toyolla86

so i have been troubleshooting this stupid car for months now.
it used to run fine when cold, then once warmed up it would start missing. now it misses even when cold.
symptoms:
the gas mileage has progressively gotten better (24mpg and now 26.9 mpg)
it started after one of my spark plugs popped out and the engine shook like crazy still i put the plug back in.
it seems rythmic. not really too random. so it seemed like it was only one cylinder doing it. maybe 2 cylinders now.

things i already tried:
i replaced the iacv... no change.
i replaced the little spark thing inside the dizzy.... no change.
i replaced spark plugs... no change
i rebuilt injectors... no change. (although i am still pointing towards them)

things i think it may be:
some vacuum leak
a sensor i dont know about
fuel filter
fuel pump


the fact that the mpg is being affected makes me think that something in the fuel system is clogging up and starving gas which is saving me gas.
anyone have any insight? thanks

holmesnmanny

spark plug popped out or spark plug wire popped out ?

Common sense says if your spark plug wire pops out you need to ditch those cheap wires and get real wires from NGK or Denso

toyolla86

spark plug popped out of head

holmesnmanny

run a compression test to see how the cylinders are

remember to remove the "ecu" fuse in the engine bay to disable spark and fuel