Placebo
Full Member
Karma: +3/-0
 Offline
Posts: 108
|
 |
« Reply #15 on: June 14, 2015, 02:22:39 PM »
|
|
|
understood, %tuning is bad. bad Placebo  really was going to fine tune later on, it was the first time I modified a map myself and was mostly playing and praying that I knew enough to make a map change, checksum and flash without total disaster. I put a fuel pressure gauge inline near my fuel pump and read about 55 psi. I put it near pump because that's where I been using a check valve and was easy fast swap, seems close to 4 bar (58 psi), I reckon close enough for cheap gauge? Good to know I should be thinking about modifying for fuel enrichment; was only considering tweaking timing. |
|
|
|
« Last Edit: June 14, 2015, 03:37:11 PM by Placebo »
|
Logged
|
|
|
|
|
tjwasiak
|
|
« Reply #16 on: June 14, 2015, 04:31:37 PM »
|
|
|
Is it under reading 55 psi under full boost? It should read 58 psi (as set by regulator) + your boost pressure (was it 16 psi?) - so 74 psi, 70 would not be bad. I would check voltage at fuel pump at WOT at around 5000-5500 RPM (I suggest you should ask someone to help you taking those measurements).
|
|
|
|
|
Logged
|
|
|
|
Placebo
Full Member
Karma: +3/-0
Offline
Posts: 108
|
|
« Reply #17 on: June 14, 2015, 04:37:06 PM »
|
|
|
Yeah, definitely gonna need help if I have to read at full boost, this was idle.
|
|
|
|
|
Logged
|
|
|
|
|
tjwasiak
|
|
« Reply #18 on: June 14, 2015, 05:20:46 PM »
|
|
|
At idle it should read 58 psi - gauge pressure in your intake manifold, so 55 psi is quite high value (you should be running higher vacuum at not loaded idle with warm engine).
EDIT: BTW you can always ask at the forum if the changes you made to your file seems good enough to flash and log.
|
|
|
|
|
Logged
|
|
|
|
Placebo
Full Member
Karma: +3/-0
Offline
Posts: 108
|
|
« Reply #19 on: June 16, 2015, 06:21:58 AM »
|
|
|
I disconnected the Vacuum form the FPR and tapped the gauge into a spot near the fuel rail, reads 59 psi so I reckon the is working.
All the sudden my AC clutch or compressor is making a bad bearing sound so gonna take a break from tuning until I get the this, my fuel pump voltage logged, and a new vacuum leak resolved.
Don't want to muddle up an excellent tuning forum with mechanical repairs.
I really appreciate the help and will be back once the car is ready for tuning.
|
|
|
|
|
Logged
|
|
|
|
Placebo
Full Member
Karma: +3/-0
Offline
Posts: 108
|
|
« Reply #20 on: June 27, 2015, 10:59:50 AM »
|
|
|
Hi All,
After long delay fixing an idler pulley, I am back. Put a hold on tuning and reverted to stock to be sure everything is okay before tuning. I installed an Innovate LC-2 wideband A/F gauge and took some logs for the stock ECU; see attached table and plots below. As you can see in the vagcom log, I have significant timing correction even with stock ECU. The plot of the wideband looks okay so it is not due to running lean? Can't figure out why I get so much timing retard with stock settings.
Any help you can provide is appreciated.
|
|
|
|
« Last Edit: June 27, 2015, 11:04:26 AM by Placebo »
|
Logged
|
|
|
|
|
eliotroyano
|
|
« Reply #21 on: June 27, 2015, 12:34:45 PM »
|
|
|
Hi All,
After long delay fixing an idler pulley, I am back. Put a hold on tuning and reverted to stock to be sure everything is okay before tuning. I installed an Innovate LC-2 wideband A/F gauge and took some logs for the stock ECU; see attached table and plots below. As you can see in the vagcom log, I have significant timing correction even with stock ECU. The plot of the wideband looks okay so it is not due to running lean? Can't figure out why I get so much timing retard with stock settings.
Any help you can provide is appreciated.
How are your IATs? Timing Retard is a little high but AFRs seems to be around 11.5-11:1, that I think are enough for that LOADs. |
|
|
|
|
Logged
|
|
|
|
Placebo
Full Member
Karma: +3/-0
Offline
Posts: 108
|
|
« Reply #22 on: June 27, 2015, 02:44:15 PM »
|
|
|
Did a carpool errand and logged . Outside is 30 deg. C, logged and was about low 50s cruising and up to max of 63C in a half-assed 3rd gear pull with some timing correction of about 4 degrees. IAT Seem okay?, not sure what spec should be.
