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diesel_john · 04-22-2008, 08:30 PM

Does the TDI recirculate fuel back to the tank like my rabbit does.
Does the Scanguage use pulse width to calculate fuel flow. Injector lift sensor is that in #3 injector the one that cost $300. Look at that wave form on a scope and the VSS.
The fuel delivery pressue would need to be correct (filter restriction) tank vent, collapsing line. Are any fuel lines kinked or soft.
Did you buy it new or used (could the injectors have been changed.
Does it otherwise run good ( start good in the winter, good mpg).
This is a very interesting issue. I would like to learn more about it.
If the car is running good with no codes then I would lean more to OBD interface related. Is the computer stock? Is there anything fuel related that has been worked on?
If the engine is starved for fuel then the ECU will increase pulse width to compensate.

oh, hearing about more than one with the same issues, now.
Is it possible to record all the parameters off the scan for both scenarios and then compare and look for unreasonable inputs.

04-22-2008, 08:30 PM	#5 (permalink)
diesel_john MP$ Join Date: Jan 2008 Location: SW Ohio Posts: 595 Thanks: 5 Thanked 19 Times in 14 Posts	Does the TDI recirculate fuel back to the tank like my rabbit does. Does the Scanguage use pulse width to calculate fuel flow. Injector lift sensor is that in #3 injector the one that cost $300. Look at that wave form on a scope and the VSS. The fuel delivery pressue would need to be correct (filter restriction) tank vent, collapsing line. Are any fuel lines kinked or soft. Did you buy it new or used (could the injectors have been changed. Does it otherwise run good ( start good in the winter, good mpg). This is a very interesting issue. I would like to learn more about it. If the car is running good with no codes then I would lean more to OBD interface related. Is the computer stock? Is there anything fuel related that has been worked on? If the engine is starved for fuel then the ECU will increase pulse width to compensate. oh, hearing about more than one with the same issues, now. Is it possible to record all the parameters off the scan for both scenarios and then compare and look for unreasonable inputs. Last edited by diesel_john; 04-22-2008 at 08:49 PM..