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service engine soon light blinking constantly

  #1  
Old 01-13-2019, 10:00 PM
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Default service engine soon light blinking constantly

97 blazer 4dr 4wd automatic: replaced cap, rotor and plug wires due to random miss fire code setting. a couple weeks later develops this new problem. idleing rough running rough fuel gauge needle bouncing up and down which seems to correspond to the roughness of the rough idle. needle holds steady under acceleration also needle spikes if i shift back an forth between drive and reverse, drive spikes, reverse spikes, drive spikes and so forth. also the service engine soon blinks continuously steady.
 
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Old 01-13-2019, 10:19 PM
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The blinking check engine means a severe misfire. Not sure about your other symptoms
 
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Old 01-14-2019, 08:36 PM
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Originally Posted by backanforth10to2 View Post
97 blazer 4dr 4wd automatic: replaced cap, rotor and plug wires due to random miss fire code setting. a couple weeks later develops this new problem. idleing rough running rough fuel gauge needle bouncing up and down which seems to correspond to the roughness of the rough idle. needle holds steady under acceleration also needle spikes if i shift back an forth between drive and reverse, drive spikes, reverse spikes, drive spikes and so forth. also the service engine soon blinks continuously steady.
Maybe your fuel injectors need a good cleaning??? Just a thought but try pouring a bottle or 2 of SeaFoam gas treatment in your gas tank next fill up at the pump... I swear by the stuff, it really smoothed out my ride.
 
  #4  
Old 01-15-2019, 06:04 PM
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go chevy: although i recently replaced the spider and poppets (fuel injectors), i will try the sea foam cleaning since it can't hurt.

cleburne red: im aware blinking service engine soon light might indicate severe misfire (it does indicate other problems) i am interested in answers for my other symptoms.

thank you both for your replies
 
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