trying to figure out why i cant get my xfi 2.0 to start as well as pauls classic, we discovered his other car with xfi wont start as easy either. Mine has to crank and crank and crank before she will fire, his classic will make 2 revs then fire right up. Ive copied all the tables, iac cranking fuel, even scaled the injectors from his 72's to match the same pulswidth i would need with the 83's. I even have gone as far as to adjust the battery offset voltage to match. Still no dice.
we logged my car xfi 2.0 with caspers direct harness, his ttop with xfi (1.34) and caspers adapter, and finally his 87 gn(x) with classic fast and precision harness and noticed some weird things.
as you can see with the classic everything is fine, rpm readings and injector dutycyle are in line with what we would expect:
ttop with xfi and caspers adapter- rpms read 12750 and dutycycle is maxed out for the moment
my car- 2.0 with direct harness, notice the rpms jump to 1500 and the dutycycle is maxed at 100%. (as a side note mine would not record an a/f richer then the leanest (15.94) xfi can read untill 3 seconds after the initial crank.
Could this be why we cannot get any xfi to start as well as the classic?? something has to be going on in the background here...
we logged my car xfi 2.0 with caspers direct harness, his ttop with xfi (1.34) and caspers adapter, and finally his 87 gn(x) with classic fast and precision harness and noticed some weird things.
as you can see with the classic everything is fine, rpm readings and injector dutycyle are in line with what we would expect:
ttop with xfi and caspers adapter- rpms read 12750 and dutycycle is maxed out for the moment
my car- 2.0 with direct harness, notice the rpms jump to 1500 and the dutycycle is maxed at 100%. (as a side note mine would not record an a/f richer then the leanest (15.94) xfi can read untill 3 seconds after the initial crank.
Could this be why we cannot get any xfi to start as well as the classic?? something has to be going on in the background here...