19Eclipse90
DSM Wiseman
- 5,702
- 1,731
- Sep 29, 2003
-
OKC,
Oklahoma
Honestly curious what everyone sees in these logs. Fairly stock 1990 Eclipse GST: stock replacement fuel pump, 450cc injectors, N/T FPR (supposedly), Evo III 16G at wastegate pressure, hacked air can but otherwise original MAF, FP exhaust manifold, and Link V3.
First, I jumped-started the car while logging and everything is great. Smooth throttle response, smooth idle, etc. Nothing appears too exciting for me. I may have messed with the fuel settings a couple times throughout. But again, everything appears to be working fine.
Second, I was testing to see whether there was a voltage supply issue and if the engine operation would improve while the battery was being jumped. After reaching operating temp and idling for quite a while, idle gets choppy and eventually the car stalls.
As the car started "acting up", it seemed like it would stay in Open Loop. Eventually, it would stall. I actually locked it in open loop once and made the engine stall. The second log is a capture of the idle transitioning from sustaining to failing. What I see is ISC unable to operate properly for some reason (ISC was replaced a couple years ago with working unit, but the old one only kept the car from idling properly, it did not keep the engine from running) and O2 sensor not cycling the way it should, maybe some funny business with the CTS when it starts to stall out.
Third log is, again, trying the car with battery jumped and a different CAS.
Again, kinda just curious if there's anything blatantly standing out to anyone in these logs. These (and many others available) were taken all in the same day in a span of 1 hour and 45 minutes. No DTCs at any point.
Thanks everyone.
First, I jumped-started the car while logging and everything is great. Smooth throttle response, smooth idle, etc. Nothing appears too exciting for me. I may have messed with the fuel settings a couple times throughout. But again, everything appears to be working fine.
Second, I was testing to see whether there was a voltage supply issue and if the engine operation would improve while the battery was being jumped. After reaching operating temp and idling for quite a while, idle gets choppy and eventually the car stalls.
As the car started "acting up", it seemed like it would stay in Open Loop. Eventually, it would stall. I actually locked it in open loop once and made the engine stall. The second log is a capture of the idle transitioning from sustaining to failing. What I see is ISC unable to operate properly for some reason (ISC was replaced a couple years ago with working unit, but the old one only kept the car from idling properly, it did not keep the engine from running) and O2 sensor not cycling the way it should, maybe some funny business with the CTS when it starts to stall out.
Third log is, again, trying the car with battery jumped and a different CAS.
Again, kinda just curious if there's anything blatantly standing out to anyone in these logs. These (and many others available) were taken all in the same day in a span of 1 hour and 45 minutes. No DTCs at any point.
Thanks everyone.