Question about 1995 GMC Sonoma

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Ran it 1.5 hrs idling now chugs at low rpm - 1995 GMC Sonoma

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This may be due to a dirty throtlebody or bad idle air control valve, using crab cleaner clean the butter fly plate or also called the throtle body plate, spray area and clean with a toothbrush and this cleans it good, make sure to open the plate and clean both sides and housing, when restarting you may need to hold gas pedal down to get it going and clear it out, with thew engine running spray cleaner into the idle valve hole, rais eidle a little and spray a few times, the last thing is if the low idle is due to a misfire like its skipping then you may have a bad wire, (sparkplug wire) but clean throtlebody also, hope this is helpful to you and good luck.

Posted on Nov 10, 2010

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