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turboawdfanatic
Moderator
Joined: Tue Aug 14, 2007 2:39 pm
Posts: 3013
Location: La Habra
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 Strange misfiring issue Lately my engine misfiring/hesitating between 4k rpm and 5500rpm at WOT. This only happens at higher boost levels (18+psi). It doesn't seem to happen when I boost 15psi. Here's the weird part...the issue goes away after 10-15 minutes of driving. It only takes 2-3 min for the coolant to get up to OT, so I don't think its a warm up issue. I pulled the plugs and they look...okay. Not perfect, but okay. There's no excessive wear, but they're a little bit lighter of a color than a good plug looks like. Not *white*, but a ligher tan than a good looking plug. The wires have been in the car since I bought it a few years ago, but the resistance on them tested fine when I threw in the new engine last year.
Any thoughts before I start throwing new parts at it? I'll check the resistance on the wires again when I get a chance and update.
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| Thu Jul 02, 2009 1:26 pm |
 
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clockworktoy
Squish Face
Joined: Tue May 22, 2007 7:08 pm
Posts: 4327
Location: LBC
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Re: Strange misfiring issue What are your plugs gapped at?
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| Thu Jul 02, 2009 1:31 pm |
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Illeagle
Talon of Doom
Joined: Wed May 23, 2007 10:07 am
Posts: 3615
Location: Long Beach
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Re: Strange misfiring issue I've had perfect reading on wires but they'd arc out under load. +1 on whats your gap?
_________________1/4 ET-11.657@121.18mph w/ 1.682 60' 445whp/427tq on RRE Dyno All on 91 pump. Do you need your car tooned? Got some extra cash? PM me for details. I offer street and dyno tunes
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| Thu Jul 02, 2009 2:29 pm |
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turboawdfanatic
Moderator
Joined: Tue Aug 14, 2007 2:39 pm
Posts: 3013
Location: La Habra
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Re: Strange misfiring issue Good ol' .028". I might just have to throw in some new wires.
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| Thu Jul 02, 2009 2:57 pm |
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Illeagle
Talon of Doom
Joined: Wed May 23, 2007 10:07 am
Posts: 3615
Location: Long Beach
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Re: Strange misfiring issue close em down to .024
_________________1/4 ET-11.657@121.18mph w/ 1.682 60' 445whp/427tq on RRE Dyno All on 91 pump. Do you need your car tooned? Got some extra cash? PM me for details. I offer street and dyno tunes
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| Thu Jul 02, 2009 3:32 pm |
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turboawdfanatic
Moderator
Joined: Tue Aug 14, 2007 2:39 pm
Posts: 3013
Location: La Habra
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Re: Strange misfiring issue Will do.
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| Thu Jul 02, 2009 10:52 pm |
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4GRIDER
BANNED 4 LIFE!
Joined: Thu Apr 17, 2008 5:48 pm
Posts: 973
Location: San Fernando Valley
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Re: Strange misfiring issue _________________|DIAMOND-STAR-MOTORS||4G63T_RACING|
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| Fri Jul 03, 2009 2:58 pm |
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