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1998 Chevrolet Silverado Codes P0300, P0306 and P1154

Tiny
MUTT1972
  • MEMBER
  • 1998 CHEVROLET SILVERADO
  • 298,000 MILES
Just replaced all fuel injector (spider body assembly)
And my truck is still showing these codes. Just replaced coil and plugs and plug wires also. It's been idling rough while idling at red lights. Running rough on initial acceleration ( takeoff) and also getting poor gas mileage.
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Saturday, October 12th, 2013 AT 11:46 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have a pro diagnose the misfire codes as they are very hard to diagnose even for a pro. You migh tcheck maf sensor the other code is the O2 sensor is operating slow which may be from the first two codes sent. Only other thing you can really do is check compression and if low then that may be your problem.
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Saturday, October 12th, 2013 AT 12:14 PM
Tiny
MUTT1972
  • MEMBER
  • 2 POSTS
Thank you very much!
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Saturday, October 12th, 2013 AT 12:21 PM

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