P0304 misfire cylinder 4
#1
P0304 misfire cylinder 4
I have had this as a flashing MIL and just the other day i came as a solid light. I am about to pull my hair out over this. I have changed all the injectors and plugs wires. no need to change cooil packs because I have swaped holes on them and the misfire still remains with cylinder 4. I have also checked the compression and all cylinders are within 2-5 lbs of each other. This is a 98 T100 with 182000 on the clock. The only thing I think it could be is the new injector that was put on #4 was also bad but what are the chances of that happening? also could be a valve clearance out of spec but I am at a loss. anybody got any ideas?
#3
Yes it's a 5vz. Yes I swapped plugs, I actually put new ones in. Yes I've already swapped coil packs with another cylinder. compression reading on 1-5 were 200. compression on 6 was 185. No I have not checked valve clearances. I put new injectors in it.
#5
Did you perform any maintenance prior to this condition? Maybe you bumped/damaged the injector harness?
What did the #4 spark plug look like after the condition appeared? Was the end wet with fuel?
What did you do to test to see if the injector was gitting the proper signal/voltage?
Also...as a quick check...you do know that the #4 cylinder is on the left side of the engine aka the driver's side.
What brand of wires do you have on there? What is the current resistance measurement of the #4 wire? It's possible that the wire may have failed even though it is new. Did you confirm that the plug is firing?
What brand/model of spark plugs do you have in there?
What did the #4 spark plug look like after the condition appeared? Was the end wet with fuel?
What did you do to test to see if the injector was gitting the proper signal/voltage?
Also...as a quick check...you do know that the #4 cylinder is on the left side of the engine aka the driver's side.
What brand of wires do you have on there? What is the current resistance measurement of the #4 wire? It's possible that the wire may have failed even though it is new. Did you confirm that the plug is firing?
What brand/model of spark plugs do you have in there?
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