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Gti motor feeling flat around 4000rpm

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jonno_racing

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Joined: Wed Apr 15, 2009 11:30 pm
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Location: Tassie
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Posted: Thu Jan 14, 2010 5:08 pm

ok i cant sort out this issue...

my motor feels "FLAT" around 3700-4100rpm

dosnt matter full throttle or less.. it dosnt die, just looses power, still acelerates...

i am just stuffed if i can work out why!!

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jonno_racing

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Posted: Thu Jan 14, 2010 5:09 pm

the timing is set at around 8's and, has new plugs and leads etc...
it dosnt miss, it just runs out of power... just feels flat

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atari4x4

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Joined: Mon Dec 11, 2006 10:30 pm
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Posted: Thu Jan 14, 2010 5:15 pm

have you got a VSS sensor hooked up?

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jonno_racing

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Posted: Thu Jan 14, 2010 5:55 pm

mk1 gti's dont run a vss

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ninjadaniel

Joined: Sun Jun 07, 2009 11:30 pm
Posts: 365
Location: Brisbane

Posted: Thu Jan 14, 2010 6:33 pm

sounds like an ignition problem to me, u said new leads... try other ones? check that plugs are right ones? you have probably already done this.

Scrawny

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Joined: Tue Jan 29, 2008 10:30 pm
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Location: Brissie
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Posted: Thu Jan 14, 2010 6:35 pm

I would be looking at fuel. Check pressure whilst driving, check/change filter, check pump and lines, etc....

jonno_racing

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Joined: Wed Apr 15, 2009 11:30 pm
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Posted: Thu Jan 14, 2010 9:00 pm

well after looking at it for a hour or so... checking for vacume leaks etc..

it turns out.. it has melted the eletrde in #4 spark plug!! eek

thats fixed but i have no idea why it did that!

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atari4x4

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Posted: Thu Jan 14, 2010 9:22 pm

jonno_racing wrote:

mk1 gti's dont run a vss

ahh cool, i've seen some weird stuff go on when there was no VSS signal. :oops:

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jonno_racing

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Posted: Thu Jan 14, 2010 9:59 pm

well i found the reason it melted a plug

the new leads i bought.. where it go's though the rocker cover on2 the plug was about 10mm to long, so it has never been sitting corectly on the plug, so off with 10mm on the bottom, now it sits spot on!

all is good with the world now

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