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High boost misfire. Help

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Old 07-10-2012, 04:31 AM
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It's a pretty big nozzle on the meth too. Does the ef series just mean non protruding?
I'll agree the plugs look like ***. But like I said they were really old. Probably tons of water meth build up or something. I'm not sure. I'm going to switch back probably this weekend and see what it does. I'll locate the br6ef's just to be sure I don't have to order them.
I'm going to go back before I change anything in the tune. Plugs are WAY easier than an entire remap. Lol
Old 07-10-2012, 06:36 AM
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The TR6 and the BR6EF are the same except one is projected and the other is standard. Same heat range.

I would say that your plugs are not like that from the meth, if anything water meth should make everything cleaner. Maybe I am wrong, what ratio did you run?
Old 07-10-2012, 10:25 AM
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Originally Posted by TURBHOE


Whats up with the green tint on these?
couple of my TR6's had that too!
Old 07-10-2012, 11:24 AM
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lean cruise causes that. not sure why but my silverado had the same thing once i leaned out the cruiseing rpm's.
Old 07-10-2012, 08:56 PM
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Is it still misfiring or is it just low on power?
Old 07-11-2012, 07:55 AM
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just real lo on power. takes for ever to pull through third gear. and my injector pulse width stayed about the same from 4000-6000 rpm. went from 65 to 67 through out third.
Old 07-11-2012, 08:08 AM
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Your injector duty cycle is not dependent on your plug heat range. It should have climbed more then that for that rpm range.
Old 07-11-2012, 08:22 AM
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Originally Posted by TURBHOE
lean cruise causes that. not sure why but my silverado had the same thing once i leaned out the cruiseing rpm's.
Ah, that explains it..
im putting the 7's in when i do the turbo, hopefully they behave.
Old 07-11-2012, 01:41 PM
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Originally Posted by 03sierraslt
Your injector duty cycle is not dependent on your plug heat range. It should have climbed more then that for that rpm range.
correct, but if its not making power the the injector won't need to spray in mor fuel. kinda hang if you will.
Old 07-11-2012, 03:26 PM
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I had something similar happen to my truck a few months ago and it turned out that I had some bad injectors. They actually worked well/ok certain times and then worked like absolute crap and then not at all at other times. Not sure if that's helpful at all but it could possibly be the injectors.


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