ok gang! I too have the wonderful hard cold start issue that has been
going on since last Jan.
I have done plenty of reading on it and want some conversation!
95 safari 4.3 120,000 -no codes
Problem: When weather is under 28 degrees F , (NEVER takes more than
1/2 crank to start when 3o degrees or so. engine will take 5-6 times to
start. She will catch and stall but finally on the 4th or 5th she
usually stays running. Yes, I have tried to cycle the pump. My father
was a GM tech so Yes, I do know what a wrench is and all of the
components of this vehicle. (so feel free to speak in terms of tech
talk if need be)
I have read about others with the same issue and have heard everything
1. fuel pump -(pressure checked fine last year when this acted up (new
filter within last 6
mos. (yes I can hear pump)
2. fuel pressure regulator
3. spyder injector
4. coolant temp sensor
5. plugs out of gap
6. engine temp sensor
I realize that all these things could trigger this issue. This only
happens when its freezing out and will do it every time once she has
sat for 8 hrs and engine goes cold. Thanks for anyone who thinks they
can really identify the culprit here.