stancez

2.5 years you mean to reply to a thread no one was able to help with, which is why I took it in to a workshop.

Hey mate, I ended up taking it in to have it professionally looked over, they took two days to figure out the issue was, it wanst making any power 200rwkw so the tuner took off the back half and she picked up 111rwkw, ultimately was a blocked muffler. I had a few other things done and got the car back with 320rwkw.

Hey all, I finally bit the bullet and took it in to find out what the issue was, it turned out the old standard back half of the muffler was blocked, tuner took it off and went from 200rwkw to 310wrkw. Ended up throwing on a few upgrades and picked it up with 320rwkw on 15psi.

Hey mate yeah I still have the issue have the issue the last thing I did was replace the the fuel pressure regulator and it still does it. I work FiFio so the car is parked up majority of the time these days. Think I'm going to have to bite the bullet and take it to a shop to have them diagnose the issue.

Did another log to work still in open loop decided to check fault codes again, now I have a pcm fault. Reset the pcm car went back to closed loop for about 1min and then went back to open loop again, fault code hasn't shown up yet. https://www.instagram.com/p/CTPsdDqBzCw/?utm_source=ig_web_copy_link

Yeah checked, for codes nothing significant, and have also checked the CHT and it's nominal at 90c. The open loop occurred only after changing to this new O2 sensor. The LTFT are adjusting and after a while, cruising at about 80kph it'll sit. Notice in the last pic the STFT had improved significant also. However the voltage on the 02 sensor still is showing to high voltage when the car is coasting or at idle which is when fuel trims go out the window and the car starts using more fuel again. Hopefully the FPR will get here by the weekend and I'll install it to see how it goes.

Did another log on the way home from work, https://www.instagram.com/p/CTO1Wqah5S1/?utm_source=ig_web_copy_link Drove alot better than it has for a while fuel trip still continues to come down, its only when on idle it's having the issue. I heard that the factory fuel rail can rust over years internally and gunk up the fpr, hopefully it'll be that or the return will see this week. Only thing I noticed is the whole time it stayed in the open loop which I'd think is odd as open loop is the ecu not taking reading from the 02 correct?.

No I mean stock as in base boost etc accounting for the injectors. Just grabbed a FPR will swap it out in the coming days. Did a log on the way to work, the 02 was hunting all over the place unless I take my foot off throttle and then it sit about .078 Long fuel trims hunted for a while and then sat at 0%. And the short trims were all over the place and then would sit at -18.79% and go up when more throttle was applied. Here's a screen shot of the log from Forscan last night. https://www.instagram.com/p/CTNSJhvhbTF/?utm_source=ig_web_button_share_sheet

Update installed the new o2 sensor. Now it seems to be running better around town went for a drive and got the fuel trip down from 19 to 16. Where it still seems to run rich and cause issue, is idling.

From my understanding long-term is what the car has learnt over time?. Can you explain why and also what value I should be looking for on a stock tune?. Put it this way the cars fuel trip on the dash over time has gone from about 13.1 to as high as 25L per 100. managed to get it down to 19 by driving it like a nanna.

Custom dyno tune. Intercooler and injectors. No wideband installed, rich as in using not pulling fuel out. Just went for a drive and monitored the 02v and it's stays at .90v and only when blipping the throttle it'll dip down and then return back to .88-90v should be around .45v stoich correct?

Yeah I got it tuned I have 3 different settings but since the issue, reverted it back to stock map.

Hi all, I've had an issue with my car running rich now for month's, I've replaced alot of parts trying to figure out what the cause is with no success. A while back my car started to run super rough and rich, figured it was a vacuum leak somewhere or coils. Turned out it was the lower plenum gasket, replaced and it fixed the idle issue but not the over rich condition. Since I've done the following trying to figure out what the cause is: Purchased new oem coils/plugs Replaced TB gasket, PCV valve, Plenum gasket, New battery, Venum high flow cat/Y piece, New fuel filter, New O2 sensor, New Bosche Map sensor. New O-rings/micron filter on injectors. Just picked up the FORscan tool and the O2 shows as 0.9v on idle, when I rev the car to redline in park it'll head back to a more Stoich reading and idle more smooth for about 5secs before going back to 0.85-.90v I've ordered another VOD 02 sensor in the hopes the previous bosche one was d.o.a but I'm at a loss as to what the issue is?. Thermo? CHT sensor?. There's a other guy on here who had the exact same issue but it seems there's was no conclusion, any help would be greatly appreciated t.I.a.

Any update to this, I've got a MKII 04 XR6T and have been dealing with the same issue, and similarly replaced alot of the same parts with no success. Just purchased Forscan OBD and from what I could see no significant faults that would cause this issue. Just purchased another o2 sensor in the hopes that the previous one I installed might have been d.o.a any help would be great! T.I.a.