P1514 while SD tuning '98 C5

[Moomba45]

Just learning how to tune and may not have all the info required, but this is more a general question. I'm getting P1514 every time i try to tune Speed Density. Starts out fine as long as I keep driving at 30MPH and below with no load on engine. As soon as I start to increase load, It goes into limp mode and throws P1514 code for TPS. My question is do I need to change a parameter in calculated airmass? I did as much research as I could find but most were posts from 2007 era which may be old and obsolete data. And didn't really give me much insight as to what i should change. Not to mention most were boosted setups.

[blindsquirrel]

how-to-follow-instructions.png

[edcmat-l1]

First, if you've been doing research here, you think you would have read plenty of times, if you want help post a tune file and data log.

Second, if you set it up to tune in speed density you would have had to fail the MAF (arrow) and if you did, you'd think you would have noticed the P1514 table right next to it (circled).



1514 table.jpg

[Moomba45]

SDtune_step1.hpt

And i know where its at, just not what parameters to use for tuning SD and not get P1514

[edcmat-l1]

SDtune_step1.hpt

And i know where its at, just not what parameters to use for tuning SD and not get P1514

That makes no sense. If you know where it's at, what's the problem? That table has a good enough description you shouldn't be here asking why you're setting a P1514 if you know where it's at. You raise that table to keep from hitting the airmass that triggers the code.

[Moomba45]

You know we all have to start somewhere. I'm sorry if I interrupted your day with what you perceive to be a stupid question. One suggestion I have for you is, if your just gonna be an ass, why even respond? Let someone who understands my question answer. I would rather get no response than an ignorant one. Have a great holiday weekend. Hope it treats you better than apparently the week has.

[edcmat-l1]

You know we all have to start somewhere. I'm sorry if I interrupted your day with what you perceive to be a stupid question. One suggestion I have for you is, if your just gonna be an ass, why even respond? Let someone who understands my question answer. I would rather get no response than an ignorant one. Have a great holiday weekend. Hope it treats you better than apparently the week has.

I did understand your question. And I responded appropriately. I showed you the table you need to modify to keep from setting the P1514 code. I'm sorry if you don't like my delivery. Doesn't make me wrong.

[gtstorey]

I rather have no answer than the correct answer that doesn't make me feel good about myself.

[Moomba45]

I know where the table is, just unsure of the parameters to use on an NA basically stock engine. Only mods so far are LS6 intake and CAI. Finding tables are not my issue. Understanding how much to adjust is.

[blindsquirrel]

Aww, does somebody need a cuddle and/or a nap? Here, I will loan you an emotional support monster. She's not as ferocious and scary as she likes to think.

rarr i am a ferocious monster rarr.png

If you are logging the things that make up that table, namely RPM, and TPS, and Cylinder Airmass, it's not some special trick to look at your logs and find out if and where and by how much it's exceeding the values in the stock table.

Or just set the whole thing to the max allowed. Or multiply the whole thing by some arbitrary number, like x1.5.

[Moomba45]

Thanks, that's all I was asking for

[Alvin]

I know where the table is, just unsure of the parameters to use on an NA basically stock engine. Only mods so far are LS6 intake and CAI. Finding tables are not my issue. Understanding how much to adjust is.

2-3 g/cyl across the board will work on just about everything.

Maxing that table in some years causes a instant code. There are two codes 1514 and 1516. One is a tune issue.. one is a mechanical issue. Be sure your checking the right code. The one you can fix has a table in the engine diagnostic section.

[Moomba45]

2-3 g/cyl across the board will work on just about everything.

Maxing that table in some years causes a instant code. There are two codes 1514 and 1516. One is a tune issue.. one is a mechanical issue. Be sure your checking the right code. The one you can fix has a table in the engine diagnostic section.

Thanks, my concern was throwing random number in and making things worse. All Info I was finding was boosted applications and I'm NA. thanks for response. And I will try that if I continue to run into same problem.

[edcmat-l1]

For forced induction vehicles you just max the table. There's no harm in doing that for NA also. You can log your g/cyl and plot it and raise the table JUST ENOUGH if you want to, but why? Multiply the whole table by 2 and be done with it.

[Moomba45]

For forced induction vehicles you just max the table. There's no harm in doing that for NA also. You can log your g/cyl and plot it and raise the table JUST ENOUGH if you want to, but why? Multiply the whole table by 2 and be done with it.

Thanks, wasn't sure what would happen if raised too much. I added x1.5 to table already and so far hasn't gone to reduced power. So maxing it to 4.1 won't effect anything else?

[SiriusC1024]

It's a redundant check to verify safe operation of the electronic throttle. You can take the time to log TPS vs RPM vs Cylinder Airmass and correct if you wish to retain it. Most people just max it out.

[Alvin]

For forced induction vehicles you just max the table. There's no harm in doing that for NA also. You can log your g/cyl and plot it and raise the table JUST ENOUGH if you want to, but why? Multiply the whole table by 2 and be done with it.

Heads up.. I've had issues maxing the table out in certain years. I used to max them all out also.

[edcmat-l1]

Heads up.. I've had issues maxing the table out in certain years. I used to max them all out also.

I have as well but it's very rare. When I do I back it down to 4.00