Upsolute + N146 intermittant
My car is a 1998 A4 TDi with the AFN engine. Since having the car chipped (maybe coincidence) by upsolute last year, slight throttle in fifth gear at 40-50 mph gives a slight judder. more recently my glowplug light is flashing and the car judders more.
The car has had a new fuel filter and has been throught more than one tank of fuel on the problem. No biofuel has been used in this car.
Timing is spot on.
Vagcom gives a N146 intermittant error which wont clear.
This refers to the quantity adjuster in the vp37 fuel pump. Using audi's diagnostics I have verified the resistances across the adjuster are correct and the signal coming from the ecu is correct and the 8 pin connecter to ecu connector is connected and not shorted to anything.
Does anybody have the answer to this. Some forums would suggest that it is the "Chip" that is causing this.
Does anybody have the circuit diagram for the ecu in this car so I can verify the return signal from the quantity adjuster is getting to where it needs to go?
I have emailed Upsolute and await a reply but thought I would ask those who know as well!
The car is standerd other than a drop in K+N panel filter.
Definitive fuel quantity at idle
I checked the fuel quantity after the drive to work
The readings are
injection quantity = 3.8/4.0 mg per stroke
voltage = 1.620v
temp = 80.1c
These look ok to me (assuming temp is the coolent temp!)
I have just ordered the special tool to take the top of the pump off.
Think I will also get some PLCC sockets and ask Upsolute for my original chips back for diag purposes.