yes i did a injecter bleed down ,all checked above specs and plug is new and not fouling out .the misfire seems 2 happen more when i accelerate and decelerate. the check engine light comes on then goes off when the vehicle sits at idle.

fortknoxx wrote:any aftermarket accessories installed on this vehicle? like satalite radio, remote starter? are anyother dash lights or gauged acting up?

only accessories are a two way radio for communication, other than that everythings stock.

we have a 02 gmc yukon xl k 1500 with misfire problems, the coils for 3,7,5,6 and 1cylinders hav been replaced before with the vehicle coming back with the same problems.the oxygen sensors hav also been replaced along with plugs and wires,both knock sensors,with harness. the vehicle has 107526.3 act...

Fuel level guage will work for about 2 minutes then gauge will drop 2 empty on a 1997 GMC 3500 with a 5.7L. I replaced fuel sending unit, balance pump, I P, fuel pump and checked all grounds.

Any suggestions?