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Cylinder 6 Misfire ?

 
  #1  
Old 11-08-2005, 08:17 PM
96Broncowner
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Cylinder 6 Misfire ?

On the way home from a long trip this past weekend my 96' 5.8 started to misfire while climbing up a large hill. At the top it corrected itself and was smooth for the rest of the 130 mile trip. The check enging light came so I had the codes pulled and it was a Cylinder 6 misfire. I had them clear it and it has not come back on since. I have not been driving the beast as regularly due to gas prices. I have replaced the cap, rotor, factory wires and plugs within the past 9000 miles and the old girl still runs smooth as silk. Should I look deeper or could this be a one time thing? Any suggestions are appreciated.
 
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Old 11-08-2005, 08:31 PM
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I wouldn't worry too much about it unless the problem rears its ugly head again. Since the truck is sitting longer between runs, the fuel will take on moisture (in the form of water from humidity) while in the tank. The injectors themselves could be getting some varnish or tar buildup on them. A sticky injector can cause a misfire. Run a good quality fuel injector cleaner(i.e. Lucas Fuel Injector Formula) and fuel system dryer(i.e. HEET) through it next time you fill up and see if there is any noticable change in performance. Put the FI cleaner in first them fill the tank. This will mix it throughout the tank of fuel so the cleaners will continue to work and remain in the fuel since the truck sits for extended periods of time.

In the unlikely event that the problem does return after the above is exercised, start by checking the electrical connection to the injector that is being affected. But, as I said, I wouldn't worry too much unless the problem persists.
 
  #3  
Old 11-08-2005, 08:41 PM
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Thanks streak, I will rest easier and follow your quick tune up advice. I was on the shores of Superior in the and we had some wicked fog that night. I only had 1/2 tank when we took off the next morning. I bet your moisture diagnosis is right on.
 
 
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