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Fuel additive gone wrong. Please help!
After completing a routine oil and filter change I decided to use a brand x fuel additive. The type you dump into your fuel tank supposedly cleans fuel system
injectors etc. Shortly there after my truck developed what I would consider a miss-shutter. The service engine light when on soon after that. For a corrective measure decided to change out fuel filter, PVC, spark plugs. Also tried to burn up most of the suspect bad gas in the fuel tank.
Well, all my efforts where to no avail. Any thoughts form this board to my current problem would be greatly appreciated. ;-)
Follow up went out and bought an Actron code reader the code stored in the computer was code 300 random/multiple cylinder misfire detected. I have pretty much checked all the obvious stuff what would the chance be this could be a faulty fuel pump.
Sounds like plug wires or coil/coils gone bad to me. What engine do you have? My 99 5.4l started having a miss and it ended up needing a new plug, wire and coil. The 5.4 has individual coils. I don't see how a fuel additive could cause lingering ignition problems. Maybe an exhaust sensor problem. But your code reader should indicate if an emission sensor is shot. WIth new plugs, I'd be looking at the wires or coil/coils.
Thanks for your reply. My truck has a 4.6L engine the spark plug wires are the original and the truck does have 83k miles on it. I guess at this point it would not hurt to replace the wireset and check the coil packs. thought this might have been a fuel related problem at first since it did start with the miss and stumble shortly after the fuel additive was added to the fuel. well at least its a new direction to start over in ;-)