Data Logs! Post them here.

[username404]

Just ordered new from GrimmSpeed for head gasket and up pipe gasket.

[username404]

Hoping that I don't have to touch BPB after the gaskets.

[Wayno]

Vacuum leak is what you should look at first, not exhaust. Only pull the blocks out if they're the cause of the leak, they will be a bitch to get back in for a novice. Most likely a hose as Steve said. Pcv is the best bet. Why would you flash and wipe your reference point when you have a hardware issue?

[username404]

I can reflash and log again tomorrow see if there is any changes and upload the log. I really don't want to reinstall the BPB.

[steve99]

Originally Posted by username404

I can reflash and log again tomorrow see if there is any changes and upload the log. I really don't want to reinstall the BPB.

no need to reflsh the ecu constantly learns.

of you just want to reset ecu to clear codes jist remove battery terminal then press brake to bleed of any residual power and reconnect battery.

[username404]

Originally Posted by steve99

no need to reflsh the ecu constantly learns.

of you just want to reset ecu to clear codes jist remove battery terminal then press brake to bleed of any residual power and reconnect battery.

Alright I'll it tomorrow. Thanks!

[username404]

Could this be a reason why the gas mileage is also being terrible. 90% traffic in the city and avg is 20-21?

[steve99]

Originally Posted by username404

Could this be a reason why the gas mileage is also being terrible. 90% traffic in the city and avg is 20-21?

could be.

if you have exhaust leak near or before o2 sensors the sensor will see some fresh air which contains far more oxygen than the exhaust gasses, the sensor then signals a lean condition to the ecu, so the ecu adds more fuel trying to correct thge perceived lean condition.

but these cars like most get crap fuel economy in traffic compared to open road or highway

[solidONE]

I didn't want to crowd up wayno's "Maximum Effect" thread with any more of my logs and junk so I figure I unload my logs and junk here. lol

I've reloaded my 91 octane rom where I've not tried to address the lean spot at 2260rpm's that was seen in my E85 rom which is loaded with the same cam timing tables. I was actually not aware that there was such a scary looking lean spot until I finally started to mess with the load limits while I as dialing the MAF scale on the E85 rom. I don't think I've ever taken logs going WOT below 2000rpm until a week ago.

http://datazap.me/u/solidone/plm3-ca...1698&mark=1572

16.19:1 AFR!!! a little bit of FLKC only toward the down slope of the spike. I did log the cam timing instead of fuel trims since I already know it will be higher than normal due to it being the first tank of petrol after running E85. LTFT settled around +6~8% after it had some time to learn. So it does look like that spike in afr happens right as the intake cam advance come up to and over 35* while the exhaust cam retard come up toward 30* then the afr just kind of smoothly rest back down to around commanded afr.

Any suggestions what to adjust? Should I just back off the cam timing right off the bat first without other adjustments, or bring the load limit up in that area first before touching the cam timing? Is there any other table that I might adjust to bring down the AFR that I haven't touched such as the load compensation table (i've no clue how to make adjustments on load compensations)? @jvincent any input or suggestions?

Load limit table is set to the top one on this rom:

[Kodename47]

It's going lean due to the load limiters, if you raise the load limits but want to keep target fuel and timing the same then just copy the 1.0 or 1.1 load values across in the respective tables. That way you might get the fueling from the MAF without the daft drop in AFR target and timing that the stock tables have.

[jvincent]

@Kodename47, could you explain why the load limits would be causing it to go lean?

If I understand what you are suggesting, you want him to lower the load limits compared to what he is using now (top table), which I thought would cause it to go lean, or were you talking about load limits in a different table?

[NotSoJDM]

This thread would be awesome to have formatted like the "wheel directory" thread!

A nice searchable matrix on the first page for those looking for logs of specific setups.

[Kodename47]

Originally Posted by jvincent

@Kodename47, could you explain why the load limits would be causing it to go lean?

If I understand what you are suggesting, you want him to lower the load limits compared to what he is using now (top table), which I thought would cause it to go lean, or were you talking about load limits in a different table?

I'm suggesting the opposite. In the load limit tables he posted, he is exceeding the load values by some margin. The ECU caps fueling at the load limit but if the intake of air increases the result is that it just goes very lean.

The ECU isn't just using the load for table axis look up, it's what it uses for fueling and is calculated from the MAF values. The limits are applied to stop it going too rich. If you have lean spikes then the limits are too low. This shouldn't be a problem NA but if you start changing the MAF scale, it skews the load calculations and then you can start generating these issues.

[jvincent]

Thanks for the clarification.

What you just said above was how I thought it worked, but the way I read your original comment it sounded like you wanted him to decrease the load limits.