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Low rpm miss


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My truck had a sporadic low rpm miss while under load. Above 1500 rpm or so its fine. Plugs are ...



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Old 08-22-2017, 04:47 PM
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Low rpm miss

My truck had a sporadic low rpm miss while under load.
Above 1500 rpm or so its fine.
Plugs are clean and it seems to run better when cold.
Anyone experiencing a similar miss???

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Old 08-22-2017, 10:44 PM
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Bad wire ?
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Old 08-23-2017, 02:38 PM
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Are you seeing tach jump when it misses? Could just the warm temp timing being pulled and associated change in engine sounds. Otherwise could be injector or plug wire.
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Old 08-24-2017, 04:40 PM
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The tach is steady but you can feel the roughness when its pulling. It never set off a code tho. Occasionally it will backfire in the intake thats why I thinks its going lean.
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Other toys
1965 GTO 455SD, Tri-Power, 4 Speed, 4:56, O.C.I.R. Drag Racer.
1941 Willy's Pick Up
Front Engine, Supercharged 296 3/8 X 3/8's Flathead Ford Nostalgia Dragster "Bad Moon Rising".
1976 Charger, 460 Ford, Jacuzzi Jet Boat.
Drag Racers Horsepower Moto;
"If Some is Good,And More is Better, Then Too Much is Just Enough"
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Old 08-25-2017, 08:04 AM
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Quote:
Originally Posted by 500H V10 View Post
The tach is steady but you can feel the roughness when its pulling. It never set off a code tho. Occasionally it will backfire in the intake thats why I thinks its going lean.
Sounds like a bent or sticky valve boss. Possibly anyways
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Old 08-25-2017, 11:53 AM
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What kind of plugs are you running?
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Old 08-25-2017, 10:05 PM
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When I first got my truck it would do that , it would studder and miss on a hard launch, replaced the plugs and it went away
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Old 09-06-2017, 04:39 PM
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Plugs are new. I get some backfiring in the intake like its going lean but no codes.
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2004 Ram SRT-10 Flame Red #1105 of 3057 and 1 of 1040 Flame Red
Other toys
1965 GTO 455SD, Tri-Power, 4 Speed, 4:56, O.C.I.R. Drag Racer.
1941 Willy's Pick Up
Front Engine, Supercharged 296 3/8 X 3/8's Flathead Ford Nostalgia Dragster "Bad Moon Rising".
1976 Charger, 460 Ford, Jacuzzi Jet Boat.
Drag Racers Horsepower Moto;
"If Some is Good,And More is Better, Then Too Much is Just Enough"
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Old 09-06-2017, 08:47 PM
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Quote:
Originally Posted by 500H V10 View Post
Plugs are new. I get some backfiring in the intake like its going lean but no codes.
Valve boss or pushrod
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Old 09-08-2017, 09:59 AM
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compression check......quickly............before there is more trouble.....
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