What can cause this???
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TECH Resident
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Joined: Jul 2006
Posts: 846
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From: San Fernando Valley, CA
What can cause this??? Well my car was running like **** but I've finally been coming around fixing her up little by little. The tranny went out so I put in a built one and while the guy was putting in the tranny he let me know of a big oil leak from behind the motor. He also let me know that the car was throwing a code for "random misfire in cylinder #7." Now I took the car to my mechanic and he fixed the oil leak by replacing some sort of gasket behind the motor and I was wondering if that leak somehow caused the misfire???? The car has been running great but that has stayed on the back of my mind and was wondering what it could possibly be 
I did a tune up to the car a couple months back and I'm thinking the bastard probably didn't change the #7 plug 
Any help is appreciated 
I did a tune up to the car a couple months back and I'm thinking the bastard probably didn't change the #7 plug Any help is appreciated 
Unless the #7 spark plug was trashed for some reason when they changed the plugs, it should still run fine with one old plug in there. Alot of times when mechanics do plug changes they put the wires back on and leave one or more of them touching the exhaust manifold piping.
Make sure that none of the wires are touching any metal AT ALL. That will cause mifires.
Also, of course, make sure the plug wires are snapped on the plug and the coil properly.
Might be a broken spark plug too, or a bad wire. So maybe after trying the things above, then try swapping wires to see if the problem follows the #7 wire.
Could be a bad #7 fuel injector too.
.
Make sure that none of the wires are touching any metal AT ALL. That will cause mifires.
Also, of course, make sure the plug wires are snapped on the plug and the coil properly.
Might be a broken spark plug too, or a bad wire. So maybe after trying the things above, then try swapping wires to see if the problem follows the #7 wire.
Could be a bad #7 fuel injector too.
.
