1996 4runner cylinder 6 misfire

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  #1  
Old 05-03-08, 06:27 PM
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1996 4runner cylinder 6 misfire

I have a 1996 4runner 4wd that have a cylinder 6 misfire. I have changed spark plugs and wire and #6 fuel injector but problem still there. I have swapped coil packs too. I have used fuel injecotr cleaner and switched to super unleaded gas but none worked. don't know what to do next.
 
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Old 05-03-08, 07:01 PM
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Are there any trouble codes, i.e. check engine light?

I would have a compression test done to try and eliminate a bad gasket on the intake manifold.
 
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Old 05-03-08, 08:23 PM
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I would have a compression test done to try and eliminate a bad gasket on the intake manifold.
Agreed.....If compression Test comes back acceptable, Locate the vacuum leak. Manifolds can leak vacuum, as can a bad brake booster......

Hint.......A vacuum leak will affect the closest cylinder, so look for pinched , burnt, or otherwise damaged hoses at the BACK of the manifold.
 
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Old 05-03-08, 09:02 PM
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1996 4runner

there is still an engine light on and i pulled a p306 code ( cylinder 6 misfire ) on my obd. compression test was done on all cylinders and passed. both gaskets on intake manifold also been replaced. i will check any vacuum leaks / pinched airlines but if anybody can give more suggestions / troubleshooting technics, i will greatly appreciate it.
 
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Old 05-04-08, 03:09 AM
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How is the injector connector?. Make sure it clean and tight fit, they get really hot under the manifold, some of them breaking off when engine is running especially the 5 and 6.
 
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Old 05-04-08, 12:14 PM
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1996 4runner cylinder 6 misfire

thank you everybody for all your help, will now check my connections and leaks.
 
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Old 05-04-08, 12:43 PM
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Could be a totally clogged injector, too, like the one in my favorite injector picture ('96 Corsica):



This was a #6 cylinder, too (end of the fuel rail run).
 
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Old 05-04-08, 01:28 PM
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John,

He said he replaced the injector in his first post. ;p

That is one nasty lookin injector though..,
 
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Old 05-04-08, 02:07 PM
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1996 4runner

I have checked airlines for leaks and none found. Have reseated #6 fuel injector power connector and none seems to work. I'm at the end of the road, I think it is time to take it to a mechanic.
 
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Old 05-04-08, 02:38 PM
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My bad. Eyes must be going; I didn't even catch that after the reminder when I just went back and reread it. Took me two re-reads to see it!!!
 
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Old 05-04-08, 07:36 PM
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did you try a noid light in the No 6 injector wire connector?
also try useing a propane torch with a vac hose hooked up instead of the flame difuser to place propane in the areas around the intake and head sealing area to check for vac leaks. this will help isolate vac leaks especially if you use a short piece of steel brake line (about 12in.) to help you to pinpoint placement. works much better than squirting oil on the surfaces.
remember murphy was an optimist.
 
  #12  
Old 05-04-08, 09:14 PM
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1996 4runner

yes, i have used a noid light and it was blinking on cylinder 6.
 
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Old 05-05-08, 06:07 AM
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Could a bad camshaft position sensor do this?
 
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Old 05-13-08, 07:57 PM
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Turned out the problem was a loose wire on injector 6. Thanks everybody for all the help.
 
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