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Engine Specific Info and Questions => IDI Engine => Topic started by: lildevil on July 10, 2008, 07:39:20 pm

Title: 38mpg 91 TD ...baddd mileage
Post by: 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
(http://i18.photobucket.com/albums/b116/AbsentG/234e6bb0.jpg)

Title: 38mpg 91 TD ...baddd mileage
Post by: Quantum TD 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.

Title: 38mpg 91 TD ...baddd mileage
Post by: jtanguay 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:

Title: 38mpg 91 TD ...baddd mileage
Post by: lildevil 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

Title: 38mpg 91 TD ...baddd mileage
Post by: lildevil 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?

Title: 38mpg 91 TD ...baddd mileage
Post by: VW_Commuter on July 10, 2008, 09:53:14 pm

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

Title: 38mpg 91 TD ...baddd mileage
Post by: lildevil on July 10, 2008, 10:26:11 pm

about 1300f

Title: 38mpg 91 TD ...baddd mileage
Post by: subsonic 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.

Title: 38mpg 91 TD ...baddd mileage
Post by: CoolAirVw 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??

Title: 38mpg 91 TD ...baddd mileage
Post by: lildevil 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

Title: 38mpg 91 TD ...baddd mileage
Post by: VW_Commuter 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

Title: 38mpg 91 TD ...baddd mileage
Post by: RabbitJockey on July 11, 2008, 02:14:28 pm

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