Question about 1992 GMC Sonoma
That's a classic symptom of a stretched timing chain. Generally you won't have that happen 'till you reach around 175K or more miles. Could also be a variety of other computer control problems but I'd bet on a chain.
Posted on May 20, 2011
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Posted on Jan 02, 2017
There are a couple of known things to check.
Check connector C134 it is under the hood right below the driver's side headlamp.It is a 42 pin connector with either an 8mm or 10mm bolt in center of it.Take it apart and inspect it for moisture and corrosion.Clean it and add some dielectric grease to the terminals then reconnect it.
Also open drivers door and remove the drivers side lower kick panel.
You will see a 20 pin connector there and also the central junction box.Disconncet the 20 pin connector and the 2 connectors to the central junction box and inspect them for moisture and or corrosion and clean them and add dielectric grease and see if this fixes you problem.
Posted on Feb 20, 2009
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