Thanks for the suggestion.
|
|
|
|
|
Logged
|
|
|
|
Placebo
Full Member
Karma: +3/-0
Offline
Posts: 108
|
|
« Reply #23 on: June 27, 2015, 07:17:26 PM »
|
|
|
Thanks Karma! You were right. Logged the IAT and was 30 degrees above ambient. Pulled it out and cleaned the varnish off and the temps dropped 20 degrees. A few quick logs and knock correction is at a max of 2.2 instead of 4+. Onwards now to tuning  |
|
|
|
|
Logged
|
|
|
|
Placebo
Full Member
Karma: +3/-0
Offline
Posts: 108
|
|
« Reply #24 on: June 29, 2015, 07:44:34 AM »
|
|
|
 , Appears I had a very serious case of wishful thinking. Put back in my chipped ECU and IAT temps went back up to 63+ deg C after a few (4) very spirited log runs. Also had significant (9+) timing retard so I swapped back to my stock ECU for safety. Don't know what to think. I have swapped out to a colder and gapped plugs, air to fuel ratios look good (to my untrained eye) and checked fuel pressures are good; all to no avail. Perhaps I am limited by living in TX with hot summers and I get some serious heat soak. Not too sure about this as I think I was getting the same amount of retard over the winter too. Since I am at a loss for what else to try, I filled up at a different gas station today, added some seafoam and tonight I will clean and flush out my intercooler with the hope it makes some difference. Will be back if anything changes.
|
|
|
|
|
Logged
|
|
|
|
|
eliotroyano
|
|
« Reply #25 on: June 29, 2015, 10:49:18 AM »
|
|
|
, Appears I had a very serious case of wishful thinking. Put back in my chipped ECU and IAT temps went back up to 63+ deg C after a few (4) very spirited log runs. Also had significant (9+) timing retard so I swapped back to my stock ECU for safety. Don't know what to think. I have swapped out to a colder and gapped plugs, air to fuel ratios look good (to my untrained eye) and checked fuel pressures are good; all to no avail. Perhaps I am limited by living in TX with hot summers and I get some serious heat soak. Not too sure about this as I think I was getting the same amount of retard over the winter too. Since I am at a loss for what else to try, I filled up at a different gas station today, added some seafoam and tonight I will clean and flush out my intercooler with the hope it makes some difference. Will be back if anything changes. Are you using stock SMIC?  because with outside or ambient temps of 30°C, IATs of 63°C could be common. Here is the ignition timing vs IAT correction factor for my M383 ECU. M592 ones should have something similar. You can see that some ignition timing retard is programmed due to IATs. I wish I had some old logs to compare it. Where I live is common to have 30°C-32°C during midday. I can suggest to log AFR during the pulls when ECU takes out ignition timing your are seeing. |
|
|
|
« Last Edit: June 29, 2015, 10:52:56 AM by eliotroyano »
|
Logged
|
|
|
|
Placebo
Full Member
Karma: +3/-0
Offline
Posts: 108
|
|
« Reply #26 on: June 29, 2015, 12:37:45 PM »
|
|
|
Oh yeah, you are on to something here for this NEWB! Thanks for the info
Looked up the M5.9.2 map, see attached. For a recent IAT log I had a max correction of -4.5 at 5400 rpm for an IAT of 53 C. So some of this high rpm correction must be from my map but the remaining correction coming from somewhere else? Must be some rules when this map is applied and when not, maybe only at WOT? Are values in this map additive with values detected by the knock sensors? I know my temps go into the 60s but maybe not at WOT.
|
|
|
|
|
Logged
|
|
|
|
|
eliotroyano
|
|
« Reply #27 on: June 29, 2015, 12:52:58 PM »
|
|
|
Oh yeah, you are on to something here for this NEWB! Thanks for the info
Looked up the M5.9.2 map, see attached. For a recent IAT log I had a max correction of -4.5 at 5400 rpm for an IAT of 53 C. So some of this high rpm correction must be from my map but the remaining correction coming from somewhere else? Must be some rules when this map is applied and when not, maybe only at WOT? Are values in this map additive with values detected by the knock sensors? I know my temps go into the 60s but maybe not at WOT.
From my readings and research I have the understanding (I really need to make this in IDA to go deeper ) that this correction map (same as I show you before) are fixed and applyied directly to base ignition map. To that result applyies actual controls by knock sensors (that is ignition retard by knock you see in your logs) giving you the final applyied ignition timing you are seeing again in your logs. Take in account that under normal engine operation, ECU try by default to use as much ignition timing as possible, of course up to a practical limit. |
|
|
|
|
Logged
|
|
|
|
Placebo
Full Member
Karma: +3/-0
Offline
Posts: 108
|
|
« Reply #28 on: June 29, 2015, 01:15:52 PM »
|
|
|
If I understand you correctly, the logged knock sensor CFs then have nothing to do with these map CFs. They are applied independently to the timing being run by the engine. If so, then the experience of seeing knock when hot out is due to these map CFs being inadequate?
|
|
|
|
|
Logged
|
|
|
|
|
eliotroyano
|
|
« Reply #29 on: June 29, 2015, 01:23:23 PM »
|
|
|
If I understand you correctly, the logged knock sensor CFs then have nothing to do with these map CFs. They are applied independently to the timing being run by the engine. If so, then the experience of seeing knock when hot out is due to these map CFs being inadequate?
I wouldn't say that those CFs maps are inadequate, just serve as precaution and allows faster adaptation for general engine operation conditions. I would log LOAD, IAT, AFR, Timing + Timing CFs to know how is engine working and do a better documented comment about how is your engine working. If you car is 100% ok, hot climate, heatsoak, slow car movement, poor ventilation and small intercooler can generate some good timing CFs. |
|
|
|
« Last Edit: June 29, 2015, 01:34:11 PM by eliotroyano »
|
Logged
|
|
|
|
|
