I can't seem to lean her out.

[superls1]

foff667 has given you some good advice. Remember, on the VE table a bigger number = more fuel and a smaller number = less fuel

[02Z0h6]

foff667 has given you some good advice. Remember, on the VE table a bigger number = more fuel and a smaller number = less fuel

I think I'm having the same issue with my car and suspect my ve may very well be off. My question is if LosLs2 or I do reduce the ve in that cell and the cell goes positive (assuming it's slightly negative right now) won't it dump extra fuel in thinking the car is now lean?

[WS6FirebirdTA00]

I think I'm having the same issue with my car and suspect my ve may very well be off. My question is if LosLs2 or I do reduce the ve in that cell and the cell goes positive (assuming it's slightly negative right now) won't it dump extra fuel in thinking the car is now lean?

are you talking about the fuel trims? fuel trims are not in use at WOT unless they are locked at a point leading up to WOT

[02Z0h6]

are you talking about the fuel trims? fuel trims are not in use at WOT unless they are locked at a point leading up to WOT

I'm just trying to get back into tuning my car as it's been sitting since september and I haven't looked at hpt since then. So bear with me...
What I was trying to say was that: LosLs2 asked if reducing his ve table would lean out afr? I was under the impression that you wanted all your ltft's to be 0 to -4 so that when you go wot the pcm would not add fuel. If LosLs2 subtracts from his ve table wouldn't that aggravate the rich condition? Now his ltft which was 0 for instance is now +3 (for example) and if he goes wot from that +3 cell the pcm will compensate by adding fuel.
I have the same issue at around 2500-4500rpm (11.9-12.2), I couldn't lean the car out no matter how much I reduced pe. I think my ve table is off in those areas. From 5k to 6400rpm it was between 12.6 and 13.0afr which was fine.
If I'm way off base please let me know, I will be needing a lot of help in the coming months. Thanks.

[EC_Tune]

Ideally you do want the LTFT's to be 0 to -4 especially when you add load (higher MAP).
Your issue from 2500-4000 may be VE table, MAF, or PE fuel related. What are you commanding for AFR in PE fuel EQ Ratio? Should be about ~1.13 for a 13.0 AFR depending on your Stoch value (Usually 14.6x).

EC

[02Z0h6]

Ideally you do want the LTFT's to be 0 to -4 especially when you add load (higher MAP).
Your issue from 2500-4000 may be VE table, MAF, or PE fuel related. What are you commanding for AFR in PE fuel EQ Ratio? Should be about ~1.13 for a 13.0 AFR depending on your Stoch value (Usually 14.6x).

EC

I actually set the pe to 1.18 which is about 12.45 in those areas because no matter how much I'd drop it it would have no effect, so I just left it at 1.18. Car also starts to pull timing (between 1-4*) in 4rth gear at wot from about 3400 to 4500 (as fast as I was willing to go). If I go wot in 2nd or 3rd from 3500rpm it doesn't pull any timing. Not really sure what's going on but I'd like to get to the bottom of it this season.

[LosLS2]

I'm just trying to get back into tuning my car as it's been sitting since september and I haven't looked at hpt since then. So bear with me...
What I was trying to say was that: LosLs2 asked if reducing his ve table would lean out afr? I was under the impression that you wanted all your ltft's to be 0 to -4 so that when you go wot the pcm would not add fuel. If LosLs2 subtracts from his ve table wouldn't that aggravate the rich condition? Now his ltft which was 0 for instance is now +3 (for example) and if he goes wot from that +3 cell the pcm will compensate by adding fuel.
I have the same issue at around 2500-4500rpm (11.9-12.2), I couldn't lean the car out no matter how much I reduced pe. I think my ve table is off in those areas. From 5k to 6400rpm it was between 12.6 and 13.0afr which was fine.
If I'm way off base please let me know, I will be needing a lot of help in the coming months. Thanks.

I could not have said it better myself. That is why I kept adding to the VE Table is because I kept seeing 1's in the cells that I was hitting during WOT. As stated above, all my reading indicated that these cells MUST be below zero or else the computer would add fuel in order to correct and therefore throw off the PE table. To recap, I am running the new 2 bar SD for the 98 PCM. No MAF at all. OLFA is set to 1.13 across the board I believe.

[LosLS2]

I backed off my VE values and hope to throw the new tune in the car tomorrow to see if it reacts to the lower VE values by leaning me out a bit.

[02Z0h6]

I backed off my VE values and hope to throw the new tune in the car tomorrow to see if it reacts to the lower VE values by leaning me out a bit.

I hope everything works out for ya bro. I'll keep an eye on this thread to see how you make out.

[EC_Tune]

I could not have said it better myself. That is why I kept adding to the VE Table is because I kept seeing 1's in the cells that I was hitting during WOT. As stated above, all my reading indicated that these cells MUST be below zero or else the computer would add fuel in order to correct and therefore throw off the PE table. To recap, I am running the new 2 bar SD for the 98 PCM. No MAF at all. OLFA is set to 1.13 across the board I believe.

The +1's you are seeing are in the LTFT Histogram?

If so, you have a few cells that are going positive just before you go WOT. If you keep adjusting WOT by the +1 in the LTFT Histogram but have not fixed the area leading up to WOT you will continue to get +1's at WOT. Don't use those values to adjust the 85-105 Kpa range (unless the Fuel Trim Enable bit is set in that area - add it to the status bits & watch it like a hawk!)

At higher load (in 60-80 Kpa range (not at idle)) you should see -1 to -4 in the LTFT cells there. If you have positve LTFT's going into WOT that will add fuel to WOT as well.

EC

[LosLS2]

OK guys. I think I got it right now. My Commanded AFR (PE Table) is pretty damn close to actuall (on the LM-1)after I lowered my VE Table. Here is the latest tune that is in the car and the last log. It feels VERY strong. The ET Street Drag Radials boil every time that I stab it in second gear over 3500RPM. Many thanks to Foff.

EC, can you explain what you said in your last post again but this time use more specific, dumbed down language. I am not sure where what you want me to watch is located in the scanner. I do believe that the condition that you described, has been my problem in seeing those +1's in the VE table. I saw them again towards the end of my logging but then switched over to the KR histo and saw some knock in that same area and just figured that that was where it was coming from. I backed the timing off a little in those areas (made sense that there was KR there as the cells were out of wack with the surrounding cells in my spark table).

Unfortunately, I now have to give back the WBO2.

[LosLS2]

Whoops, forgot to post the files. Here you go for your viewing pleasure. The way negative cells in the VE table in the low RPM's are just gonna have to stay that way. The WB02 says that they are right and the car doesn't buck there anymore.

[Bill@HPTuners]