LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Wtf help.

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Old Aug 29, 2010 | 06:00 PM
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Default Wtf help.

I have a rebuilt cc503 lt pacesetter. 96 lt1. After getting it dynoed my tuner suggested to run ngk tr55. I had the Bosch quad prong style ones. The best they offer. He suggested that due to my power curves dropping. Well I switched them this morning and gaped them at .035
At first it ran decent but not better than before. Then after me starting it up again once I got home I had a nasty miss. If I power braked it the rpms went up and down. 800-1000 and driving it sounded like ****. I checked every plug wire 3 times now. I'm gonna check for arching in a bit but idk what happened. I guess I'm going to pull them out and make sure there not broken. Any suggestions on what to do before I remove them?
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Old Aug 29, 2010 | 06:07 PM
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I run the same plugs but gapped at .050 and I have never had a problem. Are you sure all the wires are on the right plug?
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Old Aug 29, 2010 | 06:14 PM
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Yea of course! It'd be back firing up the *** if they were switched. Whatever it is it starts running really bad and then after 5 min of playing with it, it stops. But i can feel it like coming and going before it actually stops But I can still hear a slight miss.
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Old Aug 29, 2010 | 06:23 PM
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.035 sounds to tight for the gap.. sparks probably getting shrouded some.
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Old Aug 29, 2010 | 06:28 PM
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Damn really? That's what the owner of nitrous outlet and my tuner suggested :0 moe Bailey known as moehorsepower.
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Old Aug 29, 2010 | 06:42 PM
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yes
a small gap and a sparkplug at a bad indexed position could cause a slight miss. basicly not getting a good spark in the cylinder..
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Old Aug 29, 2010 | 07:08 PM
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But why would these guys who have been doing this for 30 years say that
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Old Aug 29, 2010 | 07:22 PM
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But it's back and forth. As if a wire was breaking down or something. If it was constant then that'd be understandable. Unless the white material is broken then idk :/
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Old Aug 29, 2010 | 07:24 PM
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I just drove it and it was running strong! Yet the idle was choppy and it didn't as smooth. This is weird.
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Old Aug 29, 2010 | 07:38 PM
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try opening the gap up to .050 or .055 and see how it acts..
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Old Aug 29, 2010 | 08:26 PM
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I ran Bosch +4 plugs for 6-7 years on the orignal plug wires with no issues. I developed a miss and I changed to tr 55's and MSD 8.5s. A year later same miss so I went back to the Bosch + 4 a year ago, I've never had an issue with them.
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Old Aug 29, 2010 | 10:05 PM
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I ran tr55's for a long time without issues. I gapped mine at 45 though.
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Old Aug 29, 2010 | 10:31 PM
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ya dont run lat,s in a nitrous motr . the tr55,s are a resistor plug are u sure you didnt accidently close the gap on the plug on install thats a classic case of it .
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Old Aug 29, 2010 | 11:28 PM
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I run my TR55s at .035" and put down 455whp. Nothing wrong with that size gap with those plugs.

I should also add that this is REAL LIFE EXPERIENCE, NOT INTERNET HEAR-SAY.
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