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D
DSinOR
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Joined
Mar 2, 2021
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May 6, 2022
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D
DSinOR
reacted to
Schurkey's post
in the thread
Hard to start - hunting & stumbling - only when cold.
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Pump pressure varies with available voltage through the pump motor windings. That is, the quality of the wire harness before the pump...
May 6, 2022
D
DSinOR
reacted to
TreeGeared's post
in the thread
Hard to start - hunting & stumbling - only when cold.
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Like
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You have the right idea using torque or another program. When I built my new engine I had a similar problem with unbalanced fuel trim...
May 6, 2022
D
DSinOR
reacted to
arrg's post
in the thread
Hard to start - hunting & stumbling - only when cold.
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Like
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Have you tried cleaning your battery cable ends and your grounds? Especially the fuel pump ground near the tank? Also, even though you...
May 6, 2022
D
DSinOR
reacted to
Schurkey's post
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Hard to start - hunting & stumbling - only when cold.
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1. Isn't 60 psi marginally low for a Vortec 5.7L? 2. I don't know DashCommand or Torque, but what sort of readings are you seeing...
May 6, 2022
D
DSinOR
reacted to
Schurkey's post
in the thread
Hard to start - hunting & stumbling - only when cold.
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Like
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Does the fuel pump prime for 2 seconds when the key is turned from "Off" to "Run"? What is the fuel pressure, cold? What is the...
May 6, 2022
D
DSinOR
replied to the thread
Hard to start - hunting & stumbling - only when cold.
.
Two days later: 1 - don't add FI cleaner into the previously described port on the throttle-body cap that receives the hose from the...
May 6, 2022
D
DSinOR
replied to the thread
Hard to start - hunting & stumbling - only when cold.
.
Spoke to the local dealer, twice. Pleasantly surprised by the willingness to help and also the on-tap knowledge of 5.7 vortec trucks...
May 4, 2022
D
DSinOR
replied to the thread
Hard to start - hunting & stumbling - only when cold.
.
Thanks for the reply. Years ago I modified the wiring under the underhood fuse box: I connected the fuel pump relay to pink. If the...
May 3, 2022
D
DSinOR
posted the thread
Hard to start - hunting & stumbling - only when cold.
in
Engine Performance + Maintenance
.
1996 5.7 Vortec Yukon 4WD, 245K original miles. Doesn't want to start when cold (if it sits out overnight, 50° or colder temps). I'm...
May 2, 2022
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