he shut it off/disabled it, from what he said.
he shut it off/disabled it, from what he said.
Under diagnostic dtc he disabled it
Yeah i saw it, added the other two MAF DTCs to set on first error as well. Enabling the fuel trims shouldn't prevent it from starting. Your initial complaint of the cold start will be fixed by correcting the fueling, getting it running with the fuel trims will be needed for this.
It won?t start with that file you sent.Originally Posted by twenglish1
Maybe try the last file that ran and enable just the open loop short term fuel trims, just to help us get an idea of what is going on with the fueling. You don't have a wideband O2 sensor installed do you?
No just the oe
That is why we need to get it to run with fuel trims, can't really use the narrowband sensors without it running on fuel trims.
Can I get it from O?reilly? Auto parts store? And just plug them in?
No its a sensor and an AFR gauge. See what this does, this is you original after '04silverado6.0' made some corrections to the injector data and various other things, and i have it set for STFTs only
99_Sierra_original edit 1 - STFT Only.hpt
Last edited by twenglish1; 01-12-2025 at 05:14 PM.
Ok will do. Where do I hook it up for the ecm to read it?
Ive had great experience with the AEM 30-0300, and you can use a pro link cable from HPtuners, or ive used the EGR position sensor input
The first engine run after a reflash will often (always?) not show the Current DTCs in the Details pane until the second engine run, best to add the channel for Mass Airflow Sensor State so everybody can see in real time if it's failed.
I know wideband o2 was installed while tuning on the dyno.
Those original tunes you posted had tons of issues, its not really a surprise that its not running right, do you have the original factory file your the truck? It might be easier to start from scratch vs trying to patch together a file from something that was already heavily modified.
No. Everything was done on his mpvi2. I could ask him but the stock file didn?t have the 8.1l injectors
Stock file with 8.1L injector data would be the place to start
I have a 04 Tahoe that I could pull the stock file from for comparison. It?s bone stock
Also could see if I could pull the stock file from my brother suburban that has the 8.1l. Would that get the injector data?
I would check the HPTuners tune repository on their main website, for a truck with your same engine and same year, can use compare function to revert parameters back to stock
I?ll look. Tried looking before and couldn?t find anything with the 5.3 with 8.1l injectors.
Stock was 24# and the ones I currently have in are 42#
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