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03 5.3 loss of power, not always, intermediate


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jakklat
New User

Feb 9, 2017, 5:27 AM

Post #1 of 3 (173 views)
03 5.3 loss of power, not always, intermediate Sign In

03 Chevy 5.3 in my extend a cab, 167000 and normally runs great, just started loss of power, barely stay running with pedal to the floor, I checked fuel pressure, fine, Replaced fuel filter in the frame, still assing off, removed catalytic converters, still not right. Don't know what else to do and not waist money. Ideas??? Thank you, Jeff jakklat@yahoo.com


Discretesignals
Ultimate Carjunky / Moderator
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Feb 9, 2017, 8:43 AM

Post #2 of 3 (157 views)
Re: 03 5.3 loss of power, not always, intermediate Sign In

When you have loss of power does the engine feel like it is bogging out or skipping? Is the check engine light on? If so, what are the code numbers? What is the fuel rail pressure when the problem is occurring?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Feb 9, 2017, 9:31 AM)


kev2
Veteran
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Feb 9, 2017, 8:50 AM

Post #3 of 3 (151 views)
Re: 03 5.3 loss of power, not always, intermediate Sign In

To add and clarify colleagues suggestions...
scan for codes even if CEL light is off - often FREE at many auto parts stores... post ALL codes someone will advise.
What was the fuel pressure ?
You did reinstall the CAT after testing.
Let us know any modifications - remote start, added electrical ie GPS, audio alarm etc






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