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Post by coreydaniel on Aug 9, 2009 16:32:14 GMT -5
My car just started doing this. Its missing terribley under boost, past 13 psi or so. It is almost like its hitting the rev limiter. I have changed the plug wires out and it didnt help. I dont see anything wrong with the cap and rotor. Im thinking maybe the disrtibutor. I had the throttle body off, a vacum leak could cause this but i cant find one. Any thoughts?
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Post by Stinger on Aug 9, 2009 18:35:10 GMT -5
How old are your plugs? What brand and what's the gap?
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Post by coreydaniel on Aug 9, 2009 19:45:37 GMT -5
champions, they are about 6-7 moths old, gaped around 15 or so
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Post by 93turbopony on Aug 9, 2009 19:53:28 GMT -5
they should be gaped around .030
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Post by coreydaniel on Aug 9, 2009 20:16:07 GMT -5
it was running perfectly up until the other day, the plugs have been the same since i put the car together. I switched out the plug wires, distributor and cap and it didnt help.
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Post by Stinger on Aug 9, 2009 23:20:16 GMT -5
Plugs do wear out over time, champions aren't very good either...motocraft or autolite copper would be a better choice.
It could also be a fuel issue (plugged filter, weak pump, etc.).
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Post by coreydaniel on Aug 10, 2009 17:46:08 GMT -5
i hope its not the pump, it is only 6 months old, a walbro 255. I am putting new filter on with the new plugs, the plugs are gapped at 25.
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Post by coreydaniel on Aug 10, 2009 18:54:36 GMT -5
Plugs fixed it.
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Post by Stinger on Aug 10, 2009 19:44:52 GMT -5
What I expected...for the record, these cars are hard on plugs (because of the high boost and low gap) so it's pretty common to change them out every 6 months or so (less if you put a lot of miles on it and the tune isn't perfect). It's always the first thing to check when it starts sputtering.
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