l2r99gst

iTrader: (2)

My original suggestions about the ISCV values and tables was assuming that your fuel trims were already in check.

It sounds like your fuel trims may be maxing out. Make sure to log your LTFT Lo and LTFT Mid, as well as STFT.

Jack_of_Trades

iTrader: (17)

You still need to get your fuel trims closer to 0 first. You're certain the ECU is going into closed loop??? Thats an insane amount of fuel going into your car so something is definitely up. Put a catch can on the end of your exhaust tip so maybe you can recover some of this raw fuel pouring out of the exhaust,lol.

Logically there is only two factors that would make this additional fuel happen in closed loop, in my opinion:

• The ECU thinks there is WAYYY more air going into the engine than there really is.
  
• The ECU thinks there is a MUCH smaller fuel injector installed than there really is.

After the ECU sees that the closed loop settings are pegged fuel rich or fuel lean for so long, the ECU will consider the NB O2 sensor to be faulty and switch to the open loop tables. Thats why I asked if you are certain its in closed loop during most of these issues.

RedLanEVO

iTrader: (16)

My fuel trims were in check. They were +5% before I changed any of the scalings.

RedLanEVO

iTrader: (16)

I'm sure it's in closed loop fuel control. I checked with the scan tool.

Jack_of_Trades

iTrader: (17)

Well, your fuel trims should be pegged in the negatives trying to fix your overly rich condition so there is something wrong there. Also, you need the car to idle for over 20 minutes before the ECU will adjust your fuel trims and with your issue...thats a whole lot of gas and you could be flooding the cylinder walls too so be careful.

RedLanEVO

iTrader: (16)

Damn it, I had it at a perfect idle then this happens. I don't know what's going on now. Either I did something wrong or I've got faulty injectors.

Jack_of_Trades

iTrader: (17)

Or much bigger injectors than you thought you were getting perhaps? Are they stamped??? I'd keep going up on the injector scaling until it smooths out at idle, just to see what value it takes to get you back on track with just the idle richness.

RedLanEVO

iTrader: (16)

I think I found what's going on. Here are the maf scalings.

load units
192
256
512
768
1024
1280
1536
1792
2048
2304
2560
2816
3072
4096
5120
6144
8192
10240
12288
14336
16384


g/s
228.211
239.496
259.559
274.605
285.891
293.414
299.684
307.207
310.969
314.73
319.746
319.746
319.746
319.746
319.746
319.746
319.746
319.746
319.746
319.746
319.746

Last time I checked, they were not that high! I don't know what happened as I haven't touched them since I changed them to the HKS RS scalings. You think this might have something to do with richness?

Last time I checked, they were

g/s
181.816
190.594
206.895
219.434
228.211
234.48
239.496
244.512
248.273
250.781
254.543
258.305
260.812
272.098
278.367
283.383
292.16
295.922
297.176
294.668
290.906

Jack_of_Trades

iTrader: (17)

Yeah definitely put them back to stock for now and see how she runs. Personally, if you aren't going to test and tune the MAF scaling using datalogging and your actual fuel trims, leave it stock for now.

RazorLab

iTrader: (8)

Are you using the old style buschur intake that bolts straight to the MAF or the new style that uses and adapter that bolts to the MAF?

The old style needs no changes to the MAF scaling. It works fine bolting straight on.

However, if you also have the buschur hard intake pipe and not stock, then all bets are off.

I personally wouldn't use the HKS RS scaling as that will throw everything off as well. The HKS intake screws with the MAF big time and the old style BR filter does not.

Which injectors are these?

I also take it you are seeing the 02 voltage swing correctly right? You plugged back in the 02 sensor harness after you installed the cams right?

RedLanEVO

iTrader: (16)

I plugged in everything after installing the engine. I do have the Buschur hardpipe. Right now, I got it to idle ok. It turned out that my intercooler pipe blew off to make it run really rich. Anyways, I already changed the maf scaling back to stock. It idles ok now but when I'm on the gas, even just a little bit, AFR's swing very lean where my wideband isn't able to read anymore and the engine hesitates. What do I need to do to fix this? Adjust latency voltage for the injectors? But I already had my injectors dialed in by a local tuner. What else? It's frustrating me. I've already scheduled Friday for a drivability tune at one of the local tuner's shop but until then, I can try to make it work so I won't have to go. Help? LOL

RazorLab

iTrader: (8)

Have you logged the fuel trims how it currently sits?

RedLanEVO

iTrader: (16)

No I haven't.

RazorLab

iTrader: (8)

It would be a good start to figuring it out.

I have my money on the injector scaling/latencies.

RedLanEVO

iTrader: (16)

Yeah it would but I don't know how to and I don't understand any of the write-ups I've read on this forum. It needs to be in "retard" language for me. LOL

Although I did take a look at my scan tool, the long term was -21% and the short terms hovered around -7 to -12%. This was at cruising speeds. What should do? Up latencies or something else?