Chat Purchased a 1.6 FSI

PlasticMac said:
If you run the same log as before, (142), but start logging with ignition on, but before starting the engine, you'll be able to capture the full arc of flap movement.
This is because, when you turn the key to first position, the flap actuator vacuum vents, to ensure the flaps are down, (inlet fully open). Wait a few seconds, then start the engine. As soon as the engine is running, vacuum is applied to the actuator, and the flaps move to the up, (stratified), position, which is what your log, (post 74), shows.
If you log Group 141 & 142, starting with ignition on, engine off, you'll check the flaps and electric fuel pump at the same time.
Mac.
Click to expand...

Hi @PlasticMac.
I eventually managed to take the car for a run and take some more traces which I have e-mailed. I assume it is "normal" for the flap readings to be either 0% or 100% but rarely anything in between? I also couldn't distinguish the tank fuel pump pressure. Did I capture the wrong measuring block?

TIA

Andy
 
AndyBa said:
Hi @PlasticMac.
I eventually managed to take the car for a run and take some more traces which I have e-mailed. I assume it is "normal" for the flap readings to be either 0% or 100% but rarely anything in between? I also couldn't distinguish the tank fuel pump pressure. Did I capture the wrong measuring block?

TIA

Andy
Click to expand...
Andy
I will look at the data later, but it is normal for the flaps to be either up, (100%, stratified), or down, (0%, inlet fully open), they are "binary" so that is a good result. Sorry not to have replied, a bit under the weather right now.
Mac
 
Hi Andy, I've looked at the graphs, and they look OK. The inlet flaps are functioning perfectly.
You have logged Group 141, to check fuel pressure, but it should have been Group 140. This might be my fault, as I may have made the same mistake in one of my posts.
You have though, identified a problem with the vcds lbl file, as the data in Group 141, is not as described in the lbl file.
I asked @Andrew, to make sure it wasn't just me, and he confirmed there is a problem.
We'll try and sort Group 141 lbl file, meanwhile, could you log Groups 140 & 141, when you get a chance please? Group 140 will confirm your fuel pressures, while comparing 140 with 141 will help figure out what 141, data means. It relates to the fuel pressure regulator function, a variable bypass valve that actually controls the fuel pressure, so that it matches the pressure specified by the ECU.
So far, all looks to be OK with your FSI.
Mac.
 
Last edited:
PlasticMac said:
Hi Andy, I've looked at the graphs, and they look OK. The inlet flaps are functioning perfectly.
You have logged Group 141, to check fuel pressure, but it should have been Group 140. This might be my fault, as I may have made the same mistake in one of my posts.
You have though, identified a problem with the vcds lbl file, as the data in Group 141, is not as described in the lbl file.
I asked @Andrew, to make sure it wasn't just me, and he confirmed there is a problem.
We'll try and sort Group 141 lbl file, meanwhile, could you log Groups 140 & 141, when you get a chance please? Group 140 will confirm your fuel pressures, while comparing 140 with 141 will help figure out what 141, data means. It relates to the fuel pressure regulator function, a variable bypass valve that actually controls the fuel pressure, so that it matches the pressure specified by the ECU.
So far, all looks to be OK with your FSI.
Mac.
Click to expand...

Many thanks @PlasticMac appreciate your prompt response. I'll take another trace when I get the opportunity.
More importantly I hope you are OK.
 
AndyBa said:
Many thanks @PlasticMac appreciate your prompt response. I'll take another trace when I get the opportunity.
More importantly I hope you are OK.
Click to expand...
Yes thanks, a couple of dodgy days but OK now.
I hope we can see some correlation between 140 & 141, to give us a clue to what the four measuring blocks in group 141 represent.
Ross-Tech say the Audi documentation from way back then is not clear. Their best, (informed), guess is:

141/1 = High Pressure System Adaptation
141/2 = High Pressure Controller (Steady? ) Portion (my guess)
141/3 = High Pressure Non-Steady Portion
141/4 = High Pressure System Status

I think group 141 would be useful, if we can figure it out.
Mac.
 
Last edited:
AndyBa said:
So today I did a little investigation
Removed on of the plugs which were replaced June 22. NGK ZFR 6S quads as per ECP. Confirmed 2x "new" Bosch coilpacks in cylinders 2 & 3. Gen VW/AUDI coilpacks in 1 & 3 possibly originals.
Spark plug very black so assume running rich? Isn't FSI meant to be lean-burn?
Noted the coilpack wiring wrap is a bit "ragged". Also it is earthed behind CP1. I cleaned that up. It started slightly better. Not sure if that was my imagination tho, it certainly wasn't perfect!

View attachment 114596

View attachment 114597
View attachment 114598
View attachment 114599
Click to expand...
Hi Andy,
Yes, change your spark plugs as they are well worn down and just so as you know that genuine Audi plugs are Bosch.
Regarding the earth point behind # 1 coil pack in your picture, remove the bolt and clean it as well as both sides of the round terminal and the point of connection on the head where the bolt screws down and just give the wire a bit of a tug too as it broke on my 1.6FSI engine just to be sure. Also remove and clean the earth point below the N/S headlight (needs removed first).
 
You must log in or register to reply here.
Back
Top