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Got my usb aldl cable. What now? *EDIT-NEW heated o2 data is up!!!.*
- Thread starter y5mgisi
- Start date
Couple things:
1. Your vacuum is still a hair lower than I think it should be, try advancing your timing a bit
2. This may be fixed by advancing the timing a bit, but your idle screw is set a little bit low. The IAC is a bit too far shut at idle, should stay around 25 counts. The truck's surging may be it thinking the engine is about to stall, so it ups the idle a bit to try and prevent as much.
3. The ECM is still seeing the engine as running overly rich and is cutting fuel to try and compensate. Your exhaust still looks colored to me, indicating that there is too much fuel running through there, so I believe as much. This could also be caused by the timing not being quite right.
1. Your vacuum is still a hair lower than I think it should be, try advancing your timing a bit
2. This may be fixed by advancing the timing a bit, but your idle screw is set a little bit low. The IAC is a bit too far shut at idle, should stay around 25 counts. The truck's surging may be it thinking the engine is about to stall, so it ups the idle a bit to try and prevent as much.
3. The ECM is still seeing the engine as running overly rich and is cutting fuel to try and compensate. Your exhaust still looks colored to me, indicating that there is too much fuel running through there, so I believe as much. This could also be caused by the timing not being quite right.
y5mgisi
1 ton status
Thanks Russell. The timing is actually set at about 8ish* to get it even to that point... turning it back any further makes it worse. Im pretty well convinced that there is something off somewhere involving the cam. Either its just too big, it was miss boxed, its ground retarded/advanced, the timing set is installed in the advanced/retarded keyway, etc. Im losing motivation really really fast though now as i believe i MIGHT have a main bearing knock... Sounds pretty hellatious for the first 10 seconds or so after startup then goes silent.
y5mgisi
1 ton status
Coulpe more(crapy) vids. Diss-regard the super man jammies. It was early morning for me and i wasnt ready to really get the day started yet.
http://www.youtube.com/watch?v=frZxMA0H6Ms
http://www.youtube.com/watch?v=Ls6nlLhliwo
http://www.youtube.com/watch?v=cbT9GCW5ojY
http://www.youtube.com/watch?v=frZxMA0H6Ms
http://www.youtube.com/watch?v=Ls6nlLhliwo
http://www.youtube.com/watch?v=cbT9GCW5ojY
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You are still cold at 180. What is the BCC of your chip I will look it up what temp should be.
Your vacuum is low, converted it's about 16 -17 unless your at about 5000 foot elevation.
Your BLM is max rich. Your O2 is almost max rich all the time.
These are all looking at idle...
If you put a vacuum pump on the MAP sensor and suck it down to 19-20 and see how it idles?
If those cam specs you have are correct then you may be off a tooth? But since you say it runs so well otherwise I would say the cam change needs a chip to go with it!
y5mgisi
1 ton status
Do that and runs perfect. In one of the videos i posted up here you can see a vacuum gauge running and it is low. I have pretty much decided its the cam. Or possibly degree wrong or something like that. I think if it was off a whole tooth it would run really bad but i dont know. After all this i MIGHT have a bad main bearing or something. Its starting to make a hellatious noise on start up... The motor just needs removed, re gone threw and re installed with a stock cam.
Yup... 
y5mgisi
1 ton status
I had a buddy of mine over at one point who has a 91 tbi 350 burb and we were going back and forth from his truck to mine testing stuff. His had a bit more vacuum then mine. When we sucked my map up with a vacuum pump to where his was, it ran perfect.
Well that did it for ya! Hope you get er worked out.
For everyone reading this thread. And everyone guessing at what was wrong using your past experience. That shows you want to be helpful but there is an easier way to do this and it's all outlined in a sticky post in the EFI section.
http://coloradok5.com/forums/forumdisplay.php?f=81
It will tell you how to get your codes with a paper clip, what those codes are and lead you too and GM's way of going through the diagnostic procedure to fix the issue!
For everyone reading this thread. And everyone guessing at what was wrong using your past experience. That shows you want to be helpful but there is an easier way to do this and it's all outlined in a sticky post in the EFI section.
http://coloradok5.com/forums/forumdisplay.php?f=81
It will tell you how to get your codes with a paper clip, what those codes are and lead you too and GM's way of going through the diagnostic procedure to fix the issue!
