HP Tuners users heads up
Why do you dislike HPT? Any specific reason? HP Tuners has been good to me, and they just helped me yet again figure out that I had a mechanical/electrical fault somewhere else.
If what just happened to me, happened to you, you would have been just as stumped as I was. My coils decided to die literally the moment I tuned the car after using v4.2 for the very first time. The timing of how it happened, was ridiculous. And I had also fault diagnosed a bunch of other stuff before thinking It was HP tuners and saying anything. I just never thought these coils could work so well , and then just hit a brick wall at one rpm like that, and be so consistent about it. But they can, and they did, it happened. Like I said live and learn.
And you know what, if this happened to me it'll happen to someone else, and now I've helped the next guy save a bunch of hassle and pain. And FYI, the day I swapped the coils, I had the valve covers off, checked pushrods, rockers, springs. I found nothing wrong. At that point it hit me that the coils were literally the last item that I hadn't swapped over and I had a funny feeling that I was about to hit the road and have my car back again. And I did.
There's nothing at all wrong with HP Tuners. GM not giving us a simple way to test bench their coils on the other hand...
https://www.bitchute.com/video/TCrxy3AUVzdn/
Also i've since fixed the afr. I was stuck on the open loop table. It's now a rock steady 12.8-13.0 at wot and with the 85mm maf fitted and the car pulls stronger than ever before. I forget the amount of times i went back/forth with two different stock ls1 mafs and tuned accordingly once i figured out that version 4.2 was changing parameters, and i had resistance checked all the wiring and checked the grounds, thinking it may have been the maf itself causing the rpm issue (even though it was throwing no codes and should just switched to SD anyway). The rpm limit issue was there with 3 different mafs and 2 different crank sensors, without fail at 6800rpm everytime, like a rev limiter. Listen to the vid how it revs clean everywhere else. I was fighting it for a whole week, it's not like i didn't drive it enough and it didn't show any sign whatsoever of stumbling or misfire anywhere else except at wot, as soon as i'd hit 6800rpm and it was acting exactly like bouncing the rpm limiter. Even my buddy was stumped and he's had his fair share of performance cars and ls's included. We'd both never experience this previously. It threw no misfire codes even though they're all turned on.
When HP Tuners confirmed that everything on their end was 100% good, i knew i had to go back to a fault with the car. After i pulled the covers and the valve springs were all intact and no bent pushrods or loose rockers i just knew the coils had to be the final culprit. There was nothing else remaining but a cam lobe or lifter could have chewed itself out, but i knew it hadn't because there's no bad noises or metal in the oil. And why i didn't think of the coils sooner was because of how there were no misfires anywhere else, the car just ran too properly like it always had, except for the rpm limit issue. And i searched the internet for hours trying to find anyone else with the same issue and couldn't. The one thing i did note was someone mentioned that the wideband will actually LEAN when a ls coil misfires, rather than richen. I found that info after i thought it was a bug with HP tuner new version.
From this point forward i'll always have 8 spare new coils lying around as i'm going to be progressing with the car. I think the heat must slowly deteriorate the coils and some or all of them just couldn't spark over a certain cylinder pressure, but were working fine at lesser cylinder pressures. These coils are taken from cars/engines that are pushing 18 years old now and have been driving around in the hot summer with stock thermostats with the a/c on. The coils absolutely bake in summer temps sitting on the valve covers like they do. Just like ignition wires deteriorate with heat and they don't always completely die but their resistance just increases to the point the spark gets weaker and weaker, i think the coils are doing similar thing.
Its not easy to do a lot of these things we do and finding a way to make it easier for tuners is a HUGE window of opportunity. Maybe these types of threads will help with that, one can hope at least.
I see the entire process of building and modification as discovery + solution. The more power we have to aid in discovery the more likely we are to create a better solution. Thats the precise value of forum communication on specific concepts. If no one had problems or had to think about what to do next? There would be no need to ever post up about anything.
I see the entire process of building and modification as discovery + solution. The more power we have to aid in discovery the more likely we are to create a better solution. Thats the precise value of forum communication on specific concepts. If no one had problems or had to think about what to do next? There would be no need to ever post up about anything.
The viewpoint stating that something did NOT help in solving a problem is not particularly useful. Edison failed to make a light bulb a thousand times so let's all focus on what didn't work? No thanks. You're welcome to your opinion and talk in hypotheticals and "discovery + solution", I will stick to solving problems quickly with value added information.
BTW Edison never invented the lightbulb. He "acquired" the technology from the Canadian inventors Mathew Evans and Henry Woodward who patented incandescent light bulbs five years earlier. Maybe you can see how I value the whole story instead of coles notes that MOST people know. I like to know as much as possible, good bad all of it. To each their own
The Best V8 Stories One Small Block at Time
BTW Edison never invented the lightbulb. He "acquired" the technology from the Canadian inventors Mathew Evans and Henry Woodward who patented incandescent light bulbs five years earlier. Maybe you can see how I value the whole story instead of coles notes that MOST people know. I like to know as much as possible, good bad all of it. To each their own
imo. If yours differs thats fine I do not get upset by such, its all ok to think differently. No harm, no foul to each their own
imo. If yours differs thats fine I do not get upset by such, its all ok to think differently. No harm, no foul to each their own
To be even more precise the only reason there was the assumption HP was too blame was because the software cannot perform telemetry with the components YET, to inform users that they have an issue to see to before tuning. This seems a quite sensible feature to me as we have this with some work related systems so why not HP? There is value in the confusion no matter what you want to think it is there
To be even more precise the only reason there was the assumption HP was too blame was because the software cannot perform telemetry with the components YET, to inform users that they have an issue to see to before tuning. This seems a quite sensible feature to me as we have this with some work related systems so why not HP? There is value in the confusion no matter what you want to think it is there





