Misfires dont know where to go

87hilux7mge · 07-07-2011, 08:48 AM

are you sure this is a "misfire" and not a straight up "miss"? a misfire would indicate improper timing of some sort.

im gonna assume you have an N/A, cuz of the cap and rotor comment. check to see if your cap is cracked, has moisture inside, if wires are faulty etc. even new stuff can be bad.

next, if you have oil on your plugs, how much? if its alot, might be a bad valve seal. a compression check and leak down test could help identify where the oil is coming from and if its enough to cause the misfire.

fuel system would be next on my list, checking to see if an injector is opening/closing, etc.

post back with some more info, try to help ya as much as possible.

07-07-2011, 08:48 AM	#2
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	are you sure this is a "misfire" and not a straight up "miss"? a misfire would indicate improper timing of some sort. im gonna assume you have an N/A, cuz of the cap and rotor comment. check to see if your cap is cracked, has moisture inside, if wires are faulty etc. even new stuff can be bad. next, if you have oil on your plugs, how much? if its alot, might be a bad valve seal. a compression check and leak down test could help identify where the oil is coming from and if its enough to cause the misfire. fuel system would be next on my list, checking to see if an injector is opening/closing, etc. post back with some more info, try to help ya as much as possible. __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.