Author Topic: 38mpg 91 TD ...baddd mileage (Read 2776 times)

lildevil · « **on:** July 10, 2008, 07:39:20 pm »

whats the deal...newer injectors, everythings pretty much new, its a 1.6td boosting 30ish psi, would a it affect mileage that much just running a downpipe? i got 371km Highway/city from 23litres...some normal some sprited driving, something is wrong,
picture of the beasst

Quantum TD · « **Reply #1 on:** July 10, 2008, 07:56:48 pm »

Has your pump ever been rebuilt/recalibrated in the past 3 years? Chances are, it's not calibrated to the new fuel. Either that, and/or your trans is geared too low.

jtanguay · « **Reply #2 on:** July 10, 2008, 08:03:40 pm »

yea whats your highway cruising rpm's??? 30 psi fuel efficient? :shock: :lol: that sucks back quite a bit of fuel man, but still not nearly as much as a gasser guzzles :roll: :wink:

lildevil · « **Reply #3 on:** July 10, 2008, 08:43:39 pm »

mmm at about 100km its at roughly 2900rpm, how would i recalibrate the pump, should i turn the boost/fuel down?

-MLS race head gasket
-turbo boosted at around 30psi
-diesel injection pump mod
-boost pin mod

lildevil · « **Reply #4 on:** July 10, 2008, 09:29:26 pm »

like when i really step on it, black smoke just pours out, massive black clouds lol...to much fuel?

VW_Commuter · « **Reply #5 on:** July 10, 2008, 09:53:14 pm »

Just a bit, what are your EGTs when you stomp on it?

lildevil · « **Reply #6 on:** July 10, 2008, 10:26:11 pm »

about 1300f

subsonic · « **Reply #7 on:** July 11, 2008, 03:55:12 am »

Well, black smoke would be unburned fuel / MPG going out the tailpipe.
1300 is getting near the upper limit, 1500-1600 is on the edge.
If you are blowing smoke at 30PSI than I would try turning the fuel down.

CoolAirVw · « **Reply #8 on:** July 11, 2008, 07:40:30 am »

my car gets 38(normal city & hiway driving) , with a best ever of 43 (long hiway trip) and I drive light.

Imperial gallons??

lildevil · « **Reply #9 on:** July 11, 2008, 08:48:40 am »

38mpg, 230miles and 6 gallons, or 371km and 23 liters

i just have to turn the "smoke screw" counter clockwise right, how many turns, AGAIN im new, i bought the car already modd'ed
thanks fella's

VW_Commuter · « **Reply #10 on:** July 11, 2008, 09:28:07 am »

I would go 1/4 turns at a time and take it for a drive. Once you get the black smoke lessened to where you like it and performance is still good and your EGT temps are acceptable then I'd say you're good.

Greg

RabbitJockey · « **Reply #11 on:** July 11, 2008, 02:14:28 pm »

the problem is that u drive too fast. 38 mpg is pretty normal