Another thing just occurred to me that will affect how my O2s are measuring at startup - air injection. Mine is fully functional. Sorry I didn't think about this sooner.

No wideband - that's my A/C changing pressure as the engine compartment warms up. I doubt I will invest in one, but if I do it will be several months off.

I don't honestly pay much attention to...

Here's a log of 11c - 73c at idle w/ ~43.5lb injectors. Definitely not seeing an O2 flatline issue like yours, but maybe there's something else that's useful to you here. Closed loop MAF tune btw.
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I would but I don't think I have any logs of bringing the car up to temp at idle with the big injectors. I'll try to make one for you today if I get a chance.

I don't really think my issue is...

I don't think I'm going to tick this one off as a victory, but it's certainly better now than I was able to get to before changing the Base Prime Pulsewidth at 0x2680 and rescaling the whole Prime...

Thanks for the suggestion - I may give it a try if all else fails resolving the 60C restart issue. Other than the scenario where the engine has been hot and left to cool 3+ hours, it's starting...

Well I ripped the big band-aid off first - flashed the most radical change first with BPW of 8600 / 0x2198. Cold start was great. Warm restart on par with I had yesterday after scaling the table raw...

Search me...

I generally don't like putzing around with things I don't (believe) I fully EDIT: (change fully to vaguely) understand but I'm going to make an exception here as I can't imagine it...

I think it's a pointer - look at the multiplier function at 7781. The disassembly calls this l_7781_A*X->D_8x16_Mult_sub



;;* CALL WITH:
;;* A Reg = 8 BIT Multiplier
;;* X Reg = Address og(f)...

Thanks! I spotted that in the disassembly and thought it might be what I was looking for, then had to get started grilling dinner so tuning went out the window.

Don't go out of your way unless you...

Any chance you could steer a machine code impaired hot rodder in the right direction? It's been around 10 years since I last changed a jmp to a nop, and a lot of brain cells have died since then.
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Duh, can't believe I missed that. Need a bigger screen or bifocals.

I'm trying to find where the lookup value from this table is scaled by 1.5625, but don't speak much motorola. I think this is...

I'm not sure I've gotten the start tables perfect but I did at least determine without a doubt what had me chasing my tail on this one.

The "Prime Pulse Width vs. Coolant Temp" table, along with...

I almost went 383 when I found out that it's no longer cost effective to have rods re-sized, and what speed shops are charging for crank balancing these days. But I decided I didn't want to cobble on...

I'm happy to see someone else building a standard displacement LT-1. I've always preferred building a smallblock that puts the fat part of the power band over 5000 rpm. As long as your rod bolts are...

Hope it helps, and good luck! I wish there was a more scientific method for this other than trial and error. Evidently it's a problem that's a lot more prevalent for those of us who've stuck with the...

I meant to post an update on this as more fine-tuning was needed. I still don't think I'm "dead on" but it's definitely improved. The way I've been comparing is to warm the engine up to normal...

I can't thank you enough. Had I known about the prime pulse width table(s) not referencing injector constant it would have saved me dozens of E-side flash cycles and a lot of frustration. I got close...

Thanks! Apologies for not having found it on my own.



Having not scaled the prime pulse tables for the bigger injectors explains why I'm flooded before the cranking VE table takes effect.
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Well thanks, but this just raises about a dozen more questions.

1) if the minimum is 1.4ms why am I seeing 0.75?

2) I must have been using an extremely outdated version of steveos xdf, or have...

Is anyone aware of a "minimum injector pulsewidth" constant in $EE?

I ask because I've removed enough of my Crank VE vs TPS vs RPM table that warm starts are coming in at 0.75ms pulsewidth and...

You also have another 30 cubic inches of displacement, which is not insignificant.



I had the opportunity to do some more logging this afternoon and found the trims aren't very far from what...

Well color me stupid.:mad1: No sooner than I clicked "post" it occurred to me there's a "Crank Volumetric Efficiency Vs. %TPS Vs. RPM" table that I hadn't adjusted to match the main VE tables.
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I think you're confusing the offset vs voltage table with low pulsewidth adder. The tune you shared with me had a populated offset table. I've zeroed the low pulsewidth adder table which is what I...

Remanned 42lb injectors showed up yesterday. Lacking any flow bench data (what happened there FIC?) I punched in 43.0 for IFC and used an offsets table I found for the injector part #s (12561462 -...