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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15201
Experience:  GM Grand Master Technician 2007. 14 years experience.
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Lack of power on high end spark plugs ,wires ,coils

Customer Question

lack of power on high end spark plugs ,wires ,coils ,injectors ,and throtle body have been changed still unable to pull a trailer
JA: How many miles are on the car? When did you last change the plugs?
Customer: 200,000 miles all was just changed with in 2 weeks
JA: What is the model/year of your Chevy?
Customer: 2004 chevy silverado 1500 z71
JA: Are you fixing your Silverado 1500 yourself? What have you tried so far?
Customer: i had the local shop change the throtle body and idler pully i just checked fuel line pressure it was at 60lbs
JA: Anything else you want the mechanic to know before I connect you?
Customer: sounds like a squealing belt when get on the throtle idler pully and surointine belt also changed
Submitted: 4 months ago.
Category: Chevy
Expert:  AMEDEE replied 4 months ago.

Hello and welcome!

I am very sorry your having this issue with your vehicle.

I will try my best to answer all of your questions.

However, before we get started, please let me mention a few things.

1. If at any point you would like to speak on the phone, please feel free to request a phone call on your end and I can call you right away.

2. If you dont understand any technical terms or anything that I mention (component tests or theory or operation), please let me know and I will provide you with a more in debt explanation or answer.

3. Please understand that I am here to help you any way I can.

Expert:  AMEDEE replied 4 months ago.

Is the check engine light on? Are there any codes in the computer?

Does it bog down or hesitate under a load?

Does the engine idle OK?