RomRaider

I have replaced my 02 WRX short block with an STI block. I get hesitation between 2K and 3K RPM, light acceleration(no boost. loads less than .9g/s), and only in 1st or 2nd gear. Timing is dropping 15-20 degrees temporairly. No recorded knock, no dips/spikes in AFR, no CL/OL issues, and my advance knock table is set to 5 degrees(but recorded knock correction never dips either). Merch sent me some test defs to try out a year or so ago, but nothing ever came of those becasue nothing could be found.

my question is, is the logged value of total ignition timing* the "target" timing, or is the actual "feedback" timing that the car used?

If it is the "target", then I may have a map/ecu issue, if it is the "feedback", then I have a mechanical/electrical issue.

I may replace my crank sensor and see if it helps, or should I replace the cam sensor? Before the swap, it would happen during constant throttle crusing. I am still breaking in the motor, so I do not know if this will happen during a WOT pull, or constant throttle crusing info just yet.

I'm stumped on this one. I'd post a map, but it is your basic 02 map that has 6 degrees pulled across the board and CL target AFR of 14.8. The car does not go into OL because I never exceed the requirments for the switch to the OL fuel map.

Thanks
Wheeler

When you log total timing, that is what the ECU has determined it wants to run.

As above - total timing is the timing the ECU wants to run after all compensations have been applied.

Can you post the latest 3rd gear and 4th gear logs as well as your current ROM?

Here is a log. I cut out some of the data. you will notice the issue in lines
47
230
270
283

the 3rd and 4th gear stuff is in there, even 5th. I don't log gear position on a regular basis.

Just to clarify, If I get a 20 degree pull as detemined by the total timing, this is because the ECU "wants" to do this, for whatever reason. Now I just have to find this reason

I have not been able to determine just yet if it always happend in the same place with respect to RPM and load sites. I need more data, but I really need to figure out how to sort through it quickly, it sucks going line by line and highlighting where it happens.

I just found a map for an 06 WRX...comparing it to mine, it has a boat load of more timing...maybe I need to add more. But the map has AVCS in it, so maybe it is not exactly compairable...

You've changed quite a bit with your tune. To rule out something unusual, I would try flashing a very conservative map (start with a stock map DL) with the minimal changes from stock necessary for it to run (safely) -> injector scaling, latency, maf scaling (if non-stock intake), conservative timing and fuel and zero out max wgdc. Then see if the same thing happens.

I flashed it back to the 2.0l stock map, leaned out the CL target to 14.7 and dropped the timing 3 degrees across the board. The car ran slightly smoother and really well for about 20 minutes. I noticed it would still pull timing 15-20 degrees, but I could not feel it like before. I think this is becasue it was either not really happening, or the power was down so enough I could not feel it anymore. 20 minutes into it, it started to FLKC like crazy. Anyway, the issue is still there.

This pulled timing only shows up in the "total" timing, but is not reflected in the base, advance, FLKC, FBKC, etc. At one point, it pulled 20 degrees for 1 second, gave it back, and then pulled it again 3-4 seconds later. very strange.

If I was going to replace a sensor, which one should it be? The crank sensor, or the cam sensor, or neither?

do you have the old logs where I had you log with the custom defs?

I'm sure I do, but have thousands of logs..and no good way of finding it. The same goes for the defs. too. If you want me to try again, let me know. From what I remember, all of the test parameters you wanted me to run never changed.

Did you actually log with the near stock map to make sure it was still pulling timing - I couldn't tell from your post -> it sounded like you didn't. Can you post up the near stock map that you used?

I did switch the map, and it did pull timing. here is the stoclk with the previous mentioned mods. I also copied over my MAF table too. I still have the stock intake, so the changes are not that drastic.

time stamp 157406,181125,263109,269265

The log is short becasue I got tired of looking at all the FLKC. I pulled over and swiched up some things, but the result was still the same. I'm not to terribly worried about it, but something is indeed going on, and I have found a few others with the same issue. If it betters the group to do more digging, I can try and help, but I think I will just have to deal with it.

I did put TGV deletes in when I put the motor back together, but I would expect any sort of flow obnormailty in air or fuel it may have created to show up in an AFR or something.

I decided to do a high speed log with minimal parameters. No matter how fast I go, these drops only show up for one time stamp, no consecutive time stamps.

try logging the idle switch along with minimal parameters

Did you ever figure this out? Having a similar issue with my car, also happens to be a hybrid...