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| Northstar 6 Speed (Page 11/20) |
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ryan.hess
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FEB 14, 05:26 PM
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| quote | Originally posted by Zac88GT:
The dakota digital signal converter seems quite sensitive to electronic inference. |
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I hated that thing! That was one of the (many) reasons I went to the 7730 ECM and ditched the Holley.
Do you have a frequency counter function on your volt meter? Or can you find some other way to verify the 6sp PPM?
There's got to be a way to get the ECM reading correctly without extra stuff. Does the output shaft just have a reluctor and pickup? Can it be removed easily? (Maybe some teeth can be ground off?)
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Zac88GT
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FEB 14, 07:56 PM
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| quote | Originally posted by ryan.hess:
There's got to be a way to get the ECM reading correctly without extra stuff. Does the output shaft just have a reluctor and pickup? Can it be removed easily? (Maybe some teeth can be ground off?)
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The sensor actually picks up from the differential ring gear teeth, so i can't really grind any off, haha. It seems to be burning more oil now  Not to sure what to do, i'm gonna do a quick compression check. If i unhook the pcv it doesn't seem to have much blow by though. I think the lean exhaust gas problem, for some reason the sensor isn't outputing the proper voltage, not sure if it's a busted sensor or something else wrong but that would explain the super rich mixture and why the computer thinks it's running lean.
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Will
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FEB 14, 08:56 PM
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| quote | Originally posted by Erik:
So how does it feel when accelerating? Do you feel conifdant that you could take on a 350z, C6 or some other newe sports car ?? |
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350Z's are slow. A C6 would be a nice setup, but I think they run LOW 12's stock.
| quote | Originally posted by Zac88GT:
The sensor actually picks up from the differential ring gear teeth, so i can't really grind any off, haha. It seems to be burning more oil now Not to sure what to do, i'm gonna do a quick compression check. If i unhook the pcv it doesn't seem to have much blow by though. I think the lean exhaust gas problem, for some reason the sensor isn't outputing the proper voltage, not sure if it's a busted sensor or something else wrong but that would explain the super rich mixture and why the computer thinks it's running lean. |
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Ring gear teeth? Interesting. So if you swap in the 3.91 ratio from a Saab, you have to adjust the VSS constant... This is progress?
I'm sure you'd have mentioned if it were missing, but a miss can cause the ECM to bias rich because it puts extra O2 into the exhaust. A manifold flange leak can do the same...
You mentioned rings sealing... Did you overhaul your engine? How many miles are on it?[This message has been edited by Will (edited 02-14-2008).]
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Alex4mula
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FEB 14, 08:56 PM
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| quote | Originally posted by Zac88GT:
..The dakota digital signal converter seems quite sensitive to electronic inference. It displays fine when the car is in motion but when the car is stopped the needle wiggles around a little bit, and i've already set it to the non-sensitive setting. ... |
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This is a common known issue with the G6/Dakota unit and several ECMs. Mine started to do it but for whatever reason not immediately. There is s filter fix to eliminate it. I haven't installed mine.
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Zac88GT
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FEB 14, 09:23 PM
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I'm not sure what's going on with the oxygen sensor but it's either screwed or something is messed up in the wiring. The wiring shouldn't be messed up because all i've done is lengthen the connector by about a foot since it last worked fine. The sensor is only a year old and only has maybe 500km's on it. It was reading a steady ~200mV no matter what the AFR. Then i cut a lead to an old narrow band afr gauge i had running off of it and the output jumped up to ~450mV but still doesn't change with AFR. Man i hate electrical problems. Anybody have any ideas? I tried disconnecting the PCV system and driving around but it still burns oil. I pulled all the plugs and did a compression test.
#1____200
#2____195
#3____200
#4____205
#5____195
#6____180
#7____215 (slightly off because of excess oil in cylinder)
#8____220 (slightly off because of excess oil in cylinder)
Number 6 seems a little low but I don't know if i'm ready to rip out the motor for that yet, I also think there is a ticking lifter on that cylinder. All the plugs were dry when i pulled them out except 7 and 8. They were slightly wet with oil. So it's definatly 7&8 that are burning the oil, which is why I thought PCV, because they are the first 2 cylinders that would see the oil, and also when i rebuilt the motor, the intake manifold had a pool of oil in the bottom of it. I cleaned that all out but maybe now it has some in it. I'll have to pull the CAI off and check.
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Will
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FEB 14, 09:40 PM
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Did you have the cylinders honed?
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Zac88GT
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FEB 14, 10:23 PM
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I used a ball hone on it, but it smokes exactly the same as it did when i first got it. So that leads me to believe it's not the rings.
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J Gunsett
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FEB 15, 01:10 PM
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I think the problem with the flaky speedo reading at low speed or stopped is you need more signal. You can do this by building a simple circuit on Rockcraw's web page (I may have one laying around If you need one). In talking to Dakota Digital I think they said to take a 12 volt source through a 10K (may have been a little higher) resistor and tie it to the high side of the VSS signal.
Hope this helps, Jack------------------
If you can not run with the big dogs, stay on the porch!
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Erik
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FEB 15, 01:37 PM
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Erik
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FEB 15, 03:03 PM
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| quote | Originally posted by Will:
350Z's are slow. A C6 would be a nice setup, but I think they run LOW 12's stock.
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. I can barely edge them out with my 3.4 DOHC on a roll from 35 to 40 mph and only up to about xxxmph . Stock they are in the mid to low 13's in th 1/4 and low 5's 0-60. I can waste one from dead stop in a short race though.
I am expecting my N* swap will obliterate one. It better or I am going to be unhappy
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