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Misfiring around 7000rpm

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Old 04-09-03, 08:25 PM
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Misfiring around 7000rpm

Hello people!

The car misfires at about 7000rpm, at least it feels like it. It backfires and complete loses its power, than aften half a second it continue to pull all the way to the rev limter.

Any one have any ideas?
Old 04-09-03, 08:51 PM
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Two things come to mind and sorta go hand in hand - you're running too rich and/or you need new plugs/plug wires. What are your mods?
Old 04-09-03, 09:25 PM
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Fuel cut if you have the stock ECU. I would happen to me at 9 lbs of boost or higher.

Jon
Old 04-10-03, 02:14 AM
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I had 5-6k hesitation from running too rich... I installed an HKS twin power ignition amp and it cleared things right up.
Old 04-10-03, 10:20 AM
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Mods are Greddy Power evolution 3.7" exhaust with 3" downpipe...!

What kind of fuel preassure do you recomend, it has have a adjustable regulator
Old 04-11-03, 02:16 AM
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Try 38 lbs at idle with a rising rate regulator . Change your plugs and check your plug wires. Call Garfinkle and get a torque brace, if you are going that high in RPM.
Old 04-11-03, 10:18 AM
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PLUGS, PLUGS, PLUGS! or fuel filter.
Old 04-11-03, 02:10 PM
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What kind of plugs do you recomend? NGK #?

Plugwires are brand new J-spec wires of some kind... The engine got flown from Japan to Norway 1 month ago
Old 04-11-03, 02:11 PM
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Originally posted by duboisr
Try 38 lbs at idle with a rising rate regulator . Change your plugs and check your plug wires. Call Garfinkle and get a torque brace, if you are going that high in RPM.
38lbs is how many kg/bar?
Old 04-11-03, 09:51 PM
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Come on now, we gave you enough help regarding your car; do we need to do your math homework too?
Old 04-12-03, 12:37 AM
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Originally posted by Marius
What kind of plugs do you recomend? NGK #?
Plugs are BUR7EQP and BUR9EQP stock. I replaced mine with BUR7EQ and BUR9EQ without any troubles.
Old 04-12-03, 01:22 AM
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BUR9EQ all the way around. im sure that the platinums are better for longetivity but copper is a better conductor. i used to work at kragen and my buddy still gives me a really great price. cant beat 2.50/plug and in stock. PLAT are like a week order and i can get them for around 8-10 bucks. just easier to go with the Cu, and dont forget to go 9"s all around.
kris
Old 04-12-03, 02:12 AM
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Are you still running the stock ECU? It sounds more like a fuel cut rather then a misfire.
Old 04-12-03, 05:11 AM
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Originally posted by neevosh
Are you still running the stock ECU? It sounds more like a fuel cut rather then a misfire.

Yes its the stock ECU! Now that i have installed a boost gauge I think its the fuel cut thats giving it a hard time...! Time to get a boost controller...
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