SRI-LEE
Member
Registered: 16th Feb 08
Location: kendal
User status: Offline
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as title and where as it used to have power kick in at 3000rpm now nothing happens its like its restricted you put your foot down and it just feels flat but when revving in neutral its spot on anyon else had this problem? thanks lee
[Edited on 29-03-2009 by SRI-LEE]
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SRI-LEE
Member
Registered: 16th Feb 08
Location: kendal
User status: Offline
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iv still got the standard air filter on would this be the problem as its wanting to suck more air in faster at higher revs but the standard air filter cant give the required amount??
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Ricky352
Member
Registered: 6th Apr 07
Location: Lisburn, N.I.
User status: Offline
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Wouldnt be the air filter mate.
Is it idling ok?
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SRI-LEE
Member
Registered: 16th Feb 08
Location: kendal
User status: Offline
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yep everythings spot on apart from power delivery 
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john_c20xe
Member
Registered: 10th Feb 08
Location: Eastbourne, EastSussex
User status: Offline
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quote:
Originally posted by Ricky352
Wouldnt be the air filter mate.
Is it idling ok?
why would it be the air filter?
prove me wrong but i very much dout an airfilter will giv you running problems,
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Sean-B
Member
Registered: 1st May 07
Location: Wolverhampton Drives: 200SX S14a
User status: Offline
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Check your vacuum pipes. One to FPR one to fuel tank vent valve, one to MAP sensor , one to rocker cover breather
Also is your ATS in direct air flow?
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SRI-LEE
Member
Registered: 16th Feb 08
Location: kendal
User status: Offline
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think it could be the fuel tank vent valve now as there is only one pipe connected could this cause the problems then? many thanks lee
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Sean-B
Member
Registered: 1st May 07
Location: Wolverhampton Drives: 200SX S14a
User status: Offline
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There should be one flexagle rubber pipe going to vacuum. Then the other goes to a hard thin black pipe that disappears behind the engine.
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--ToM--
Member
Registered: 23rd Nov 07
Location: Wirral
User status: Offline
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check for air leaks
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Ricky352
Member
Registered: 6th Apr 07
Location: Lisburn, N.I.
User status: Offline
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If there were air leaks id guess it would idle high though.
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--ToM--
Member
Registered: 23rd Nov 07
Location: Wirral
User status: Offline
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u suppose so, what if the old throttle body hole hasnt been blanked off properly and is leaking air a bit ?
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SRI-LEE
Member
Registered: 16th Feb 08
Location: kendal
User status: Offline
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all seems fine plumbed the pipe where it should be and its still doing it what happens is you put your fut down its fine till 3500 then its a massive flat spot then pulls loads from 5000 ish
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Alan-16V
Member
Registered: 5th Apr 08
Location: North Wales
User status: Offline
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that sounds about right power wise
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Sean-B
Member
Registered: 1st May 07
Location: Wolverhampton Drives: 200SX S14a
User status: Offline
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No it doesn't mine pulls hard from 2500 with no flat spots. Replacing my TPS solved that problem. But are you sure all your vac plumbng is right?
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SRI-LEE
Member
Registered: 16th Feb 08
Location: kendal
User status: Offline
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well my tps work fine as far as im a ware maybe need to re check the wiring as i had to extend it to reach the throttle body yeah im sure mate il take a pic of it tomorrow cheers for teh help
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Sean-B
Member
Registered: 1st May 07
Location: Wolverhampton Drives: 200SX S14a
User status: Offline
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You shouldn't have extended it. You can just pull it back through the split loom. This maybe affecting the signal from the TPS
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SRI-LEE
Member
Registered: 16th Feb 08
Location: kendal
User status: Offline
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yeah ano thats what i intended to do but someone had been in there before and the 2 wires for the tps were joined together by one if you know what a mean anyway i had to split them for it to reach would this be a proble as there just the same as they were but longer?
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Ste
Premium Member
Registered: 5th Mar 03
Location: Taif, Saudi Arabia
User status: Offline
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If a 'power box' makes it shit and reduces power then just put the standard stuff back in! If it is still shit then it is easier to fault find with standard gear on.
I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.
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SRI-LEE
Member
Registered: 16th Feb 08
Location: kendal
User status: Offline
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its not shit power its just strange delivery it seems to be getting better the more i drive it?? has anyone elses took a while to settle in?
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SRI-LEE
Member
Registered: 16th Feb 08
Location: kendal
User status: Offline
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it seems to be getting better the more i drive it ive noticed does pull well but still feels like it shud be pulling more il give it till the end of the week and see what happens 
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Richardhhha
Member
Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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i had this problem with mine,
the vacume hosing given in most kits it pritty crap and when the engine gets warm it goes loose and doesnt seal propperly.
get some 3mm silicone hosing off ebay cost me £5 for 2 meters.
just need to plum the fuel vent valve, fuel pressure rail, and the manifold absalute pressure valve, into the hosing.
that made the car feel better to drive for me,
then i reduced the tp and icv wiring to just as much as was needed not any more, i know now that you can split the loom but with my car the icv wiring was spliced into the egr wiring so i couldnt strip it back and had to extend.
then i found that if you have a drilled air box it was still a git to drive, so replaced that, aswell as a new MAP sensor and CTS and hay presto it was all fixed.. only drove it for about 10 minuits tho as i stoped at a pelican crossing and got shunted now the cars writen off but it was all coshdy till then lol
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SRI-LEE
Member
Registered: 16th Feb 08
Location: kendal
User status: Offline
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spot on cheers mate mine tps wiring was like that and i have a drilled airbox il try the pipe and remove the drilled airbox for my pipercross and see if i get any improvement cheers mate unlucky bout the car tho
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