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Old 11-06-2007, 12:49 PM   #1
fractur3
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Member#: 151974
Join Date: Jun 2007
Chapter/Region: MWSOC
Location: Cincinnati
Default help with timing

took a look at my timing for my car becuase im having a missfire, and a bit of a hesitation issue at low rpm's. but for my timing advance for A, B and C, at .7 g/rev load at 800 is 8.09 and at 1200 is 5.98.. 8.09 seems way to high because under 2.9 g/rev it is 5.98.. something cant be right, but i dont know what any of this means as far as timing goes, so i dont want to change it because it could be that way for a reason...

then timing compensation for cylinder B and D, is 0 across the board. But for cylinder A, it reads this:
800= 0
1200= 0
1600= 0
2000= 0
2400= 0
2800= 0
3200= 0
3600= 0
4000= 0
4400= 0
4800= 0
5200= -1
5600= -2
6000= -3
6400= -1
6800= 0


then for cylinder C reads:
800
1200= 0
1600= 0
2000= 0
2400= 0
2800= 0
3200= 0
3600= 0
4000= 0
4400= 0
4800= 0
5200= -2
5600= -2
6000= -3
6400= -2
6800= 0

i can send you the rom to your email if you feel like helping me look at it, i have no idea what timing is or how to fix it, so im hoping someone on here does
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Old 11-06-2007, 01:12 PM   #2
Master2192
RIP 10/12/83 to 02/10/08
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Member#: 83254
Join Date: Mar 2005
Chapter/Region: NWIC
Location: Roy, Washington
Vehicle:
98 2.5 RS
04 WRX

Default

Those tables are normal, you should leave them alone.

The table you are looking for is Timing Advance, but you need to also look at the total ignition timing. Final timing is a combination of the base timing plus timing advance, having 8 there isn't that much if the base timing in that area is 2 or something like that. Just looking at the Timing Advance won't tell you anything.
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Old 11-06-2007, 07:47 PM   #3
bboy
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Location: Seattle, WA
Vehicle:
04 Improved STI
Dirty White

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Yes leave them alone. Those compensate for the propensity of cylinders 2 and 4 to detonate.
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Old 11-07-2007, 10:14 AM   #4
06rexwagon
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Location: Albuquerque, NM
Vehicle:
2006 WRX Limited Wag
9.9@142

Default

Which cylinder does logged ignition timing monitor? This may explain some STi logs I have of the car running less timing from 5000-6500rpm than base + IAM*KC. KC is exactly what is in the table, feedback correction is 0, but the logged timing is 2-3* less than it should be, but quickly comes back up to normal at high rpm.
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Old 11-07-2007, 10:53 AM   #5
Tea cups
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Default

Quote:
Originally Posted by 06rexwagon View Post
Which cylinder does logged ignition timing monitor? This may explain some STi logs I have of the car running less timing from 5000-6500rpm than base + IAM*KC. KC is exactly what is in the table, feedback correction is 0, but the logged timing is 2-3* less than it should be, but quickly comes back up to normal at high rpm.
When you log ignition timing, you are logging cylinder #1 which corresponds to table A. There are also rpm(max), ECT(min), load(min) thresholds involved that determine whether the compensation is active. It is likely that table B,C,D correspond to cylinders 2,3,4.
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Old 11-07-2007, 04:25 PM   #6
crazymikie
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Quote:
Originally Posted by bboy View Post
Yes leave them alone. Those compensate for the propensity of cylinders 2 and 4 to detonate.
If A=1, then isn't timing being pulled from cyls 1 and 3?
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Old 11-07-2007, 06:29 PM   #7
jays05
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05 STI 35r + e85

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Yup and #1/3 are further away from the knock sensor than 2/4
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