I see that now haha will come up with something. Finally had time to play with this again, went out for a drive watching the fuel pressure doing the same thing except I had unplugged it to fit a...
Type: Posts; User: djamesp
I see that now haha will come up with something. Finally had time to play with this again, went out for a drive watching the fuel pressure doing the same thing except I had unplugged it to fit a...
Cant tell for sure on the mechanical, its mounted on the rail and it only does this under load. If I can't figure it out an easier way Ill run a line into the cab and check again. No fuel in the vac...
Long story short anytime i crack open the throttle my fuel pressure sensor pegs to 130psi+ (i dont have the transform set up exactly right, so the numbers may be a little off) then drops/bounces all...
Gave it some time to sit and think. Broken plug wire, off the engine and relaxed it made good contact ohmed same as the others but snapped onto the coil+plug bouncing down the road it would miss like...
You're right they're definitely off and so far thats the only suspect thing ive come across while testing. I was unaware of segment swaps changing wiring, I used these pinouts...
I guess I don't understand what I would see by unplugging a coil vs an injector. The only reason I saw a discrepancy in the first place was in the Scanner -> Functions -> Fuel -> disable injector #X,...
100% yup per GM driver bank front to back is 1357 passenger 2468. i just tied an tucked the harness a month ago :( Don't suppose I could cheat and swap firing order around in the tune to check..? Oh...
OK so I attached a pic of the cylinder numbering when I go through the scanner functions window to disable individual injectors and if I understand correctly how theyre numbered this is way off. My...
Yeah per my understanding once the maf is disabled all misfire logging goes out the window. Every bistory/current/total count is zero. I've been trying to find someone I trust enough to power brake...
Sure, to me it feels just like a standard-issue P0300 truck, kinda dogged out, exhaust volume drops off a cliff and sounds muffled, etc. Difficult to describe I may have to drive again to be sure....
Sorry I meant the narrowbands usually read rich but drop <100mv for misfires. I usually watch my AFR readout from the wideband that displays the opposite way, thats how i came up with "spike".
Damn. I tried a few misfire diagnoses methods but didn't think of testing individual temps. Thanks for the tip I'll give it a whirl.
Bank 2 is the one leaning out.
I can't get anything...
Started having a random miss that I cant pin down to a single cylinder by disabling injectors and running speed density so no misfire data either. I can see the narrowbands/AFR spiking but not sure...
05 silverado with a 5.3 running a 4l80 from a 00 6.5 diesel 2500. recently overhauled a bunch of stuff including swapping the diesel converter out for a higher stall out of a later model (06?) 6.0,...
ah yup that makes sense. changed x2 tables and see when i can give it another go. Thanks!
Yikes, glad I asked. I haven't found the right words to google this, but when Im targeting these values am i gradually ramping in until peak boost or should I be looking for that target value as soon...
Here's a different log, same issue. Return system, 58psi w/vacuum referenced regulator, MAP sensor was questionable (at least I'd never heard of em) but bench test was pretty damn close to the data...
normal 02 chart readings? could use advice
Getting weird variations in AFR with everything off, should be running entirely off the VE table, but dropping it into drive while stopped sometimes gives me a ridiculously lean reading, wideband +...
That definitely makes sense, and it fired up with brake cleaner no problem. Changed maf fail to 0 and sure enough it took right off failed maf, etc. Thanks to both of ya for looking in to it! I...
Right, i should have picked a better file - that one got hammered was after digging out old tunes/copying sections/reflashing and getting nowhere fast haha. Does this look better as far as the VE...
That it is, not sure when that happened... Changing it back to 0.5927 from the data sheet is giving me the same no start. Map sensor is...
03 silverado 4.8 next gen 7875 & 4l80e 3bar os. was running ok enough to tune by, then i changed to some less-sketchy-looking deka 80 data, flashed, no start at all or sputters then dies. Flashed...
just finished swapping 4l80e out of a 2000 K3500 2WD 6.5 diesel behind a 2006 turbo 4.8 in a 2003 truck, 3bar OS. Performed everything by the posted steps, install, steps segment swap etc. Surprised...