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Discussion Starter #1
I'm trying dsla 150p 764 injectors this week in my 2002 Jetta TDI and have notice so far a few miles per gallon reduced. Yes I'm trying to drive with th foot of the gas.

I was alway getting 700 miles tanks now somewhere around 600 miles.

I had to increase my IQ to 5.8 but yesterday I brought it back down to 5.2. Car is runnig smooth

I also just installed a VNT17 turbo prior to the injector upgrade.

Depending on the IQ stting does it also also effect mileage. My isn't tuned yet thats my next upgrade.

When I purchased my ne injectors it came with two sets of nozzles 764 and 1019

I did not install the new injector bobies with the test I'm running now.

car has 182k on it.

Repair durning the last month

Oil change with filter 505.01
Fuel Filter
Intake Cleaning
Maf replace (limp mode)
EGR do to bad oil leak (limp mode)
VNT17 turbo upgrade
new air filter
snow screen clean
all vacuum lines changed


also
Suspension upgrade
All Audi TT bushing and tie-rods
Bilstein BTS tuned System with coil
New SEAT Rear Bushing
Upgraded clutch and flywheel

Thats it I think
 

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Could it be related to winter fuel or fuel quality from a different fuel station?

If the car is running smoothly I would leave it there until you get chip tuning. IQ should slightly affect mpg. 700 miles is better than average. And of course, the more mods you put on the more power you will use and the lower the mpg.
 

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Check the injector balance in group 13.. see how even they are.

how is the physical timing? (flywheel at TDC, cam lock in and pump pin in) what does teh graph on VCDS show in basic settings?

if you do not have VCDS, find someone who does and see fithey can help you.
 

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are the poppet pressures on the 150's the same as stock,200/300 bar our do they change it up at all. I,m new to the tdi but been doing diesel performance for about 10 years, the tdi tech. is very impressive.
 

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Discussion Starter #5
I do have a Ross Tech that is the way I adjusted my IQ.

Timing has been checked and it is slightly advance

Balance of injectors are -.38, .07, .05, .28
 
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