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DDSinOR reacted to Schurkey's post in the thread Hard to start - hunting & stumbling - only when cold. with
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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... -
DDSinOR reacted to TreeGeared's post in the thread Hard to start - hunting & stumbling - only when cold. with Like.
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...
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DDSinOR reacted to arrg's post in the thread Hard to start - hunting & stumbling - only when cold. with Like.
Have you tried cleaning your battery cable ends and your grounds? Especially the fuel pump ground near the tank? Also, even though you...
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DDSinOR reacted to Schurkey's post in the thread Hard to start - hunting & stumbling - only when cold. with Like.
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...
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DDSinOR reacted to Schurkey's post in the thread Hard to start - hunting & stumbling - only when cold. with Like.
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...
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DDSinOR 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...
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DDSinOR 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...
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DDSinOR 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...
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DDSinOR 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...
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