holb
15+ Year Contributor
- 36
- 0
- Dec 22, 2007
-
Columbus,
Georgia
I got a logger in the car this weekend. After doing 2-3 pulls I noticed all of them was pulling really hard timing. at 3,700rpm-4,400rpm it would drop timing all the way to sometimes 7 degrees for a second then slowly build up. I thought something was seriously wrong, so I check the knock sensor by running low PSI and leaning it and it showed knock like it should then checked the sensor it self and it's fine.
Now I got excel on the PC today and loaded the logs and I looked at the log on the PC and the timing was, a little high, but that was due to me cause I thought it was getting pulled. Also the log showed really high IDC on the PC.
Some examples being.... Done at only 16psi - s16g - 550cc - 2gmaf - stock 5* timing advance - fpr @45psi vac off
On Palm: 4468RPM - 99.6% TPS - 9* TIMA - 19.4ms INJP - 71% INJD - 0.80 O2r - knock 0
On PC: 4468RPM - 100% TPS - 19* TIMA - 19.46ms INJP - 92% INJD - 0.80 O2r - knock 0
On Palm: 5625RPM - 99.6% TPS - 11* TIMA - 18.6ms INJP - 87% INJD - 0.78 O2r - knock 1
On PC: 5625RPM - 100% TPS - 21* TIMA - 18.5ms INJP - 110% INJD - 0.78 O2r - knock 1
ISC was 101 at WOT on both.
These are from the same pull at the same time at just different RPMs to show you more in depth.
02 shows lean, but duty cycle shows way to high to be that lean at 16psi with 550cc on a small 16g. No way am I running that lean at that IDC on 550s at 16psi. Many people say ignore the o2 so I have. Spark plugs don't show it running lean. but the change in timing by what it looks like is +10 difference from logger to PC, and the IDC being WAY TOO HIGH on the PC end scares me.
The changes from PC to logger only happen in WOT. Idle is still at 5-6* at idle on both.
Is this normal? I doubt it is, that's why I'm posting.
I thought my timing or motor was seriously messed up seeing that timing pulled now this has me thinking even more.
Also, the car doesn't start up unless I leave the key in and turn the power on and let it sit for 10-15mins, then starts up fine. I usually can start it fine when the stock boost gauge goes to 0 vac. When I can't start it, the gauge is below -7 like it's dead. Maybe this is connected, no idea.
Now I got excel on the PC today and loaded the logs and I looked at the log on the PC and the timing was, a little high, but that was due to me cause I thought it was getting pulled. Also the log showed really high IDC on the PC.
Some examples being.... Done at only 16psi - s16g - 550cc - 2gmaf - stock 5* timing advance - fpr @45psi vac off
On Palm: 4468RPM - 99.6% TPS - 9* TIMA - 19.4ms INJP - 71% INJD - 0.80 O2r - knock 0
On PC: 4468RPM - 100% TPS - 19* TIMA - 19.46ms INJP - 92% INJD - 0.80 O2r - knock 0
On Palm: 5625RPM - 99.6% TPS - 11* TIMA - 18.6ms INJP - 87% INJD - 0.78 O2r - knock 1
On PC: 5625RPM - 100% TPS - 21* TIMA - 18.5ms INJP - 110% INJD - 0.78 O2r - knock 1
ISC was 101 at WOT on both.
These are from the same pull at the same time at just different RPMs to show you more in depth.
02 shows lean, but duty cycle shows way to high to be that lean at 16psi with 550cc on a small 16g. No way am I running that lean at that IDC on 550s at 16psi. Many people say ignore the o2 so I have. Spark plugs don't show it running lean. but the change in timing by what it looks like is +10 difference from logger to PC, and the IDC being WAY TOO HIGH on the PC end scares me.
The changes from PC to logger only happen in WOT. Idle is still at 5-6* at idle on both.
Is this normal? I doubt it is, that's why I'm posting.
I thought my timing or motor was seriously messed up seeing that timing pulled now this has me thinking even more.
Also, the car doesn't start up unless I leave the key in and turn the power on and let it sit for 10-15mins, then starts up fine. I usually can start it fine when the stock boost gauge goes to 0 vac. When I can't start it, the gauge is below -7 like it's dead. Maybe this is connected, no idea.
