missing at high boost and RPM's, help...
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Registered User
Joined: Mar 2005
Posts: 14
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From: North Alabama
missing at high boost and RPM's, help...
Hey guys,
need some help....2001, Eaton @16 psi, pullies, K&N cool air kit, KB big oval TB, C&L intake, KB switch chip, flowmasters with no cats, Denso irridium plugs and a newly added KB boost a spark.
At WOT when the truck gets to about 4,000+ and 10 psi+ the truck feels like it starts missing. Under normal conditions it runs fine and even pulls good with 3/4 throttle. I think the boost a spark quit working but not sure. Has anyone out there had this problem or heard of it? No other problems with the truck...Any ideas? Is there a vaccum line or sensor that could cause this? The service engine light is not on and all guages read normal. Any help would be great. Thanks.
need some help....2001, Eaton @16 psi, pullies, K&N cool air kit, KB big oval TB, C&L intake, KB switch chip, flowmasters with no cats, Denso irridium plugs and a newly added KB boost a spark.
At WOT when the truck gets to about 4,000+ and 10 psi+ the truck feels like it starts missing. Under normal conditions it runs fine and even pulls good with 3/4 throttle. I think the boost a spark quit working but not sure. Has anyone out there had this problem or heard of it? No other problems with the truck...Any ideas? Is there a vaccum line or sensor that could cause this? The service engine light is not on and all guages read normal. Any help would be great. Thanks.
Member
Joined: Dec 2004
Posts: 20
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From: Atlanta, GA
For what it's worth, I had the same problem on my stock '03. It was under warranty, so I took it to the dealer. They said that I had 1 bad spark plug, replaced it and it's run great since. So, maybe check the plugs first?
Senior Member
Joined: Apr 2001
Posts: 5,939
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From: Warner Robins, Ga, CSA
Welcome to the forum fm!
One of the symptoms of a partially clogged fuel filter is a miss(if not a shut-down) at or near WOT. I'd surely change that out before I tackled a plug change. With it partially clogged, enough fuel can flow for lower throttle openings but not enough for WOT.
Dan
One of the symptoms of a partially clogged fuel filter is a miss(if not a shut-down) at or near WOT. I'd surely change that out before I tackled a plug change. With it partially clogged, enough fuel can flow for lower throttle openings but not enough for WOT.
Dan
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Registered User
Joined: Mar 2005
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From: North Alabama
Thanks
Thanks for the input. The plugs and the fuel filter is new, put in about a month ago. I will check those, maybe its just a bad plug. The boost-a-spark would be a pain in the butt to pull out and send off. If it was a bad plug would I get an engine light (missfire code)? I have Denso irridums and they aint cheap, I'll be dissapointed if one has already **** the bed...Thanks.