Injector vs. Voltage Offsets
I had this happen on mine...ended up being the throttle cable was a little tight causing the idle to be high. The ecu attempted to bring down idle by pulling timing. 6* of timing and my manifolds were glowing.
Hadn't thought about that one, but sure can see it happening if the base idle spark advance was low enough and the idle over speed table had high enough numbers in it. Both mistakes inho.
Base idle set to 18, other table stock to the best of my knowledge. Most idle tables I left stock. I had a "base tune" sent to me that I have been moving back to stock. I will have to go back and look now though when I get off work, lol.
Now, the blade has a hole drilled in it from the previous owner, and I should have had it fixed before the dyno but slipped my mind so I know, I know.
Question is, if it was dyno tuned with that hole, shouldn't idle know that and be fine?
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Verdad Gallardo Yup, look at target idle speed in the tune for a specific coolant temp and see where your car is idling. If it is targeting 800 and you are idling at 1100 rpms then you may have to adjust the throttle stop or cable.
Just went back and looked and compared my file to a stock 2000 z28 and it is identical in the over speed table.
There's nothing says you have to keep overspeed spark
correction. You might keep underspeed, where it stops
the motor dying, but let idle air trims try and deal with
the high side by themself (if able). Don't see any info on
what IAC position is (if cable throttle), whether it has
or hasn't got authority - that is the question as regards
vacuum leaks and hole sizes.
correction. You might keep underspeed, where it stops
the motor dying, but let idle air trims try and deal with
the high side by themself (if able). Don't see any info on
what IAC position is (if cable throttle), whether it has
or hasn't got authority - that is the question as regards
vacuum leaks and hole sizes.
When he says shut he means adjust it more. check you IAC's and report to us the numbers your getting. That will tell you a little right there. But as said above timing will cause that problem
