Haltech E8 home/trigger gain + idle
08-01-06, 09:15 PM
#1
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E8 home/trigger gain + idle
Here is the problem, Initially I setup the trigger and home gains to 1 with the filters on 2 and had no problems at all.
Now I am finding that it gets an early home at idle and low rpm and misfires real bad with those settings. If I set it to 2 and 2 it gets better, but still misfires around 800 rpm and lower. Setting the home gain to 2 with the filter at 1 solves this problem, but I am woried about driving with this setting.
I killed an engine when I set filter to 2 with home gain to 3 and 2/2 for the trigger.
It idled and ran perfectly untill around 4k rpm 2 or 3 pings did it in.
What can I do to make this better?
The car has a stock gen 2 ign system with a known good cas and other parts. Charge time is set to 4.5 ms. ign zeroed out at 98.5 and 9 with the cas in using the mazda method.
The CAS is connected to the haltech harness using directly using good silver solder. and the sheilding extends all the way to the CAS but isn't grounded to it.
thanks
Now I am finding that it gets an early home at idle and low rpm and misfires real bad with those settings. If I set it to 2 and 2 it gets better, but still misfires around 800 rpm and lower. Setting the home gain to 2 with the filter at 1 solves this problem, but I am woried about driving with this setting.
I killed an engine when I set filter to 2 with home gain to 3 and 2/2 for the trigger.
It idled and ran perfectly untill around 4k rpm 2 or 3 pings did it in.
What can I do to make this better?
The car has a stock gen 2 ign system with a known good cas and other parts. Charge time is set to 4.5 ms. ign zeroed out at 98.5 and 9 with the cas in using the mazda method.
The CAS is connected to the haltech harness using directly using good silver solder. and the sheilding extends all the way to the CAS but isn't grounded to it.
thanks
08-04-06, 05:01 PM
#3
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The car runs great, I re stabed a few times. Timing is zeroed fine.
I have another CAS that came off the JSPEC engine, I think I might compare the gaps, and switch to that one. It kind of pusles me that others can set the gains to 0 and have their car still run.
I have another CAS that came off the JSPEC engine, I think I might compare the gaps, and switch to that one. It kind of pusles me that others can set the gains to 0 and have their car still run.
08-07-06, 12:27 PM
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dont be puzzled - electronically turning a sine wave into a square wave with varying amplitude is a pain in the butt....this is what the ECU has to do with your CAS.
The long of the short is very small tolerance in air gap, sensor resistance, and even the electronic components in the ECU can cause different numbers in the gain settings to convert the sine wave to a square wave.
I wouldnt be bothered so much to what the numbers are more i would look at is the timing correct when you zero the timing....not just at idle but also when you rev the engine...so recheck the timing at say 4000 RPM as well.
The long of the short is very small tolerance in air gap, sensor resistance, and even the electronic components in the ECU can cause different numbers in the gain settings to convert the sine wave to a square wave.
I wouldnt be bothered so much to what the numbers are more i would look at is the timing correct when you zero the timing....not just at idle but also when you rev the engine...so recheck the timing at say 4000 RPM as well.
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