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Originally Posted by sacarguy
lower you iac at crank for cold temps and raise your low temp cranking fuel up ..
also is your pump wired up to prime when you key on or is it just constant after sitting for a decent amount of time without a priming pump this can happen as you lose fuel preasure in the rail.
leaning out
2 things
1 do you have the wide band setup so you are in closed loop .. your raising the fuel preasure and can be fatenting it up causing the ecu to start corecting the other way.
2 are you sure your fuel pump can handle the load of the higher preasure without losing a ton of volume.
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I think Mike Norris finally got the cold start figured out. And with my latest changes it starts faster than my truck! Amazing, but true.
But to answer your questions:
1. Yes, I have a priming sequence. At key "on" the pump primes for 10s, and I get fuel pressure after about 4s. I then start the car. It starts immediately now!
2. I'm using an Aeromotive A1000. I'm sure it can deal with volume at higher pressure.
3. I've got a wideband and run closed loop after the engine warms up.
jp