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1997 Chevy Silverado Engines Misfires

Tiny
BELP24
  • MEMBER
  • 1997 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 180 MILES
Hello
I have one of the worst code on my truck.A PO300! I brought the truck to my Chevy dealer ask them to set timing correctly and run a scan test. Result they told me that #3 injector was stuck. So I removed the spider assy. And noticed that #3 was stuck so I replaced it and guess what. Nothing changed! Spark plugs, wire, cap rotor, fuel filter changed seafoamed it and still nothing!

Any idea would reallly be appreciated

talked back wih dealer and they dont have a clue!
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Monday, May 31st, 2010 AT 7:57 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the no.3 sparkplug and compression-P0300 is normally caused by vacuum leaks and contaminated
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Monday, May 31st, 2010 AT 11:49 PM
Tiny
BELP24
  • MEMBER
  • 2 POSTS
I Changed spark plugg #3 last sunday the one I had was quite black. And when I did a spark test with that plugg spark was yellow. So I put a new one in it and still nothing. (Its a Delco plugg)

I will take compression in that cylinder this weekend. Really hope its good

All of my pluggs are new from last summer any idea of what could cause yellow spark?
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Tuesday, June 1st, 2010 AT 8:34 AM
Tiny
BELP24
  • MEMBER
  • 2 POSTS
When you say contamination what do you mean? Fuel or something else?
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Tuesday, June 1st, 2010 AT 8:36 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Yellow spark indicates weak ignition -test the coil also for contamination its bad fuel
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Tuesday, June 1st, 2010 AT 3:51 PM

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