RAFIG has no data for iac_ld iac_sd

[TJWells]

I'm trying to correct my idle so I can drive my car to do Calc.vet. When I log Rafig I have no data in Rafig. I'm sure it's due to no IAC short or long term correction data. Could someone take a look at my tune and log and tell me what I need to do?

[nonnieselman]

Ive been having issues trying to get RAFIG/RAFIP to work for years. I just use HPT to datalog that and make my changes in EFI Live. :music_whistling_1:

[TJWells]

I'm almost at that point. However that means I need to purchase hp tuners. I know others have done this process successfully, I guess I just need to wait till one of them replies. I do not want to go to HPT. However if that's where the support is I gotta go. I've read other threads talking about modifying the throttle body to adjust it under .6v but I'm using a 4 bolt 90mm gold blade. I dont see a way to modify it. other than drilling holes in it, which I don't want to do. I also have a p1516 code that I'm working on too. It's a lot to learn, and I'm starting with basically nothing this time not just modifying an existing working ecm.

[nonnieselman]

Post up when you figure it out.
You have a cable throttle?
Sometimes with the crappy chinese throttle bodys you have to drill a hole to help. Im to the point where i wont tune a car/truck if it has that junk.
P1516 could be a setting in the tune or even a bad connection somewhere.
It wont let me open you tune. What software version are you running?

[TJWells]

I'm using v8 version 8.4.58. using a new GM throttle body for the same reasons you mention. not cable driven.

[nonnieselman]

On the silverados/Tahoes P1516 is usually either from TPS sensor or the yellow wire broken at the TB.
If you look on Charm.Li it will give you the diag tree on how to diagnose it to see if its wiring/Connection issue.

[TJWells]

Thanks for the info. I am a GM Parts Dept. Mgr. I have access to GM SI info which is the same. In this case, it doesn't help. The problem is the 90mm gold blade. when I scan it with chart b showing the round gauges, I have a thin yellow line around the gauge. The actual throttle input is refferenced as a thick blue line. When I press the throttle down the blue line passes the yellow line and p1516 sets and goes into REP. I'm sure this is the tps 1 or 2 that isn't scaled correctly for the gold blade. I just don't know how to correct the scaling.
Still have no input into the no IAC info for RAFIG. However, maybe if I get the scaling right the voltage will drop into a correct area for rafig to work.
Does anyone know where I go to adjust the tps 1 or 2 scaling?

[nonnieselman]

Did you adjust the ETC Scaler?

[TJWells]

NO and that's probably my problem. Do you know what I need to adjust? I was just gonna keep guessing and flashing till I get the Yellow bar to move.

[nonnieselman]

Look at B4349.
Is it at .0208?

Try .0157 and then .0240 to see if there is any difference.

[nonnieselman]

Is this a silver or gold blade TB?

[TJWells]

Gold blade new from GM.

[nonnieselman]

Do you have the correct X Link?

[TJWells]

Correct X link? now I'm confused. I believe I have the caspers jumper harness. for the 90mm. and this did work on the previous engine with a larger TB. I bought this car with a disassembled 383 and a fast 102 intake with a 90 mm on it that did work. should I just go back to the silver blade? That might be an easy fix, but I'd rather understand what needs changed. It does work, but really oddly. That's why I'm trying to do RAFIG.

[TJWells]

I will check B4349 as soon as I get home.

[TJWells]

Look at B4349.
Is it at .0208?

Try .0157 and then .0240 to see if there is any difference.

I have it set to .0192, I found that on this forum supposedly from a holden car.

[nonnieselman]

What year car is this? and what 90mm TB you have?

[TJWells]

The car is an 02 zo6 with an ls7. pcm is an 04 p59 for flex fuel option. I'm hoping to run e85 to cover the 12:1 compression. I do not have flex fuel on yet. I have switched pins on the harness for the p59. TB is from an ls7, don't remember what year I looked it up for but definitely a gold blade.

[TJWells]

I have it set to .0192, I found that on this forum supposedly from a holden car.

BTW is .0157 for a 102mm TB?

[nonnieselman]

Does it only set P1516 at WOT?

[TJWells]

It seems yes, but I also moved it pretty fast. I did run across a parameter for the speed of it opening to be maxxed out to 4 g/sec. I gotta spend time with it doing some trial and error, that will be Friday's goal.

[nonnieselman]

Just for fun..
B2702 Set to 90%

[TJWells]

I will, I just want to see if I actually get to WOT at 90%. Thanks for all your help so far. I do appreciate it!

[nonnieselman]

The idea behind that is the TB will over rotate past 100% and throws P1516.
Setting it to 90% in that table lets it go to 100% instead of over rotating.

[TJWells]

I believe that's exactly whats happening. I just want to do a visual to see what the TB looks likes when the pedal is fully depressed. I did run across this in the forum somewhere. I want to sum this all up when I get it right, and post it in here. As well as for a 102mm TB. Still doesn't explain why my IAC numbers won't log for RAFIG. Did you ever get the log to open? I can try to do another and send it.
Also I do not see a way to adjust my TB per the RAFIG tutorial. It seems my IAC counts are too high 310 I think. How do I get them down without drilling a hole in the blade? This 90 mm should be able to let in enough air without a hole in it.

[nonnieselman]

I believe that's exactly whats happening. I just want to do a visual to see what the TB looks likes when the pedal is fully depressed. I did run across this in the forum somewhere. I want to sum this all up when I get it right, and post it in here. As well as for a 102mm TB. Still doesn't explain why my IAC numbers won't log for RAFIG. Did you ever get the log to open? I can try to do another and send it.
Also I do not see a way to adjust my TB per the RAFIG tutorial. It seems my IAC counts are too high 310 I think. How do I get them down without drilling a hole in the blade? This 90 mm should be able to let in enough air without a hole in it.


Your not going to have IAC numbers period. Thats for a cable throttle body with IAC. You have an electric TB so thats not gonna work.

I havent tried to open it on my new laptop. Ill give that a try tomorrow.
Again IAC is only for Cable Throttle body with an IAC on the side of it. So remove that from your PID list.
YOur going to want to log Accelerator Pedal and TPS.

[TJWells]

Setting B2702 to 90% did the trick for getting rid of my p1516 code. And I verified that It does open fully. I just keep thinking there's a better way to scale the TPS so you can set B2702 to 100%.
RAFIG is next up.

[nonnieselman]

Nope. There are tables we cant see or get to and adjust behind the scenes on these stock PCMs. So have to fudge the numbers to make it work.