Immortalities totally random thread

[The1]

How does maf Hz look does it spike as well in same place, I may need to fix inj DC calc in enhanced adx

[immortality]

MAF Hz keep climbing but start to drop at the spike.

maf hz.png (46.09 KiB) Viewed 6551 times

Isn't the standard V6 MAF doing well

edit: I think I might try adding in some more timing. I was pulling timing out to get rid of the knock retard but I'm thinking now that the knock was caused by a sick injector that was also causing the variation in fueling between the banks.

I looked further through the log and later on I gave it another boot full and it did exactly the same thing were Cylair drops after 5200rpm.

[MAGP]

That spike corresponds with a few things that I wonder what is going on.
1. It happens at the same time you appear to decelerate (speed limit again?)
2. The AFR Commanded goes down from 11.9 to 11.? so it is getting richer
3. It appears the Spark Advance goes from 8.44 to < 8.44 which is fine if you are loading it up but are you at that point.
4. The Inj Pulse changes at the same point.
5. The TPS shows 100% for another 2 seconds

Is the TPS sticking, thus feeding the wrong signal causing other measurements to also be wrong, or is the engine decelerating because of the spike?

[The1]

that looks different to the log attached on the previous page, going by that log it looks like it's normal gear change with the RPM dropping which will cause a little spike, Though it looks like the trans data wasn't logged so hard to confirm, but that's what it looks like to me, can you post the log from the screenshot above as it looks different.

[immortality]

That spike corresponds with a few things that I wonder what is going on.
1. It happens at the same time you appear to decelerate (speed limit again?)
2. The AFR Commanded goes down from 11.9 to 11.? so it is getting richer
3. It appears the Spark Advance goes from 8.44 to < 8.44 which is fine if you are loading it up but are you at that point.
4. The Inj Pulse changes at the same point.
5. The TPS shows 100% for another 2 seconds

Is the TPS sticking, thus feeding the wrong signal causing other measurements to also be wrong, or is the engine decelerating because of the spike?

No. The spike happens during the gear change from 2nd to 3rd but I'm not to worried about the spike. What has me concerned is how the Cylair is tapering off after 5200 rpm till the gear change.

[immortality]

that looks different to the log attached on the previous page, going by that log it looks like it's normal gear change with the RPM dropping which will cause a little spike, Though it looks like the trans data wasn't logged so hard to confirm, but that's what it looks like to me, can you post the log from the screenshot above as it looks different.

Screenshot is the same, I just re-scaled the Cylair so it didn't look like a flat line and added more data traces. I'm not to concerned about the spike during the gear change just how the cylair starts to drop after 5200rpm.

The only other thing that springs to mind is that VE is taking a dive as it's run out of cam?

[0081]

Mine had the same drop off at 5200rpm also, and when on the dyno that was the same point where power dropped off.
I thought it was a restriction of my intercooler but even after I fitted a larger core it was still there.
You could also feel the power drop off when driving around that point.

I have since fitted another M90 that I had ported around the rotor enter quite alot and fitted a larger throttle body. I can't feel the drop in power anymore but I can't check my logs to see if the cylair dip is still there as the laptop has decided it doesn't want to turn on anymore

[immortality]

Mine had the same drop off at 5200rpm also, and when on the dyno that was the same point where power dropped off.
I thought it was a restriction of my intercooler but even after I fitted a larger core it was still there.
You could also feel the power drop off when driving around that point.

I have since fitted another M90 that I had ported around the rotor enter quite alot and fitted a larger throttle body. I can't feel the drop in power anymore but I can't check my logs to see if the cylair dip is still there as the laptop has decided it doesn't want to turn on anymore

Interesting.

Yes, you can feel it, like it looses some acceleration, just those last few hundred rpm before the gear change.

[MAGP]

Without reading the everything again I'm assuming you have the stock TB, do you think you might be reaching then limit of flow?

[immortality]

Mods are, 69mm TB, larger elbow, MACE CAI with my cold air mod. Full twin cat back V8 exhaust, 10psi pulley and 1.9 rockers.

edit:I'll have to run it again with the MAP sensor connected (it's not wired in permanently) and see what is happening with the boost pressure but previously boost pressure was holding up until gear change so I don't think that is an issue.