Flex Fuel Timing Advance Datalogging
Flex Fuel Timing Advance Datalogging
This is my first time tuning using the flex fuel compensation tables. Fuel compensation worked great and is right in range. Ignition however is set to 2 degrees at 60% and 4 degrees at 85%. I'm currently tuning exactly at 60% ETC. I am doing street pulls before I hop on the dyno and I noticed when looking at the datalogs its not showing the additional advance from this table. Is the datalog supposed to show this or will it always show the base timing map? For example at 10psi my base ignition table is set to 22 degrees. After the additional 2 degree advance from the flex fuel table I was expecting to see 24 degrees in the log but it still shows 22. Plugs look very conservative. Timing mark is towards the bottom of the strap bend and the insulator is clean white. I'm going to leave it as is until I figure the logs out.
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Re: Flex Fuel Timing Advance Datalogging
There are 2 areas where you go into boost but they are at different boost pressures, and both do appear to be adding ignition timing from what the table is calling for to what it is displaying as the timing it is running. There is also some AIT ignition compensation that may be removing some timing.
Re: Flex Fuel Timing Advance Datalogging
The first area is low boost map and the second is high boost. I do see i'm just creeping into the IAT compensation. Definitely need a bigger intercooler on this setup. I'll try again tonight and see what the data shows. Any way I can add ignition compensations to the graph templates? I don't see those channels listed but maybe I'm just missing it.
Re: Flex Fuel Timing Advance Datalogging
I'm sorry, but there are no data channels for those values.
Re: Flex Fuel Timing Advance Datalogging
Just took it out for a drive to a meet tonight and had a weird issue happen on the way down. About 30 minutes in I'm just cruising on the interstate doing 75ish and all the sudden the tach went to zero, the throttle stops working, the car starts to just decelerate. Then after about 10 seconds the oil & battery light came on. I shut the car off while rolling and turned it back on. It started back up and drove off like normal. I'm really hoping the onboard datalogging caught that. Unsure of what it could be none of my cars have ever done anything like that. The only recent changes I made were adding the ETC sensor & connecting the 5v wideband output to the ECU.
Re: Flex Fuel Timing Advance Datalogging
it sounds like it lost power.
Re: Flex Fuel Timing Advance Datalogging
Same thoughts I had. I'll check battery connections as I did remove the battery to wire through the firewall.
Re: Flex Fuel Timing Advance Datalogging
Checked all connections and everything looked fine. 45 minute ride home was okay. Did a few pulls and the car ran fine. Now I did get some logs from the ride. One is corrupt which I'm guessing is the one where the car had the issue. But looking at the logs before that one there's definitely some weird stuff going on with the sensors. A couple of the logs look like this for short periods of time. The logs from the ride home afterwards all look perfect.
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Re: Flex Fuel Timing Advance Datalogging
If it is not currently doing it then I wouldn't worry about it.