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Lack of power/acceleration

Tiny
BILL PREMORE
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 120,000 MILES
I have replaced intake gaskets, cats, fuel pump and filter plugs and wires maf map tps air filter. Truck starts and runs okay, but if you are cruising at lets say 30 mph and slowly push the pedal there is no response until it kicks into passing gear and to pass a car or climb a hill you have to almost floor it.
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Sunday, May 29th, 2016 AT 7:47 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes. Also check fuel pressure at rail maybe too low 55-62 psi except flex fuel 48-54 psi must meet minimum psi.
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Sunday, May 29th, 2016 AT 8:23 AM
Tiny
RENEE L
  • ADMIN
  • 1,260 POSTS
Hi Bill,

Here is a link to an article that features written step by step instructions and pictures explaining how to do the scan yourself, also I have included a link to our YouTube channel with a how to video on code scanning. Most scanners are inexpensive to purchase, you can purchase one online from sites like Amazon.com. Once you have the codes please get back to us so that we can further assist you. We are always happy to help.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

https://youtu.be/YV3TRZwer8k

Thank you for visiting 2CarPros.com.

Kindest regards,

Renee
Admin
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Sunday, June 5th, 2016 AT 12:12 PM

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