For about a month I've started observing my LTFT and other parameters to see if there are any patterns in my KR (seeing up to 5 degrees), and I've found that my LTFT is way in the negative. It averages maybe -15, but the worst I've seen it is at least -20 and the best I've had is about -5.
- Injectors are very new with only a few thousand miles on them
- Happened before & after installing my Intense PCM
- Just replaced & cleaned MAF
- Just inspected & cleaned EGR
- Just replaced both O2 sensors with Denso's
- Just cleaned TB
- Checked for vac leaks twice now, found nothing
- Can experience hard starts when hasn't been driven for at least ~16-20hrs, although fires up perfectly if primed twice (maybe related?)
- 60 psi key-on fuel pressure, 55 psi running
- Small exhaust leak where downpipe bolts to manifold (past the upstream O2)
Only codes I get are P0300 and occasionally P0703
Any ideas, suggestions?
