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Is this a new issue that did not used to exist, or the way it's always been? Stock engine internals (cam, heads, etc)?

The GenII LT's do seem to like their timing, but as far as the 5 degrees of...

+1 noticed this too on the special functions wigging out a lot on E38 controller, so also curious to hear if there are any tricks...

Check the factory narrow band oxygen sensors/wires. Ran fine, then exhaust work, now runs fine cold (open loop) but not warm (closed loop) is pointing my mind there; did the sensors get compromised...

With a "stage 1" cam, I wouldnt think you should be too far off from stock on cranking fueling. One thing that I have seen cause the exact same symptoms you described is a leaking check valve in the...

I hear ya there.
Im re-curious on what that Advance Fuel Flow parameter is now... I don't have any logs with it but looking at yours its like the two parameters are fairly close until high...

hmm, ran into those exact same warm startup symptoms and found it was the fuel pump check valve. I know you said you replaced it, but if there was a tiny bit of debris in the tank that stuck in the...

Not sure what the Advance Fuel Flow parameter is, so i guess I'd join in on that question. But when I first started fooling with PWM fuel pump GenIV stuff I did log and verify with calculations that...

Every few years I go through a whole mobile workstation research phase since I have to keep a pretty stout machine for 3D Laser scanning, CAD, and structural and flow simulations. The processor,...

Cool, good to know!

know that was a while ago, but if the VTT table is in Nm it would read about 25-35% higher than if it were in ft-lb, im hoping the dyno units were same as VTT units?

This is now relevant to something I keep seeing, but am questioning...
Isn't the "Delivered Engine Torque" PID a calculation being done based off of the virtual torque table (or at least the...

Sorry if this was already common knowledge and I didn't find it! Not a big deal but looking at the stock values in table ECM 12123 I had a feeling the "Park" and "Reverse" row labels are swapped. I...

I just updated my VCM suite a couple days ago to look at a log file for a new user on here, trying to help, and got that little surprise also. Would be nice if there was more of a big red-flag...

Nice, like the 70-72 Camaros.
If you're having any specific issues or areas/conditions in particular you want to improve, a post in the GenIII engine tuning forum will probably get some response on...

Cool, don't hear 'cammed Saab's every day! The rear o2 stuff is just a matter of going through every line of the Engine diagnostic tab and switching everything pertaining to O2 bank1 Sens2 and bank2...

Haha that sounds about right. Well even with the 9" wheel and 275/45 you'd be a big step in the right direction!

I used to consult with the vehicle dynamics engineering leader a lot at my old job for my "government" projects (roadracing car) and his assessment and my butt feel of that same question (aside from...

Nice. Im trying to picture how the head gasket seals between cylinders... O-ring type right at the edge of the bore?!?

I wish F1 news that popped up everywhere all the time was about things that...

@asquinton do you have a good instantaneous MPG maths for your VCM scanner? If you create one using trans output shaft rpm instead of VSS it will give you MUCH more resolution.
If you can get a...

I have worked on a couple customer projects where I pulled the GMPP tune files, but they were running standalone 4l80e controllers. Did GMPP actually configure any connect and cruise controllers to...

+1 ^ vote

Was fortunate enough to attend a couple F1 GP's in the V10 and V8 eras - they sounded so much more brutal! I think the ear damage factor was right there with top fuel, with earplugs out it was like...

Yeah, its unfortunately getting like that in every industry - there are fewer and fewer skilled tradesmen left, so all the hacks trickle in to fill the void. Worst part is its a catch-22; unless you...

*edit* 5FDP beat me to it^ :D

Is it a stock crate engine, or very mild cam/heads? If so, the safest bet would be just leave a stock calibration in it and just putz around for a few trips long...

Not sure if its my browser (but doesnt do it on other sites) or the forum settings (didnt see it anywhere in settings or profile), but it seems like after only a few short minutes of "inactivity" I...