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Radix truck... mis-firing.. Please help

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Old Dec 10, 2005 | 03:49 AM
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could also be running lean. changed the fuel filter lately?
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Old Dec 10, 2005 | 05:37 AM
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So...you got a misfire code? Do the wires, and at least look at the plugs.
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Old Dec 10, 2005 | 06:12 AM
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Originally Posted by j's01silverado
You think I should change them if they only have 5,000 miles on them and less than a year old. They are TR-6's in case you wanted to know.

https://www.performancetrucks.net/fo...d.php?t=354146



check this thread out.... they say that the tips of the spark plugs come loose every once in a while and makes the vehicles run like ****...
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Old Dec 10, 2005 | 06:30 AM
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I know this dont mean nothin but I had the EXACT same symptoms after I did a converter swap said screw it and did a cam swap after tha had no problems could be somthin cam related IDK but after the cam swap didnt have those problems but I had those same symptoms as you are describing.
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Old Dec 10, 2005 | 08:18 AM
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If the wires are good change the fuel filter,it's under the truck about where the drivers seat is,a little messy so have a shop rag ready.Radix is sensitive to fuel pressure.If the fuel filter doesnt do the trick check the fuel regulator.
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Old Dec 10, 2005 | 09:08 AM
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I think it might be a cracked sparkplug from the last install,you should have a fuel pressure gauge on it for testing.
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Old Dec 10, 2005 | 09:22 AM
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I see TOG headers in your sig. Are they fairly new? Any chance you bumped a plug during the install? I had the same misfire symptoms as you after a header install. It was a plug (or two) and changing them fixed the issue. As said above, plug wires could do the same thing.

With that code P0300 code, someone with scanning software (or a dealer with a TECH2) should be able to tell you what specific cylinder is having the most misfires. If its isolated to mainly one or two cylinders, swap plugs and wires and I bet its solved. If the misfires are evenly spread out among all cylinders, then you likely have a fueling issue. Look to the fuel filter, the radix fuel regulator, and the inline pump for possible causes.

Post up your your findings when you get it solved. Good luck.
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Old Dec 10, 2005 | 12:42 PM
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Okay, I took the truck for a ride with the scan tool. When I looked into the hstory of the misfire codes, they were all evenly spread out. From 20-40 codes per cyclinder, something like that. When the truck idled, it did not see any misfiring in any of the cylinders.
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Old Dec 10, 2005 | 12:44 PM
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Originally Posted by BigTex
I see TOG headers in your sig. Are they fairly new? Any chance you bumped a plug during the install?

If the misfires are evenly spread out among all cylinders, then you likely have a fueling issue. Look to the fuel filter, the radix fuel regulator, and the inline pump for possible causes.

Post up your your findings when you get it solved. Good luck.
TOG's have been on for almost 2 years.

Im going to run a fuel pressure guage on it and see what that looks like. What should it be at relative to the rpm range.

Will post back.
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Old Dec 11, 2005 | 08:04 AM
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update???
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