been play with HPtuner
Thread Starter
On The Tree
Joined: Sep 2014
Posts: 119
Likes: 0
From: Lexington KY
been play with HPtuner guys i been playing not tuning with our Hptuner, i have a 55 with a 5.3, i first turned on my front o2 sensors to help with gas mileage now i am working on lowering my high idle on cold startup here are few screen shots ,, if anybody can help feel free to let me know , we are are very new to this and going real slow , i know i need to move my filter , its pulling hot air in , after the fan kicks on it lowers down
thanks
saved reading is the first
start up engine warm
engine at idle
last one is reading engine still cold
thanks
saved reading is the first
start up engine warm
engine at idle
last one is reading engine still cold
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
The stock tunes are easy to find on the HPT site.
I looked at your tune and noticed:
1. Injector size is about 32 lb/hour which is bigger than stock
2. PE table leaned out to 1.15, which is better than the stock 2.25.
3. Your Spark table has much more advance at WOT than stock, also good.
4. Your high throttle VE values are curiously 5% less than stock.
Also, you Idle Airflow values are completely different; just about every one is different from stock. Since you have a stock cam, I would go back to the stock 2002 Camaro values and change as little as possible from there.
I looked at your tune and noticed:
1. Injector size is about 32 lb/hour which is bigger than stock
2. PE table leaned out to 1.15, which is better than the stock 2.25.
3. Your Spark table has much more advance at WOT than stock, also good.
4. Your high throttle VE values are curiously 5% less than stock.
Also, you Idle Airflow values are completely different; just about every one is different from stock. Since you have a stock cam, I would go back to the stock 2002 Camaro values and change as little as possible from there.
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Staging Lane
Joined: Oct 2012
Posts: 54
Likes: 1
From: Calgary Alberta Canada
Can't open your tune at work but from the screenshots your idle timing looks really low. I'd bring that up to at least 15-20 degrees.
Check out the idle thread on HPtuners forum called "about to throw in the towel nailing down idle" or something like that. 5 litre eater has a great method of nailing down idle airflow that really helped tame my big cam and clean up idle corrections.
Check out the idle thread on HPtuners forum called "about to throw in the towel nailing down idle" or something like that. 5 litre eater has a great method of nailing down idle airflow that really helped tame my big cam and clean up idle corrections.
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Verdad Gallardo Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
Keep in mind that the OP says he has a stock cam; there should be no need to make "big cam" changes.
I just looked at the all the spark/advance tables, and the idle advance should be around 28*. While the screenshot above shows 14.5*, I suspect the overspeed table is reducing it as much as possible.
I now see that the base idle airflow table has values of 0.0 (!) for Drive, which is completely wrong; the Park/Neutral values are reasonable.
Perhaps the throttle adjustment screw is too far in, the TPS voltage is too high and the TPS % is not zero.
There are so many changes all over the place, that it is hard to determine the root cause. I would suggest the following:
1. Start with the 2002 Camaro stock tune.
2. Change the Injector Flow rate to the values in your current tune.
3. Change the PE table to the values in your current tune.
4. Change the High and Low spark table to your current tune.
5. Possibly change the Idle Spark Advance tables to your current tune.
That is just my amateur opinion.
I just looked at the all the spark/advance tables, and the idle advance should be around 28*. While the screenshot above shows 14.5*, I suspect the overspeed table is reducing it as much as possible.
I now see that the base idle airflow table has values of 0.0 (!) for Drive, which is completely wrong; the Park/Neutral values are reasonable.
Perhaps the throttle adjustment screw is too far in, the TPS voltage is too high and the TPS % is not zero.
There are so many changes all over the place, that it is hard to determine the root cause. I would suggest the following:
1. Start with the 2002 Camaro stock tune.
2. Change the Injector Flow rate to the values in your current tune.
3. Change the PE table to the values in your current tune.
4. Change the High and Low spark table to your current tune.
5. Possibly change the Idle Spark Advance tables to your current tune.
That is just my amateur opinion.
Thread Starter
On The Tree
Joined: Sep 2014
Posts: 119
Likes: 0
From: Lexington KY
thanks guys
i was told that i have larger injectors , but this is something to start with for sure , the car runs great all but the high rev on start up , i checked it again and it goes to 2k on start up ,, like i said it runs great ,, i am hoping to get better gas mileage after i got my o2 working , we'll see
thanks again
i was told that i have larger injectors , but this is something to start with for sure , the car runs great all but the high rev on start up , i checked it again and it goes to 2k on start up ,, like i said it runs great ,, i am hoping to get better gas mileage after i got my o2 working , we'll see
thanks again
Teching In
Joined: Aug 2014
Posts: 10
Likes: 0
What trans are you running? Be sure that the PCM thinks its in park/neutral. I had an issue like this and it was thinking it was starting up in gear which was hanging the IAC open. It would decay out but was very slow.
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
You can confirm that the PCM is switching by logging "Idle Base Gear Airflow" in the scanner. You don't even need the engine running, just the ignition on and move the shifter from Park to Reverse, to Neutral to Drive. That value should change, assuming you have different values for "Gear" and "P/N".
Note that the value will be much higher than the Base table because of other adders for starting.
