Hi all.
I have been having this issue for some time now and would really love to get to the bottom of it.
Car: Audi A3 2.0TFSI (57)
Engine: BWA.
The problem is that every morning (mainly cold at the moment, but also when outside temperatures are nice), the car fails to catch on cranking.
After the first start of the day it is normally fine afterwards, but does sometimes do this later in the day or when I leave work it does it too.
Once started it runs absolutely fine.
When I turn the car over it turns well, so seems like starter is fine.
Battery is new within the last 3 months.
The revs raise to about 450 rpm and then drop quite low to 250rpm, but then raise again and it fires up.
Some days it's worse than others.
On rare occassions it needs a second crank.
I have recently changed the following items:
New plugs.
New coil packs.
New Air filter.
Oil & Filter Service.
New fuel filter.
New Coolant Temperature Sensor.
New Cam follower.
New battery.
Also, checked the Air Temperature Sensor with an Ohm meter and it seems that the readigns are fine when heated and when put in the freezer to cool to a low temperature.
I do have a genuine VCDS cable and it gives me no errors on auto scan.
All temperature sensors give a true reading when checked.
Fuel pressures seem good, but I'm not 100% sure on that. Would the car even start if the fuel pump relay was intermittent.?
I have carried out basic settings on Thottle Body, Intake manifold flaps and fuel pump.
I'm now totally stumped.
Can anyone suggest any ideas, or anyone experienced a similar problem.
Any advice would be greatly appreciated.
Thanks,
Rob.
I have been having this issue for some time now and would really love to get to the bottom of it.
Car: Audi A3 2.0TFSI (57)
Engine: BWA.
The problem is that every morning (mainly cold at the moment, but also when outside temperatures are nice), the car fails to catch on cranking.
After the first start of the day it is normally fine afterwards, but does sometimes do this later in the day or when I leave work it does it too.
Once started it runs absolutely fine.
When I turn the car over it turns well, so seems like starter is fine.
Battery is new within the last 3 months.
The revs raise to about 450 rpm and then drop quite low to 250rpm, but then raise again and it fires up.
Some days it's worse than others.
On rare occassions it needs a second crank.
I have recently changed the following items:
New plugs.
New coil packs.
New Air filter.
Oil & Filter Service.
New fuel filter.
New Coolant Temperature Sensor.
New Cam follower.
New battery.
Also, checked the Air Temperature Sensor with an Ohm meter and it seems that the readigns are fine when heated and when put in the freezer to cool to a low temperature.
I do have a genuine VCDS cable and it gives me no errors on auto scan.
All temperature sensors give a true reading when checked.
Fuel pressures seem good, but I'm not 100% sure on that. Would the car even start if the fuel pump relay was intermittent.?
I have carried out basic settings on Thottle Body, Intake manifold flaps and fuel pump.
I'm now totally stumped.
Can anyone suggest any ideas, or anyone experienced a similar problem.
Any advice would be greatly appreciated.
Thanks,
Rob.