Graphite Green 9-5 Aero rescue

[fka]

Could be holding back because of knock, or false knock.. Failing DIC or in my case I had a dodgy earth - possibly two. Although in my case it was very intermittent and only when fully up to temp. I see no more than 900mg/c on a stage 3 map.

[carrera]

I think I see more than that on my non-Hirsch grey one

The green one has no error codes. The grey one throws 1312 and 1334 randomly and occasionally on start up. Maybe my dodgy DIC is better than my good one

[fka]

I had no error codes with the bad earth, just the symptoms.

[phoenix]

If it's a knock issue, MReq drops. I've been chasing it on mine for some time. It's intermittent (of course) but the symptoms are floor it and only get Mreq of about 900 or so. it will slowly climb but doesn't get anywhere near where it should be. So far I've run new earths in and changed the DI for a genuine brand new one.

[carrera]

Without wanting to teach granny to suck eggs....

Have you enabled ECM Stat in Opensid ?

I thought this was giving the limit for Mair, but I just read something which says it says what is limiting Mreq

Useful links here https://www.trionictuning.com/forum/viewtopic.php?f=4&t=11688

[carrera]

I have uploaded the new map to the car.

I believe that ECMS is showing the Mreq limit, after a bried drive I have seen the following limits in operation:

10 - Limit is pedal map (i.e not pressed)
12 - Idle control
20 - Max engine torque - this happens when building speed from low revs, the torque being created is limited by the map (to avoid overstressing the engine / box, especially 5th I think)
41 - Min load - on the overrun
50 - Knock airmass limit - this is the limit that dictates the shape of the power curve once past the low speed engine torque limit

All seems to be working as designed, I need to look elsewhere. Earth next

[carrera]

Earth was clean. Cleaned it, refitted no change.

Decided to do the bolt mod again, as detailed in the Saabnoob post I linked to.

Top pipe off, block that pipe, leave the port open.

 

Now i need to find out if it's the APC, or one of the one way valves in the EVAP system I think ?

[carrera]

Odds on it's a one way valve, so after looking on WIS and EPC I didn't really get a good view of the components involved. Then I had a bright idea. I should have one off the breaker. Found it, tested it, one of the one way valves has failed, I can blow from the manifold end all the way to the T7 valve 

As I didn't want to have wasted my time getting this out, I thought it was time for a picture and a schematic

The valve that has failed on this pipe is the one on the left. Exactly what I think has happened to the green car. Do you agree ?

I am relieved that I didn't remove the pipe from the car first. 

[fka]

Sounds like you've got it.. I refer you back to Will's diagram, it's the valve on the line marked with a red dotted line. Just remove it and either blank the T pieces or replace with a new hose. That line is deleted in the later cars..

With ref to ECMS - these were Karl's wise words when I asked him if he'd enabled it on OpenSID when I was hunting for the cause of my high knock count/ max MAir of 900mg/c..
"ECMS will only tell you what the ECU is being told but if that is due to a duff/fake DI or a bad battery or earth then searching for knocks is going to be a red herring."

[fka]

If it's a knock issue, MReq drops. I've been chasing it on mine for some time.

You've still not got to the bottom of it! That's a major bummer 

[carrera]

Thanks

I couldn't make sense of Wills' diagram, that isn't how it's piped on the earlier cars...... or I still don't get it.

They're a challenge to get off aren't they. Got one side off, but on the other side it seems as though the plastic inner liner has separated from the rubber outer and is firmly shrunk onto the plastic nipple with the retaining ridges.

I thought I would experiment with that before trying to source some more valves 

I have seen MReq up at 1200 and Mair at 1060 on the run home 

[fka]

Sounds like you've got it.. I refer you back to Will's diagram, it's the valve on the line marked with a red dotted line. Just remove it and either blank the T pieces or replace with a new hose. That line is deleted in the later cars..

Sorry I take that back - it's the valve going to the intake isn't it..
That's odd because if that one has failed, it should only constitute a boost leak if the EVAP valve was open when you were on boost - which it shouldn't be! Has you EVAP failed too?

[fka]

I've always found this helpful. It's correct I think for your year..

[carrera]

Ah, I have seen that before, but didn't come across it when reading WIS this evening.

That is correct for this car 

[sgould]

The red line is the one to remove. Incl. the non-return valve (13) on that line.