StreetForged
Member
- Joined
- May 24, 2018
Just finished a grueling solo F+T swap last night with an OE 940 Garrett setup and threw an AEM wideband on it to be safe, and I'm seeing pretty concerning AFRs from idle and cruising/light accel.
Last night it idled around 14.5-15 until it started to warm up, then began to run around 16 with a lot of spikes up to 18-19. I had to drive it home which was about 5 mins, in which case it ran around 14-15 most of the ride home. I gave it another test drive today and when I took it up my road it was staying between 15-18 the whole drive, so I turned around half a mile up and came back. Haven't gone even close to WOT yet since idle and light throttle AFRs have been so sketchy.
My O2 sensor is only a few inches away from the turbo since I had to shave a bit off the downpipe to fit a 240 so I'm not sure if that's causing any issues. Open downpipe currently until I find the motivation to fabricate another exhaust.
I have 850t injectors, a fresh pcv setup into a catch can, and a janky intake setup, but everything else is OE turbo parts for a 1995 940se. Turbo seems to be leaking oil which wasn't disclosed in sale to me, as the intercooler and hoses had a decent oil film and I'm seeing fresh oil on the intake side of the housing that isnt coming from the feed or drain.
I just put in new NGK copper plugs which I gapped somewhere around .29-.30, all my ignition stuff is new, 3 bar FPR, shouldn't be any vacuum leaks, fairly new fuel filter and sock, have tried a few MAFs..
I've been waiting 2 months on my manifold gaskets, so I'm thinking this could probably play a big role. Is there anything else to consider? This is my daily and it's been out of commission for a week. Save the judgement, I am aware this probably wasn't smart but it was necessary.
Last night it idled around 14.5-15 until it started to warm up, then began to run around 16 with a lot of spikes up to 18-19. I had to drive it home which was about 5 mins, in which case it ran around 14-15 most of the ride home. I gave it another test drive today and when I took it up my road it was staying between 15-18 the whole drive, so I turned around half a mile up and came back. Haven't gone even close to WOT yet since idle and light throttle AFRs have been so sketchy.
My O2 sensor is only a few inches away from the turbo since I had to shave a bit off the downpipe to fit a 240 so I'm not sure if that's causing any issues. Open downpipe currently until I find the motivation to fabricate another exhaust.
I have 850t injectors, a fresh pcv setup into a catch can, and a janky intake setup, but everything else is OE turbo parts for a 1995 940se. Turbo seems to be leaking oil which wasn't disclosed in sale to me, as the intercooler and hoses had a decent oil film and I'm seeing fresh oil on the intake side of the housing that isnt coming from the feed or drain.
I just put in new NGK copper plugs which I gapped somewhere around .29-.30, all my ignition stuff is new, 3 bar FPR, shouldn't be any vacuum leaks, fairly new fuel filter and sock, have tried a few MAFs..
I've been waiting 2 months on my manifold gaskets, so I'm thinking this could probably play a big role. Is there anything else to consider? This is my daily and it's been out of commission for a week. Save the judgement, I am aware this probably wasn't smart but it was necessary.