SNAKE_15
10+ Year Contributor
- 572
- 48
- Aug 28, 2012
-
Bakersfield,
California
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Your TPS is way off as well. If your throttle body has not been rebuilt before, I would recommend checking for leaks at the shaft seals. The below videos are quite helpful to get your feet wet
i was confused on this too. Do i check both check boxes or just the diagnostic pin before adjusting my biss? when i checked both boxes, my isc was at 9 but still didnt move when turning biss screw.I'm at work so I can't see your log, but here are some thoughts:
- +1 on what 2gmitsu said, your TPS needs to be at .63v at idle. Either adjust it by hand or use the compensation tool in ECMlink.
- Are you using the checkbox to ground the diagnostic pin in ECMlink when you adjust the BISS?
- Have you checked to see if the idle speed controller (ISC) itself is functional? [video link below shows you how to test ISC]
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i was confused on this too. Do i check both check boxes or just the diagnostic pin before adjusting my biss? when i checked both boxes, my isc was at 9 but still didnt move when turning biss screw.
Correct. When I adjusted my biss with these two checked, my isc stayed at 9. So I set my isc at 30 with the diagnostic pin checked and once that's done, I uncheck it?I assume you're referring to the check boxes that are under the "Misc" tab on the right hand side?
The first check box is for stabilizing the timing so you can set your mechanical timing with a timing gun. Leave it unchecked for the BISS changes.
Under that check box is the one you need for the BISS adjustment. It says something along the lines of "ground diagnostic pin to ECU"
I'll test the actual isc first and do a blt. I never had any idle problems so I don't think it's broken but I will check anyways.Correct. However....
Verify you have no boost leaks or vacuum leaks first.
Have you confirmed that the ISC works? It is easy to test. Just two 8mm bolts, test the pins for resistance, and you're done.
If anything is off, it will cause an unstable idle and no amount of BISS adjustment will fix it.
I'm at work right now, but I'll check later tonight. My throttle stays at 3% unless I do the tps adjust which was recommended on the demos. I know it works because if I tap on the gas, the isc position increases.Here is more to read up on:
http://www.ecmtuning.com/wiki/idlesurge
I would test the isc via info given to see if it operates when ignition is on. I would then start from scratch. Check mechanical stuff first and boost leak test, then move on to idle tune. Throttle % should be 0 unless you were on the throttle a touch as the idle screw reads 0.