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1998 Chevy Silverado Check engine light on

Tiny
LATRISTE
  • MEMBER
  • 1998 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 113,000 MILES
I have a chevy silverado 98 My check engine light is on I took it to 2 mecanics already I payed 400 to one and the other 800. The scanner keeps telling me the problem is a oxygen sensor but I changed one already the first mecanic told me that the proble was the regulator so he changed it and the other one told me that the problem are the gas injectors so he changed that and the spark plug wires too. When the light went on for the first time the car started to loos power it shackes and it smells like gas and the pipe is really black and it keeps trowing some black thing out the pipe. The first mecanic told me that he dosent know what it is the other is still working on it soposly and I dont want to keep waisting money for nothing. What can I do?
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Wednesday, February 27th, 2008 AT 5:12 PM

4 Replies

Tiny
DENNYP
  • MECHANIC
  • 1,823 POSTS
What trouble codes are stored in the computer?
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Friday, February 29th, 2008 AT 8:49 PM
Tiny
LATRISTE
  • MEMBER
  • 2 POSTS
The code is PO174 system to lean.
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Sunday, March 2nd, 2008 AT 6:12 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Sounds like a computer problem or ground problem. If the computer sees lean it will dump fuel to try to get rich, thus your problem. A real scanner with data stream will help
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Sunday, March 2nd, 2008 AT 6:42 PM
Tiny
DENNYP
  • MECHANIC
  • 1,823 POSTS
It could have a vacuum leak causing the O2 sensor to show lean. Then the pcm commands maximum fuel causing the rich condition.
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Monday, March 3rd, 2008 AT 6:45 AM

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