
04-08-2007, 03:51 PM
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CC Member
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Join Date: Aug 2003
Location: San Diego,
CA
Cobra Make, Engine: BDR #455, KC427W, TWM-FI
Posts: 727
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Not Ranked
Sounds like a vacuum leak. You said it started after a washing and comes on stronger the harder you hammer it. I think you have a vacuum leak that is casing one (or more) cylinder to go lean and not fire. At idle you won't notice it when there is no "suck".
Do you have a break boost line? this would be the first line and fittings I would check.
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