[A26B]

Originally Posted by fastpace

Is it really that common of a failure? I'll have to do some research on common failure mode, if a cleaning and flow test would work. Almost $800 for a new set of injectors seems like a big "just in case" bill. ......................

The common failure of injectors for 90~92 MY is due to ethanol. Most pump fuel in the US contains 10~15% ethanol blended with gasoline. The solenoid windings in the 90~92 injectors are not compatible with ethanol, which breaks down the varnish insulation, allowing short(s) in the windings. The breakdown is evidenced by low resistivity and misfires.

Cleaning does nothing for the problem. Flow testing will cost 50% or more of the cost associated with new injectors and also offers nothing in return to combat the problem. The correct solution is to replace all 16 injectors with new ones (not from GM or ACDelco old stock).

So, it's not a "just in case" but more like a matter of when, unless you are able to use only 100% gasoline.