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Engine wont start received codes P0171 and P0174 a week ago?

Tiny
FKYLE
  • MEMBER
  • 2002 CHEVROLET SILVERADO
  • 4.8L
  • V8
  • 2WD
  • MANUAL
  • 221,000 MILES
Received codes p0171 and p0174 a week ago engine would start and let idle for a bit then die. Start again run fine. Next two or three days same. Changed fuel filter, cleaned MAF, checked hoses and tighten manifold bolt still same. This morning started it, it idled then died. Did it again started it idled then died, now it wont start at all will turn over thats it
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Saturday, January 31st, 2015 AT 11:05 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuel pressure with a gauge auto parts rent it
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Saturday, January 31st, 2015 AT 3:56 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,756 POSTS
I have seen the fuel pump go out which is common in these trucks, which will get you these codes and stop the engine from running.

P0171: System Too Lean (Bank 1)
P0174: System Too Lean (Bank 2)

Please go over this video to show you how to use starting fluid which can confirm the fuel pump failure.

https://youtu.be/lXLJbuAZ4CE?si=lMXQJzQEKuglNyeN

Here is how to change the fuel pump out. Check out the images (below). Please let us know what happens.
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Tuesday, August 13th, 2024 AT 1:49 PM

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