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coryf1233

coryf1233

15+ Year Contributor
246
0
Nov 6, 2007
hanover, Pennsylvania
I had a full log but for whatever reason it only save up until around 2500 rpms..


heres what i got


Rpm:2593
Knock:0
inj p/w: 13.59ms
coolant temp. 189 deg
o2 trim: 100%
fuel trim hi:127%
Fuel trim mid: 114%
fuel trim low:139%



I just had my base timing set a +5degrees the other month and now on this log at this rpm it read 30 degrees..what could be causing this.
 
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I'd be more worried about trying to figure out why your low fuel trim is reading 139%. This could indicate a boost leak. When your at idle boost leaks turn into vacuum leaks therefore sucking in air as opposed to leaking air. This would mean that the ECU is seeing less air than is really getting to the engine making it run lean during idle and cruise and run rich while in boost. This in turn will make the ECU add fuel to the trims to get it back to a stoich mixture.

I would do a boost leak test.

As for your timing. Setting the base timing to 5* only makes sure CAS adjustment is calibrated to the ECU correctly. The ECU assumes that the Physical ignition timing is 5* BTDC, if the base timing is off and actually @ 3* the ECU does not know this and will continue to read it as 5*. Therefore you will be 2* retarded on all of your readings. After the Base timing is set, the ECU then has full control of the timing adjustment and will most likely never be as low as 5*.

A lot of guys actually lower the base timing so that they can get away with running high boost on injectors they can't properly control with a SAFC. Since the more correction you put into the SAFC the more timing you get which increases your likelyhood of getting some knock. Pull a couple degrees of base timing and your WOT will be golden. But the trade off is that it will be doggy down low.
 
Upvote0
coryf1233 said:
just did another log

rpm:5218
knock: 0
Timing 45 degrees?????
inj p/w 1.25ms
02 trim:100
fuel trim hi: 127
fuel mid 114
fuel low 139
wideband 02" 15.37
Click to expand...

We need more data than this... Looks like this is when you let off the throttle. 1.25ms of IPW is normal for idle. and if you are decelerating 45* of timing is normal also. We need a full log from 2500rpm to redline with all the information for every RPM point of the log.

Kind of like this: (BTW, look at my timing at 6200 rpm 45* Oh Noes!! But look at my TPS, I had just let off of it. You are really only concerned about what the timing is under boost @100% WOT.)

