i've been doing some research on the vafc. i came across a thread discussing the ecu learning settings and adjusting them , but it was related to obd2 vehicles and i wanted to know if the same applied to obd1.

the thread is located here, http://forums.s2ki.com/forums/...99437.

i'm basically trying to determine the point at which ecu switches from closed to open loop and how to set my throttle settings accordingly. or if this even applies to obd1?

 

well i got my answer from a marcucci on PO.com

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Marcucci &raquo;</TD></TR><TR><TD CLASS="quote">Throttle position should be set based on how you want it to correct. You need to decide if you want to:

a) modify WOT tuning only
b) modify narrow throttle tuning too

Then you need to find out where the stock open-loop (WOT) throttle point is. In most OBD1 vehicles this is set to 33%. In most OBD2 Hondas it is higher like you found on s2ki.

There is usually no need to modify part-throttle settings on ANY car, unless it is highly modified and won't start, idle or run right without modification.

For yours I would set narrow throttle at 33%, wide at 35 or 40%, and then only tune on WOT settings. That is unless you have some serious fuel system or engine work done.

Todd
</TD></TR></TABLE>

 

most obd1 and obd2 cars wont switch to closed loop until a certain operating temp is reached, hence the use of 3 and 4 wire heated 02 sensors