #33
Rob Mayercik
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Join Date: Dec 2001
Location: NJ, U.S.A.
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Interesting, that's much more in-family, even though the city MPG seems still very low.

Any chance your thermostat could be stuck open, prolonging the engine's rise to operating temperature? You'd see more impact from that on short trips than that long one.
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Old February 18th, 2019, 19:05   #34
mrfiat
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Join Date: Mar 2008
Location: Los Ranchos, NM
Fuel Economy: 38.5 mpg (in town - trying to improve it)
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Thanks, but I don't think so. It is 20-30 degrees here in the morning when I start driving and I have heat within a few miles of driving.
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Old February 18th, 2019, 20:38   #35
Rrusse11
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Join Date: Jan 2014
Location: PA Deutsch Country
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Well I just got an FE report, 307 miles at 35mpg, lots of short trips and a couple of hard country road runs.
I've been pushing it to test my boost limitation adjustment on the actuator.

Frankly I feel the injectors are a tad big, IQ at 8.8, good balance in block 13, starts well hot or cold with no throttle input.
With ARP headstuds to be installed, I could easily make more power, and lose a bit of FE, but hey, this car's FUN to drive.

Should have some TT quattro rear brakes, 256x22 vented rotors soon.
Waiting on some new rotors, picked up a pair of calipers over the
weekend. One needs some new seals, fingers crossed all the parts
go together.


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