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Author Subject: revving out
daytime-6

Regular

Location: devizes

Registered: 06 Jan 2010

Posts: 133

Status: Offline

Post #1
for the past few days ive noticed that i can rev to 4000rpm but after that it struggles like hell,has anyone else had the same problem,ive tried cleaning my map sensor and changing coil packs over but still have the same problem every time

cheers

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Team Astor
Posted 22nd Dec 2010 at 00:17
anth

Seasoned Pro

Location: Colchester

Registered: 04 Apr 2006

Posts: 3,651

Status: Offline

Post #2
Bottom end f*cked? Razz
Posted 22nd Dec 2010 at 00:20
joevts

Senior User

Location: barnsley

Registered: 21 May 2008

Posts: 608

Status: Offline

Post #3
what does it sound like when it gets to 4k? i had a similar problem in my paxo once, turned out a stray tennis ball had rolled under my seat and got wedged under the throttle pedal LOL hope yours turns out to be something daft like that, NOT a f*cked bottom end, because that's just not funny Roll eyes
Posted 22nd Dec 2010 at 00:23
daytime-6

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Location: devizes

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Post #4
hope not, its had a full rebuild about 20,000miles ago Sad

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Team Astor
Posted 22nd Dec 2010 at 00:25
daytime-6

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Location: devizes

Registered: 06 Jan 2010

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Post #5
it sounds like its runnin out of rev's n slows down and i can just get over 5,500rpm , like if it hasnt got a rev limiter n dies down if you now what i mean,

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Team Astor
Posted 22nd Dec 2010 at 00:28
joevts

Senior User

Location: barnsley

Registered: 21 May 2008

Posts: 608

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Post #6
ignition timing maybe? could be the crank position sensor or something.
Posted 22nd Dec 2010 at 05:29
daytime-6

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Location: devizes

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Post #7
Were abouts would the crank position sensor be as I'm kinda new to were these parts are ?

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Team Astor
Posted 22nd Dec 2010 at 13:25
joevts

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Location: barnsley

Registered: 21 May 2008

Posts: 608

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Post #8
i have no idea LOL sure someone else will though
Posted 22nd Dec 2010 at 14:45
roland rat

Yeeeah Rat fans!

Location: Swansea

Registered: 29 Nov 2006

Posts: 22,284

Status: Offline

Post #9
Crank sensor is on top of thr gearbox under the thermostat housing Wink

I'd say maybe the TPS (throttle posistion sensor) has gone or even something fouling the accelarator cables path causing this
Posted 22nd Dec 2010 at 15:25
daytime-6

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Location: devizes

Registered: 06 Jan 2010

Posts: 133

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Post #10
I've had a look at the cable and it all looks pretty free and nothing making it restrict it's self,how can I test the TPS sensor for if it's working or not?

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Team Astor
Posted 22nd Dec 2010 at 15:54
roland rat

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Location: Swansea

Registered: 29 Nov 2006

Posts: 22,284

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Post #11
Get a multimeter and see what reading your getting from it.all the reading are in the FAQ section somewhere
Posted 22nd Dec 2010 at 15:58
daytime-6

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Post #12
Ok cheers will give it ago when get home,cheers for help

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Team Astor
Posted 22nd Dec 2010 at 16:00
smegal

Seasoned Pro

Location: Leeds

Registered: 26 Dec 2005

Posts: 5,940

Status: Offline

Post #13
Blocked cat or exhaust.

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Posted 22nd Dec 2010 at 16:23
daytime-6

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Location: devizes

Registered: 06 Jan 2010

Posts: 133

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Post #14
'the car sometimes feels like its holding back on the power it has and other times it goes like '

Thats what I got when looking at the other threads on throttle position sensor and I'm having the same problem so it defo has to be my TP sensor

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Team Astor
Posted 22nd Dec 2010 at 16:27
roland rat

Yeeeah Rat fans!

Location: Swansea

Registered: 29 Nov 2006

Posts: 22,284

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Post #15
smegal wrote:
Blocked cat or exhaust.


Good shout mate
Posted 22nd Dec 2010 at 16:28
daytime-6

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Location: devizes

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Posts: 133

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Post #16
I've got a magnex cat back system and it's got a rattly centre section but it's been like it since I've had the car ,you reason I should go to a mot station n ask them to test my emissions?

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Team Astor
Posted 22nd Dec 2010 at 16:45
spiky

Seasoned Pro

Location: Cardiff

Registered: 13 Oct 2006

Posts: 2,310

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Post #17
maybe the rev counter is mis reading?

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Posted 22nd Dec 2010 at 17:37
daytime-6

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Location: devizes

Registered: 06 Jan 2010

Posts: 133

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Post #18
Na that reads ok ,it revs ok whn not in gear it's only when you put load on the engine that it doesn't wana performe how it should do

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Team Astor
Posted 22nd Dec 2010 at 19:33
rallyeash

Seasoned Pro

Location: Devizes

Registered: 11 Dec 2006

Posts: 4,424

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Post #19
crank sensor, throttle pot sensor, icv, lambda, colapsed/blocked cat.

if the engine sounds alright below 4k i'd looks at checking those.

ive got spare cat mate if you want one to try.

crank sensor is only like £20 from a factors.

injectors all firing alright? could be injector gone down or dodgy connections
when the throttles fully down the butifly is open fully.

got injectors/rail you can use to fault find but you cant keep it.

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309 3dr K20 Type R
Posted 23rd Dec 2010 at 00:46
daytime-6

Regular

Location: devizes

Registered: 06 Jan 2010

Posts: 133

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Post #20
I tried the emissions n there fine,I'm guna order a new tps and a crank sensor tomorrow and see if they sort the proplem out,yer it pulls reali well up till 4k thn hardly anything happens after that

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Team Astor
Posted 23rd Dec 2010 at 21:05
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

Status: Offline

Post #21
wont be the crank sensor if it runs, they tend to work, or not.

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Posted 23rd Dec 2010 at 21:37
daytime-6

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Location: devizes

Registered: 06 Jan 2010

Posts: 133

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Post #22
so u recon it will be the tps then?

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Team Astor
Posted 23rd Dec 2010 at 23:02
rallyeash

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Location: Devizes

Registered: 11 Dec 2006

Posts: 4,424

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Post #23
ive had a faulty crank sensor which was giving weak readings but genuinly yes eithere they work or don't.

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230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 24th Dec 2010 at 01:25
daytime-6

Regular

Location: devizes

Registered: 06 Jan 2010

Posts: 133

Status: Offline

Post #24
So should I buy both or buy one at a time and go from there?,why's your number ash i don't think I've got it lol

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Team Astor
Posted 24th Dec 2010 at 10:11
rallyeash

Seasoned Pro

Location: Devizes

Registered: 11 Dec 2006

Posts: 4,424

Status: Offline

Post #25
07796313382.

upto you mate, could buy one at a time but with xmas shutdown could take a while to order one at a time so i'd buy both.

lambda sensor alrite?

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230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 24th Dec 2010 at 17:37

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