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MazdaSpeed 3 - Engine, Transmission & Driveline Discussion of engine, tranny and drivelines.


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Old 04-29-2010, 11:22 AM   #121

 
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Backing up the part throttle stuff, my car only has a mazdaspeed cai and catback(useless) but I have observed severe knock under part throttle several times in 4th and 5th gear. This could be triggering the failures.(but may not be the underlying cause) I have been trying to log it for awhile but have been unable to cause it while logging. I have noticed however that the fuel pressure is allowed to fall down to below 800psi if the speed is low enough and the load is light. I think the knock I am observing may be result of this low fuel pressure combined with an error in the ecu that doesn't properly increase the fuel pressure in response to a sub-WOT input. This would be made worse by increasing the power output and wouldn't be solved by a better pump since the ecu would be keeping the pressures low.
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Old 04-29-2010, 11:25 AM   #122
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Old 04-29-2010, 02:38 PM   #123
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Old 04-29-2010, 02:45 PM   #124
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Old 04-29-2010, 03:26 PM   #125
 
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Old 05-12-2010, 10:39 PM   #126
 
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I don't know what's worse...the fact that this thread is somehow still alive or that Tricky went through and read all the posts and groaned at every one of my posts...without explaining how I'm wrong. My feelings aren't hurt...I just want to know the base of your claims. You're the only one proving yourself wrong right now.

But it's just a forum...where everyone can be a fucking rock star/engineering genius-even if only for a minute before being set on fire by the audience...

Okay...back to the Volkswagen.
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Old 05-12-2010, 10:40 PM   #127
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groaning r t3h best
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Old 05-12-2010, 10:43 PM   #128
 
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Originally Posted by phillyb View Post
groaning r t3h best
Awesome! I'm 3 for 3 with them!

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