DFI open/closed loop problems

Andris Skulte askulte at emerald.tufts.edu
Mon Apr 6 01:13:50 GMT 1998


I put the DFI in yesterday, and everything is running pretty well. The
one major problem right now is getting the darn thing into closed loop.
>From what I've got programmed, it should be in closed loop above 100
degrees coolant, 750<rpm<2000, TPS<70%. I've been driving around, but it
just stays into open loop. Idle, cruise, whatever, it is still in open
loop. A weird symptom is the 02 is always 806mV at whatever throttle I'm
at. I richened the entire fuel map 10% to raise the o2's, but it still
stay at 806. I then lowered the stock fuel map 7%, and o2's didn't
change at all. I figured in open loop they should change. I'm pretty
sure the o2 sensor works correctly, since the volts climb as it warms
up, and when I shift or lift off the throttle, they drop down from
806mV. I will be putting the heated O2 next weekend, in the hope that
will cure some of this... Any ideas?

Andris



More information about the Diy_efi mailing list