2002 Silverado 5.3 missing and low power

5

Asked by Jun 19, 2017 at 08:54 AM about the 2002 Chevrolet Silverado 1500 LS Ext Cab Short Bed 4WD

Question type: Maintenance & Repair

Truck has 185,000 miles and check engine light has been randomly coming on for about 3 years then last week it started flashing and I noticed the truck was low on power because of a miss.  I figured it was time for a set of plugs and wires anyway so I put them in and it's doing the same thing.  I pulled the codes and found a P0300.  Fuel pressure holds 52.  I have tried to determine which cylinder it is missing on and it seems that all 8 are firing.   sprayed ether all around the intake to check for leaks and that did not change the way it runs.  I have looked at all the vacuum hoses that I can see.  I did fill it up with gas right before it started this, I am thinking maybe I got a bad tank.  I've always  ran ethanol free in it.

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