heads are back on - made some runs and tuning

KasaRyan at aol.com KasaRyan at aol.com
Mon Nov 13 03:07:08 GMT 2000


heads are back on - made some runs and tuning

Well, - I have put everything back together on my truck, and set my 
mechanical timing (brown wire unplugged) to 8 BTDC.  I went around the block 
to make sure everything still worked and no funny noises and nothing leaked 
and parked it.  I re-burned my chip with the factory timing tables 
(bjym102.bin).  My fuel tables are basically stock.  I went for a run and WOT 
was great, but I got a lot of choogling over TC lockup and high map.  I did 
not get this with lots of timing before.  I added some fuel from 1200-2000 
and over 80kpa and got rid of most of it.  In this range I am now getting 
integrators of 137-141, so I am still a little lean.  I was also getting lean 
backfires until closed loop, so I lowered the open loop AFRs some.  I ran 
again and WOT was again great, and nicer open loop with less jerk.  Tomorrow 
I will change oil, as I am sure it is nasty, although I didn't see any 
chocolate milk.

>From my experience, you can clean up the cold running and prevent backfires 
by adding timing, but after the head gasket fiasco I don't really want to go 
that course.  If I do it by adding fuel (which my int numbers would seem to 
indicate) I am going to get really crappy gas mileage.  Although I don't 
spend much time at 1100 rpm, 40mph and 90kpa.

What say the lot of you?




Thanks for listening to my electroyappin!
Ryan Hampl - a K-State Grad!    kasaryan at aol.com
139 Hoover Ct.                  Controls Engineer (tubes rule!)  
Salina, KS  67401               97 B12 / 86 V65 / 93chevy truck EFI 383
phone  (785) 825 5831           I'M ALWAYS FIRST TO THE GROCERY STORE!
http://hometown.aol.com/kasaryan/myhomepage/hotspot.html
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