Staging Lane
Joined: Oct 2012
Posts: 54
Likes: 1
From: Calgary Alberta Canada
Please keep in mind that having the correct base airflow is important regardless of what cam is installed. The process i mentioned will work for any cam, any engine but if you'd rather fumble around ripping off stock tunes that's fine.
Thread Starter
On The Tree
Joined: Sep 2014
Posts: 119
Likes: 0
From: Lexington KY
is there stock 5.3 tunes here ? ill do some searching
i did see that my PRNDL Equipped is set to none under system , is that right ??
i check another 5.3 tune and its set to PRNDL
thanks
i did see that my PRNDL Equipped is set to none under system , is that right ??
i check another 5.3 tune and its set to PRNDL
thanks
Last edited by lilrobo; Sep 10, 2015 at 04:08 PM.
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
If you haven't already, create an account on HP Tuners and you can then easily access stock and custom tunes.
If your shifter has switches for Park/Neutral, I would suggest wiring them up to the PCM. (I think it is pin 36 on the C1-Blue connector)
The set PRNDL to "PN Only".
If you don't have any switch, then "None" is probably better, but i don't know which line of the Base Idle Airflow table it would use. You will have to find a compromise between Park/Neutral and Drive.
gmorris: Yes of course the method of recording and then setting the Base Idle Airflow works for any cam. If you look at the OP's tune you will see that nearly every Idle related table/setting has been changed to a non-stock value. Maybe you know how the minimum changes to fix his problem, but I would have to start over with stock values.
If your shifter has switches for Park/Neutral, I would suggest wiring them up to the PCM. (I think it is pin 36 on the C1-Blue connector)
The set PRNDL to "PN Only".
If you don't have any switch, then "None" is probably better, but i don't know which line of the Base Idle Airflow table it would use. You will have to find a compromise between Park/Neutral and Drive.
gmorris: Yes of course the method of recording and then setting the Base Idle Airflow works for any cam. If you look at the OP's tune you will see that nearly every Idle related table/setting has been changed to a non-stock value. Maybe you know how the minimum changes to fix his problem, but I would have to start over with stock values.
Thread Starter
On The Tree
Joined: Sep 2014
Posts: 119
Likes: 0
From: Lexington KY
thanks
its a aftermarket steering column ,so no switches , i have a accout over there i will check it out and look for a stock 5.3 tune , the only thing i know different is i do have larger injectors , thats all i know from stock . like i said it runs great ,as is but the high idle on start up , maybe i can find a few other things that might make it run better and get better MPG
thanks again
its a aftermarket steering column ,so no switches , i have a accout over there i will check it out and look for a stock 5.3 tune , the only thing i know different is i do have larger injectors , thats all i know from stock . like i said it runs great ,as is but the high idle on start up , maybe i can find a few other things that might make it run better and get better MPG
thanks again
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
Looking at your tune again, I see you are without a MAF and are running Open Loop (OL).
According to the peak in your VE table, your max torque is around 5200 RPM versus 4400 for stock. Therefore your engine may have a moderate cam upgrade too.
Do you have a wideband gauge and logging on your car?
IMHO that is the only way to even begin tuning as the first step is to get the VE table dialed in as much as possible and then work on the idle.
Without a MAF and OL your VE table determines all fueling. It will determine your power, your gas mileage, your idle, everything.
You said you "turned on your front O2 sensors", but they are not turned on in that tune; your Closed Loop (CL) enable temp is set to 285.
I notice that none of the 100+ members here that know tuning way better than me are chiming in, probably because they are thinking "buddy, you need to start over from scratch".
Therefore I am going to step out now too - install a wideband O2 if not already, follow my steps in #9 above, and you should have a reasonably well running car. Find a tuning tutorial on HPT for tuning from scratch with a wideband and follow it.
According to the peak in your VE table, your max torque is around 5200 RPM versus 4400 for stock. Therefore your engine may have a moderate cam upgrade too.
Do you have a wideband gauge and logging on your car?
IMHO that is the only way to even begin tuning as the first step is to get the VE table dialed in as much as possible and then work on the idle.
Without a MAF and OL your VE table determines all fueling. It will determine your power, your gas mileage, your idle, everything.
You said you "turned on your front O2 sensors", but they are not turned on in that tune; your Closed Loop (CL) enable temp is set to 285.
I notice that none of the 100+ members here that know tuning way better than me are chiming in, probably because they are thinking "buddy, you need to start over from scratch".
Therefore I am going to step out now too - install a wideband O2 if not already, follow my steps in #9 above, and you should have a reasonably well running car. Find a tuning tutorial on HPT for tuning from scratch with a wideband and follow it.
Last edited by mrvedit; Sep 10, 2015 at 08:54 PM.
Thread Starter
On The Tree
Joined: Sep 2014
Posts: 119
Likes: 0
From: Lexington KY
thanks mrvedit
you might be right , i might have to get someone to re-tune this for me , would i get a engine light if they wasnt working ?, i would love to get a stock tune and load it and see how it does , i will work on what you said in #9 and get back , i am going slow with this , lucky the car runs great , maybe it will run better once i redo it
thanks
you might be right , i might have to get someone to re-tune this for me , would i get a engine light if they wasnt working ?, i would love to get a stock tune and load it and see how it does , i will work on what you said in #9 and get back , i am going slow with this , lucky the car runs great , maybe it will run better once i redo it
thanks