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Is anyone able to send me a video running through the measuring blocks at idle as I want to see if anything stands out as wrong on my data Car is running rough with low power, slightly increased oil temp and and increased whine sound but no engine management light or any codes when scanned Just want...

So still struggling to get to the bottom of my car idling badly and having very little power One thing that has been consistent during this problem is the louder than normal whine you get from these engines After removing the bottom cover this sound is coming from the back of the sump in the middle ...

Help needed!!! Haven’t really had much time to look at the car but had this problem for some time now and want to get to the bottom of it Car lacks any power at all, terrible to drive, exhaust note is much quieter than normal, tailpipes are black so seems to be running rich If the throttle is blippe...

Did you get to the bottom of this in the end?

Yes high pressure and low pressure seem ok although the hp reading does seem to move up and down more than I remember from when the car was running good but the problem is there from the minute the car is started so even present at idle when the hp actual reading is near bang on what the specified r...

Fuel trims seem to have returned to just slightly negative on both banks now but car still runs rough and lacks any power, have noticed a fair petrol smell when removing oil filler cap so maybe a hpfp is leaking into the valve cover! If the throttle is blipped in neutral the revs seem to hang quite ...

The RS4 has two fuel pumps, and that sounds similar to what happened when one of mine failed. The dips in power seemed to happen at the same point in the rev range, and changing one did the trick - the other is still going strong. There was no warning light. The only thing that confuses me is the f...

RichT128 wrote: ↑

Sat Mar 13, 2021 12:54 am

Check the lambda sensors. Sounds a little like the edge of it tripping into limp mode (not sure from the post how great the loss of acceleration is)

Sent from my SM-G973F using Tapatalk

What is the best way to check lambda sensors? I have VCDS

Check the lambda sensors. Sounds a little like the edge of it tripping into limp mode (not sure from the post how great the loss of acceleration is) Sent from my SM-G973F using Tapatalk Power loss is pretty substantial, only other thing to note was just before I noticed any real power loss and real...

Sounds slightly, similar to what was happening when my high pressure fuel pumps were failing. Though I've not gotten the new ones yet so not sure if it'll be fixed.... Sent from my SM-G991U using Tapatalk I logged some data with VCDS the other night with fuel pressure etc both low and high pressure...

Evening All, Car has started to run rough, cold start is extremely rough and the revs move up and down a little during the process, once cold start is finished it settles a little but still stumbles and is not smooth Car lacks any power at all Whilst trying to log a 3rd gear pull and capture some da...

mikep99 wrote: ↑

Tue Dec 15, 2020 11:24 pm

Good work!!

Do you have the part number of the crankshaft position sensor?

ta
Mike

Just looked on the invoice but the part number is not on there so afraid not

Quick update for anyone that gave some input or suffers similar problems Basically the original problem was very jerky at low speed / small throttle angles, car seemed a little down on power sometimes but fine others The last drive home from work just as i was nearing home it started to run rougher ...

Ok so quick update Original problem was slight surging at low throttle / rpm so was initially investigating that, took the air filter out and it was full of dust / debris Its a BMC aftermarket filter, at the same time i took the MAF out to clean with some MAF spray, filter was cleaned with the prope...

Definately change the injectors. Did you log Low pressure fuel and High pressure in the pulls? For reference I see a peak of 162grs maf read at ~7800, give it a clean first to see, I assume the air filter is new or at least recently cleaned? The lowest I get at WOT with lpfp is 3.8 and hpfp specifi...