km1125 wrote:Source of the post390Express wrote:Source of the post From what I can tell from digging into the MEFI 1-2 diagnostic manual, there's nothing in the ECU that provides a higher idle, that would otherwise make it stall later.
It's not really the higher idle, but all engines have to run a bit richer when starting from a cold start. Fuel injected engines run rich for a period of time, which can be a timer or by measuring coolant temperature.
The ignition observations are interested. Seems like you need to understand what's going on there. Can you put the old dist in there for testing?
Real time data stream on the scanner is fine. Everything looks normal, until it stalls. The issue presents as more of a fuel delivery issue, despite all evidence to the contrary (fuel pressure is good, fuel pump continues to run while stalling, injectors continue to fire as its stalling), so I'm going to try swapping out TBI uppers prior to swapping the distributor. I suppose it's possible for the regulator to allow proper bleed-off pressure (which is what's measured in the line), and not allocate proper injector pressure. It's about a 30-40min. swap to do both TBIs. This will eliminate the fuel pressure regulator and the injectors as potential problems.
If that doesn't fix it, I'm going to swap distributors rather than put the old one back in (another 30-40 min. swap). That's really all there is left, besides the wiring harness.
After those two potential problems sources are ruled out, I will have literally done every other damn thing I could do, other than internal engine components, and tracing issues at the harness. (recently pulled the 9 pin, and added Nygel... only other electrical component(s) that I could possibly swap are the breakers, but voltage checked out fine from one side of the breaker to the other while it was stalling)