God knows with Dean it's all top secret
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With the long term trim fault, air/vac leak looks most likely, but did see mention of faulty/on its way out oxygen sensor could contribute to this code without throwing its own code, might be worth swapping out if you have a spare to see if that clears the issue. Failing that as you mentioned, smoke testing I'd do next as I'd not think that your maf is at fault.
Sounds like we need another Shrewsbury meet.......
id be up for a Shrewsbury meet ill be in a merc now though, I'll park well out the way
MAF & ETM are brand spanking new from FRF. I replaced a check valve in the EVAP line and did 90 miles yesterday and it seemed much happier. There were some flutters at the same point 2800 under mild acceleration/ partial throttle, but they seemed to dissolve as the miles rolled by, so it could be MAF scaling or bad partial mapping? There were no lights until I got a bit carried away, on the way and pushed her up to 1 bar. Again she complained of long term fuel trim upper limit. I think the fuel trims get reset when the DTC is reset, because after I did it, using TORQUE PRO - the fuel trim was all over the place. She wouldn't start and stay started, idle went weird and it didn't settle down again for 20 minutes or so. So I am happy enough to think that this is more likely to do with the map itself, though it wouldn't harm to do a swap on the lamdba sensor (which one - I assume you mean the front one?). Sadly I don't have one I can use. I need to do the 2nd oil change now. Just toying with the decision to either use mineral oil again or start on the semi-synth?
front was the one I was thinking of, I think the plugs differ from the 850 ones, I do have a v70 one here that I could send you to try if the plug is right, good to hear your getting out and about in her, that will spur you on to get her finished and on the strip...:)
Even with discount FRF will want 250 quid for a new front O2. I wish I knew more about how VIDA works - I've really only scratched the surface. Apparently you can log AFR? I have a wide band AFR gauge but no where to screw it in & TBH once the mapping is done I don't think I will have the mental space to track AFR AND boost whilst driving.
GIYF - just reading up on VS how to log using VIDA.
I will soon be logging with 4.4 and tunerpro and just in the process of setting up vida on my laptop....that could take a while with my computer skill set these days, I used to be good with all that stuff but I have lapsed some what over the years and now need to try and catch back up very quickly.
GWE exhaust was replaced for one fabricated by ShemTek. There is a long list of additional work going on not just including replacing the fuel sender with an 850 so that a return line can be added. Rising rate FPR and Nuke fuel rail is going in. There is additional fabrication on the harness bar. Rear trailing arm bushes have been done too (I think they were original?).
Sadly I couldn't get the Momo steering wheel to fit. The boss doesn't have the right fitting for turn signal cancel and it is too much of a pain in the ar$e to have a car that doesn't have self cancelling signals.
Attachment 32195
Hopefully once the fueling is sorted out the real tuning with all the new mods including WMI can be completed. Some days I find it hard to maintain the enthusiasm to keep this going, but I don't want this car to go onto the long list of failed projects. BTW I've not seen the car since March.
It's good to here that work is still progressing Dave, but as you say, it is hard to keep pushing on with these projects and even harder when our main 1/4 mile playgrounds have been closed. Hopefully York will be back up and running by the time the SSB is ready for action.
I still have your closed deck spare engine thing here.
Update time surely Dave....???
A long overdue update.
I sent Betsy to Shemtek back in March 2018. My Volvo SME list has grown shorter over time and I still like Shem, however communication over that time was protracted and difficult, with sporadic IMs over social media.
Back in 2009 when this thread started I had little to care about. When I started the Garrett GTX conversion, in 2012 - I similarly was pretty care free. These days time is not my friend, so it was less important to push for a final solution. This is as much a contributory factor in the delay. Combine with the distance, balance family needs, my work and the "dream" - who's purpose has diluted over time, all added up to a 30 month holiday. TBH over the last year I was just wanting to get her back.
I like the new exhaust and the poor clutch feel has been resolved.
Anyway I've cleaned her up and started resolving the issues.
Originally when I got Betsy back - she was making no boost. This was due to a sticky actuator and the fact that the intake temp sensor had popped out of the hole in the DO888 pipework.
I have resolved this now, but now I have the opposite issue.
The boost is creeping. I thought this was originally down the the Blitz valve unit, not letting the boost out - which I have changed for brand new unit, but it appears to be a limitation of the turbine hole. With the gate wired fully open she's creeping up to 1.6 bar above 5K rpm. I fully intend to get this sorted either using an external wastegate or modifying the existing port. I also think that the angle to the W/G arm is sub-optimal, but unless I can get the gasses out, this cannot be resolved.
Over the last few times I've been out trying to sort the boost or at least establish the root cause, the long-term fuel trim upper limit code has illuminated my dashboard. (DTC error code 261A). It was pointed out to me yesterday that the idle fuel pressure was on the low side according to the gauge on the aeromotive FPR - just 2 bar. Anyway this evening I was going to adjust it up. I clamped off the vacuum line and it appears that the FPR was sticking or something, as it now reads 3 bar clamped and about 2.75 bar under idle vacuum.
I need to get some AFR logging to understand how the fueling is going and hopefully get the car dialled in.
I hope soon to get the brakes less squeaky, fit the overdue parts for harness and sort the rusty body panels. I am not 100% happy with the ride on the BC coilovers. Last night on B roads kinda made me feel a bit queezy.
Tonnes to do, but I am not ready to throw in the towel. 8.5 years into fitting this damn GTX and still not quite there.
Looked to ride lovely from where I was sitting, as I've said in another post you do need to get an afr gauge in there, if not just for peace of mind on a build like yours, but with the right one it can also give some datalogging, which going by what are small niggles, could possibly point you in the right direction, keep going as you are very close now to what I think you where trying to achieve, it's all a massive learning curve, as are my next steps...:hidesbehi
Well after looking through some recommendations - I went ahead and ordered the AEM X series AFR gauge from DemonTweeks - which comes with an ODBii pass-through connection. It has a very high sample rate and has the added benefit that it appears to be able to piggy back into existing data log software - though with my ECU it is not a given.
Hopefully this will provide the missing data, so I can finally baseline the fueling. I've lubbed up the FPR spring and can see that the gauge is moving when the inlet vacuum changes. I pinged Shem and he said that 3 bar was correct, so we will see what happens once the gauge is installed. What I need now is recommendations for rolling road, who aren't too far away and don't want many thousands of pounds to get the baseline.
I do believe there is a rolling road in Rednall near Oswestry, what they are called I can not recall at present but I can find out for you. Good to here you are putting in an afr gauge, that will really help with seeing what it happening with the fuelling. I do love the AEM range of products, I just wish they did a combined Oil Pressure/Oil Temperature Gauge, as I have a space in dash for one gauge only and want to be able to see both of those at a glance.
I have the oil temp and the oil pressure coming through on additional sensors into the Blitz already. I think my oil pressure is fine. Not sure where my oil temps should be in reference to the coolant. Generally under load it will run about 4 bar oil press and max out on 103 degrees on oil temp. So long as it remains in a good operating window for those parameters, that's all I care about.
Typically it runs around 100 degrees C
Currently running gulf competition oil 10w-60
Gauge landed today. Think I will need to mount it on the a pillar. Where's the best place for the boss?
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