Whats wrong with my engine?

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Jan 8, 2007 | 03:39 PM

PontiMANIac

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Whats wrong with my engine?

Under acceleration at 1/4 or 1/2 open throttle, the engine in my 2000 WS-6 seems to flatten out as soon as it hits 2500 rpm and continues to feel like I'm pulling a bus unless I increase the throttle. I have an m6 tranny and it doesn't seem to matter what gear I'm in although when driving it sanely I'm usually in 2nd or 3rd at the time it happens. It almost feels like the engine is retarding. Could something be activating the knock sensor? (Again under WOT there is no problem) Does anyone else have this happen? The engine has 59k miles on it and runs excellent so I don't know if this is normal or not but I don't remember noticing this issue when I bought the car 2 years ago.
The only mods are an SLP lid, Borla cat back, TB bypass, Diablo Predator tune. (Engine lag is noticible with stock tune or performance tune).
Please advise if you have any ideas.
Thanks.

Jan 8, 2007 | 03:51 PM

2001NBMZ28

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From: Jacksonville, FL

Are you getting any KR on the Predator?

Jan 8, 2007 | 03:51 PM

98Z28MASS

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From: Massachusetts

Sounds like at partial throttle your not getting enough fuel pressure? Id try swapping in a new fuel filter and then maybe see if an injector is clogged?

Jan 8, 2007 | 03:53 PM

ULTIMATEORANGESS

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when was the last time the plugs were changes? fuel filter? wires might be due if theyre original.

Jan 8, 2007 | 05:55 PM

Black02Bird

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i agree with both of them, i would try the fuel filter and injectors first... wires and plugs next

Mar 4, 2007 | 09:42 PM

Arcolog2

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I'd take your preditor, set your car back to stock tune and sell that thing as fast as you can....

Mar 5, 2007 | 10:14 AM

00BlueTA

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Quote:

Originally Posted by Arcolog2

I'd take your preditor, set your car back to stock tune and sell that thing as fast as you can....

Forget what he said, fix and keep your car!!!

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Mar 13, 2007 | 10:40 PM

football_dynasties

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Whats wrong with the predator?

Mar 14, 2007 | 12:19 PM

#10

2000badbird

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From: Jacksonville FL

nothing they work for stuff like gear changes and what not but they cant beat a good dyno tune for performance considering most tuners use ls1 edit and hp tuners which allow you to make changes for gears and removed emmision equipment aswell basicly you will get more out of a tune than with a hand held