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  <td height=17 class=xl2915076 style='height:12.75pt;border-top:none' x:num>194.14</td>
  <td class=xl2515076 style='border-top:none;border-left:none' x:num>4125</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>98.44</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>89.84</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>102.34</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>16.64</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0.88</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>100</td>
  <td class=xl3015076 style='border-top:none;border-left:none' x:num>15</td>
 </tr>
 <tr height=17 style='height:12.75pt'>
  <td height=17 class=xl2915076 style='height:12.75pt;border-top:none' x:num>194.53</td>
  <td class=xl2515076 style='border-top:none;border-left:none' x:num>4468.75</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>98.44</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>89.84</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>102.34</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>17.92</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0.88</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>100</td>
  <td class=xl3015076 style='border-top:none;border-left:none' x:num>15</td>
 </tr>
 <tr height=17 style='height:12.75pt'>
  <td height=17 class=xl2915076 style='height:12.75pt;border-top:none' x:num>194.95</td>
  <td class=xl2515076 style='border-top:none;border-left:none' x:num>4625</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>98.44</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>89.84</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>102.34</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>18.18</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0.86</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>100</td>
  <td class=xl3015076 style='border-top:none;border-left:none' x:num>16</td>
 </tr>
 <tr height=17 style='height:12.75pt'>
  <td height=17 class=xl2915076 style='height:12.75pt;border-top:none' x:num>195.38</td>
  <td class=xl2515076 style='border-top:none;border-left:none' x:num>4843.75</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>98.44</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>89.84</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>102.34</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>18.18</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0.86</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>100</td>
  <td class=xl3015076 style='border-top:none;border-left:none' x:num>16</td>
 </tr>
 <tr height=17 style='height:12.75pt'>
  <td height=17 class=xl2915076 style='height:12.75pt;border-top:none' x:num>195.8</td>
  <td class=xl2515076 style='border-top:none;border-left:none' x:num>5125</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>98.44</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>89.84</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>102.34</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>18.18</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>1</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0.86</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>100</td>
  <td class=xl3015076 style='border-top:none;border-left:none' x:num>16</td>
 </tr>
 <tr height=17 style='height:12.75pt'>
  <td height=17 class=xl2915076 style='height:12.75pt;border-top:none' x:num>196.23</td>
  <td class=xl2515076 style='border-top:none;border-left:none' x:num>5437.5</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>98.44</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>89.84</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>102.34</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>17.66</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0.86</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>100</td>
  <td class=xl3015076 style='border-top:none;border-left:none' x:num>17</td>
 </tr>
 <tr height=17 style='height:12.75pt'>
  <td height=17 class=xl2915076 style='height:12.75pt;border-top:none' x:num>196.66</td>
  <td class=xl2515076 style='border-top:none;border-left:none' x:num>5531.25</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>98.44</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>89.84</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>102.34</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>17.15</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0.86</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>100</td>
  <td class=xl3015076 style='border-top:none;border-left:none' x:num>18</td>
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 <tr height=17 style='height:12.75pt'>
  <td height=17 class=xl2915076 style='height:12.75pt;border-top:none' x:num>197.06</td>
  <td class=xl2515076 style='border-top:none;border-left:none' x:num>5781.25</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>98.44</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>89.84</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>102.34</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>16.64</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0.86</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>100</td>
  <td class=xl3015076 style='border-top:none;border-left:none' x:num>18</td>
 </tr>
 <tr height=17 style='height:12.75pt'>
  <td height=17 class=xl2915076 style='height:12.75pt;border-top:none' x:num>197.45</td>
  <td class=xl2515076 style='border-top:none;border-left:none' x:num>5937.5</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>98.44</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>89.84</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>102.34</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>16.38</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>0.86</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>100</td>
  <td class=xl3015076 style='border-top:none;border-left:none' x:num>18</td>
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 <tr height=17 style='height:12.75pt'>
  <td height=17 class=xl2915076 style='height:12.75pt;border-top:none' x:num>197.81</td>
  <td class=xl2515076 style='border-top:none;border-left:none' x:num>6062.5</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>98.44</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>89.84</td>
  <td class=xl2415076 style='border-top:none;border-left:none' x:num>102.34</td>
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  <td class=xl2415076 style='border-top:none;border-left:none' x:num>100</td>
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  <td class=xl3315076 style='border-top:none;border-left:none' x:num>98.44</td>
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One RPM point tells us nothing about what's going on.
 
Upvote0
rpm:1375
knock :0
timing: 26 deg
inj pw/ 4.62
o2 trim: 115%
fuel trim high: 127 %
fuel trim mid :114
feul trim low:139
wb 02 15.72


Rpm:3000
knock :0
Timing: 35 deg
inj pw: 4.87
o2 trim: 124
fuel trim high:127
fuel trim mid:114
fuel trim low:139
wb o2 15.72

Rpm: 5000
Knock:0
Timing: 25 deg
inj pw:12.82
o2 trim100%
fuel trim high:127
fuel trim mid:114
fruel trim low:139
wb 02:15.57

Rpm:5437
Knock:0
Timing:28
Inj PW:10.51
O2 trim:100
Fuel trim high:127
Fuel trim mid:114
Fuel trim low:139
WB o2:15.53




does this help at all
 
Upvote0
sorry that i cant give a good log..im having alot of problems getting it on the computer..but i do have some idle issues..at points it seems to drop to about 500 or so really fast and then pick back up..could that be whats wrong with my fuel trims..if there is unmetered air..


i really appreciate all the help
 
Upvote0
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