Wrench warning light turned on

147,000 MILES • 5.6L • V8 • 4WD • AUTOMATIC
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DAVID BEAM
  • MEMBER
  • 1 POST
Bogs down on acceleration after changing out fuel pressure regulator still. When the engine flounders the wrench dash light comes on.
Feb 9, 2022 at 11:45 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
Hi,

Have you checked for diagnostic trouble codes? If not, that is where I would start. Here is a quick video showing how it is done:

https://youtu.be/b2IJGfImVvw

Next, have you confirmed the fuel pressure is within the manufacturer's specifications? If it is too low, that can be an issue as well. Also, a partially plugged catalytic converter can cause this to happen.

Here is a link showing how to test fuel pressure:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let me know if you notice any odd odors from the exhaust, if there is black or dark gray smoke from the exhaust, or anything you can think of that may help me diagnose this. Additionally, let me know if the check engine light flashes when it turns on or is it solid.

I will watch for your reply. If you have already scanned the computer for codes, let me know what they are.

Take care,

Joe

Feb 10, 2022 at 10:41 AM
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