Tuning file installation

[Sam Harris]

When installing the tune, my instructions say to turn the ignition off, and then the AutoCal will start a countdown timer before I can resume the tuning, or start the truck.

My tune file was flashed, and as soon as it says: Ignition off NOW!, I turned off, and removed the key. But it’s never started a timer, and has been just sitting on the “Ignition off NOW!” Screen for several minutes.

Is this normal? Can I start the truck?

 

[Sam Harris]

Been almost 40 minutes now. I connected the trickle charger.. I don’t see anything else I can do, but unplug the AutoCal, and try starting the truck..?

 

[Dantheman1540]

Huh I don't remember that feature when I had EFI live. I assume it's just to give the ECU a few seconds to reset and rethink but I'm not sure. I would probably unplug and try starting the truck.

 

[Dantheman1540]

That's a scary thing I totally understand your concern. Everytime I see HP tuners erasing the ecu all I can picture is the ecu turning into a brick lol.

 

[Sam Harris]

Huh I don't remember that feature when I had EFI live. I assume it's just to give the ECU a few seconds to reset and rethink but I'm not sure. I would probably unplug and try starting the truck.

Yup. I did. It’s actually running like shit now. BBP told me my MAF is in bad shape and needs to be replaced ASAP, so I reinstalled the stock tune and will wait until the new Delco MAF gets here Thursday. Then I’ll try again. So far I’ve never seen any kind of countdown, it just stays on the Ignition off screen forever.

 

[Dantheman1540]

Well It looks like the countdown is to give the computer a second to think.

That sucks the MAF is failing. I've never had one quit but I have been considering switching to speed density soon. That's one of the reasons I recently bought the new version of HPTuners.

Anyway I'd probably wait 1or 2 minutes to be safe and just start it as usual. With HPT I simply remove the key completely open and close the door to cycle the lights off and wait about 5 seconds before starting it after a tune write. But they never said anything about waiting I do it just because it feels right.

I have also had the truck need to sorta relearn idle after a tune write. Even if the new file had nothing to do with idle. After a couple startups it usually fixes itself.

 

[Sam Harris]

Well It looks like the countdown is to give the computer a second to think.

That sucks the MAF is failing. I've never had one quit but I have been considering switching to speed density soon. That's one of the reasons I recently bought the new version of HPTuners.

Anyway I'd probably wait 1or 2 minutes to be safe and just start it as usual. With HPT I simply remove the key completely open and close the door to cycle the lights off and wait about 5 seconds before starting it after a tune write. But they never said anything about waiting I do it just because it feels right.

I have also had the truck need to sorta relearn idle after a tune write. Even if the new file had nothing to do with idle. After a couple startups it usually fixes itself.

View attachment 249121

Awesome. Thanks man. Yeah I work on computers for a living, so I know what delicate things they are. Lol. And the idle is still definitely off, stumbling a bit and almost dying a couple times, but I thought maybe that was the MAF. Although it hasn’t done it until the tune install, so I’ll bet you’re right. The tune actually seemed to pull a good deal of power, compared with the stock tune, so I suspect he did that to save from any damage I might cause with the bad MAF. Either way, Amazon is supposed to deliver it Thursday -hopefully early! I’ll get that swapped, re-flash the tune, and go from there. I need to data log again for Justin after the MAF replacement. It’s been a PITA so far, since my remote start and radio fuses have to be pulled in order for the AutoCal to properly communicate with the ECU. Oh well. Can’t wait to get her dialed in!

 

[Fless]

Awesome. Thanks man. Yeah I work on computers for a living, so I know what delicate things they are. Lol. And the idle is still definitely off, stumbling a bit and almost dying a couple times, but I thought maybe that was the MAF. Although it hasn’t done it until the tune install, so I’ll bet you’re right. The tune actually seemed to pull a good deal of power, compared with the stock tune, so I suspect he did that to save from any damage I might cause with the bad MAF. Either way, Amazon is supposed to deliver it Thursday -hopefully early! I’ll get that swapped, re-flash the tune, and go from there. I need to data log again for Justin after the MAF replacement. It’s been a PITA so far, since my remote start and radio fuses have to be pulled in order for the AutoCal to properly communicate with the ECU. Oh well. Can’t wait to get her dialed in!

Hope that's all it is, Sam!

 

[Dantheman1540]

What MAF did you end up ordering? Just a stock replacement?

 

[Sam Harris]

What MAF did you end up ordering? Just a stock replacement?

Yessir AC Delco, part number: 19330121

 

[Dantheman1540]

Yessir AC Delco, part number: 19330121[/QUOTE

Just curious I don't really have any experience with different MAFs but I have heard people run different ones before.

 

[Sam Harris]

For the right reason I’d sure be happy to run a different MAF. But at the moment, I just want to get her as clean and happy as possible, to get this tune installed and running well.

 

[BlackBearPerf]

When installing the tune, my instructions say to turn the ignition off, and then the AutoCal will start a countdown timer before I can resume the tuning, or start the truck.

My tune file was flashed, and as soon as it says: Ignition off NOW!, I turned off, and removed the key. But it’s never started a timer, and has been just sitting on the “Ignition off NOW!” Screen for several minutes.

Is this normal? Can I start the truck?

Give us a call 877-809-4070 we would be happy to help.

 

[BlackBearPerf]

When installing the tune, my instructions say to turn the ignition off, and then the AutoCal will start a countdown timer before I can resume the tuning, or start the truck.

My tune file was flashed, and as soon as it says: Ignition off NOW!, I turned off, and removed the key. But it’s never started a timer, and has been just sitting on the “Ignition off NOW!” Screen for several minutes.

Is this normal? Can I start the truck?

After it says ignition off, turn it off, uplug the AutoCal from the OBDII port and then go ahead and start the vehicle.

 

[Sam Harris]

After it says ignition off, turn it off, uplug the AutoCal from the OBDII port and then go ahead and start the vehicle.

Thanks, that’s what I’ve been doing, but including a 2:00 wait. I’ll follow your recommendations. Much appreciated!

 

[Sam Harris]

Give us a call 877-809-4070 we would be happy to help.

Appreciate your reply. I also emailed, so already got a response there. [emoji106]

 

[BlackBearPerf]

Appreciate your reply. I also emailed, so already got a response there. [emoji106]

Right on, happy to help!

 

[Rocket Man]

I always have my driver door open so RAP goes off or else the Autocal doesn’t recognize the ignition was turned off.

 

[Sam Harris]

Still trying to get this dialed in. I replaced the MAF, then cleaned the Throttle Body, next Justin says I may have a fuel pressure issue, since she’s leaning out with the tune. Need to check the pressure. Assuming it’s not around 55-60 at idle, guess that’s a replacement fuel pump. Don’t think there’s likely anything else to do..?

Also wondering if I should upgrade the pump if I need to replace it anyway, for future HP growth.

 

[Rocket Man]

Still trying to get this dialed in. I replaced the MAF, then cleaned the Throttle Body, next Justin says I may have a fuel pressure issue, since she’s leaning out with the tune. Need to check the pressure. Assuming it’s not around 55-60 at idle, guess that’s a replacement fuel pump. Don’t think there’s likely anything else to do..?

Also wondering if I should upgrade the pump if I need to replace it anyway, for future HP growth.

Stock pump is good to about 450 HP so unless you're going with twin turbos you're fine. Superchargers will come with a pump as part of the kit if needed. Yours is a 2003 so there isn't a fuel filter under the driver seat inline is there?