charlieruu
Veteran Member
I see people getting like 700 miles on one tank and mine only gets 320ish. What am I doing wrong?
Yes just aboutand Your Tank is on EMPTY at 320ish?
I had a '03 Jetta automatic. I hypermile, but could not squeeze better than 36mpg highway out of it. My 1988 Honda CRX HF got 50+ on the highway. Some people do better with automatic transmissions, but I can't explain it.My wife drives the Mk4 with an auto... unfortunately she does 75% city so she gets roughly 35mpg out of it...
If I drive it gently for a week, mostly highway, I can get 38-40mpg but that's about it from the 01M tranny... best ever was 42mpg on a road trip.
at 65 mph my rpms are at about 2,100. It seems pretty normal to me.One thing to note is what RPM you're turning at a given highway speed, say 100 kph/65 mph. That alone will give an indication of how the tranny is geared.
Empty to full is around 14 gallons at the pump?I see people getting like 700 miles on one tank and mine only gets 320ish. What am I doing wrong?
Maybe so, but what are you getting when you hand calculate the MPG? Check your odo with GPS, and do a couple full tanks and hand calculate MPG. Forget about what the Scangauge is telling you. Also, don't worry about IQ so much...focus more on timing. Make sure engine base timing is correct, and then advance from there.I feel like on the flats at 60mph I should be seeing higher averages.
Maybe so, but what are you getting when you hand calculate the MPG? Check your odo with GPS, and do a couple full tanks and hand calculate MPG. Forget about what the Scangauge is telling you. Also, don't worry about IQ so much...focus more on timing. Make sure engine base timing is correct, and then advance from there.
As for the OP only getting 320 miles to a tank? Assuming that's a 14 gal fill-up, that's almost 20MPG...the diesel would have to be pouring out of the tail pipe or pouring out of the fuel tank. I'd be checking all the basics such as timing, tune-up items, anything that create drag (brakes, etc) and confirm the odo with GPS.
I don't know where it might be coming from, but it sounds like a leak in the filler neck somewhere? I have both cars vented, and can fill both of them to the cap. I even fill them and leave them overnight like this once in a while, although I try not to.I wish I could do a fill up in mine. It spews out the last 2 gallons or so from somewhere above the tank. Everything on the top including the big seal is all dry when it does this. I've been told the ventectomy would solve this but we have a Jetta that does the same and it has had that done.