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Author Crank sensor on a GSi?
Adge
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Registered: 28th Aug 04
Location: Lancashire
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22nd May 08 at 20:13   View User's Profile U2U Member Reply With Quote
cud this cause a flat spot at lwo revs? any ideas on cost? really need sum info on the effects of a faulty one? can they be cleaned? fitted incorrect or they a common failing?

[Edited on 22-05-2008 by Ian]
bubble
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Registered: 24th Jan 04
Location: Darwin, NT Australia.
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22nd May 08 at 20:14   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Adge
cud this cause a flat spot at lwo revs? any ideas on cost? really need sum info on the effects of a faulty one? can they be cleaned? fitted incorrect or they a common failing?

no. wud cause engine to not run as cant determine TDC for injector duty cycle.
Adge
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Registered: 28th Aug 04
Location: Lancashire
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22nd May 08 at 20:16   View User's Profile U2U Member Reply With Quote
not run at all?? well its still runs fine just struggles at low revs then once its past the flat spot its fine, also runs 100% better once EML is on
bubble
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Registered: 24th Jan 04
Location: Darwin, NT Australia.
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22nd May 08 at 20:17   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Adge
not run at all?? well its still runs fine just struggles at low revs then once its past the flat spot its fine, also runs 100% better once EML is on


iv never know an engine run without knowing where tdc is, sounds like cud be egr valve cts or anythin. need more info.
Adge
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Registered: 28th Aug 04
Location: Lancashire
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22nd May 08 at 20:19   View User's Profile U2U Member Reply With Quote
i knw! hard to find a reliable garage ive been told 100 different things from 100 garages, i just need sum willing to spend sum time on it
dean101287
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Registered: 22nd Jul 07
Location: Cardiff
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22nd May 08 at 20:21   View User's Profile U2U Member Reply With Quote
wot do you mean by flat spot? i think I may have a simular problem
Adge
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Registered: 28th Aug 04
Location: Lancashire
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22nd May 08 at 20:22   View User's Profile U2U Member Reply With Quote
like the car doesnt want to move then all of a sudden kicks in and runs fine, then again once u slow back down at traffic lights etc it does it again. but u can still drive round no problems just its bad atlow revs
dean101287
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Registered: 22nd Jul 07
Location: Cardiff
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22nd May 08 at 20:26   View User's Profile U2U Member Reply With Quote
mine runs fine, now and again when doing say 30 in 4th it will judder a bit as if it needs a lower gear. also if you put your foot down from dead stop it seems to take a while and then kick in at 3k revs
Adge
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Registered: 28th Aug 04
Location: Lancashire
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22nd May 08 at 20:27   View User's Profile U2U Member Reply With Quote
mine is same!!!! if u find out wat it is! let me knw! GARAGE told me it was crank sensor today!
dean101287
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Registered: 22nd Jul 07
Location: Cardiff
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22nd May 08 at 20:29   View User's Profile U2U Member Reply With Quote
have you tried spark plugs and leads? it doesnt really bother me as it not that bad at all. also gunna change air filter on the weeked.
IvIarkgraham
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Registered: 27th Mar 04
Location: Ellesmere Port, Cheshire
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22nd May 08 at 20:33   View Garage View User's Profile U2U Member Reply With Quote
could it not be a vacuum leak?
Adge
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Registered: 28th Aug 04
Location: Lancashire
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22nd May 08 at 20:34   View User's Profile U2U Member Reply With Quote
i have no idea, any way to check?
bartstart
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Registered: 30th Dec 07
Location: DURHAM
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22nd May 08 at 23:42   View User's Profile U2U Member Reply With Quote
my sxi did this got a local home tune out it was the crank sensor on mine
Adge
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Registered: 28th Aug 04
Location: Lancashire
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22nd May 08 at 23:44   View User's Profile U2U Member Reply With Quote
so it was still running but just with a flatspot? or it wasnt running?
johnhara1
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Registered: 19th Oct 06
Location: Newcastle upon Tyne
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23rd May 08 at 10:13   View User's Profile U2U Member Reply With Quote
Does it have an induction cone filter??

This caused my XE to struggle at low revs. If also had a faulty AFM.

Also have you tried a replacement AFM?


My fiesta used to hesitate and hold back through the whole rev range.

I changed the plugs and gently cleaned the element in the MAF (AFM on yours) with a cotton bud and carb cleaner.

Car is now perfect! No flat spots, no hesitation what so ever.

[Edited on 23-05-2008 by johnhara1]
Adge
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Registered: 28th Aug 04
Location: Lancashire
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23rd May 08 at 11:51   View User's Profile U2U Member Reply With Quote
hey mate, yeah ive replace the AFM i am using a induction cone filter tho but the engine was running fine for 12 months until it went into storage for 4 months, thats wen the problems started! just bought a crank sensor from barleyboy so hopefully might sort it!
Jord16vSport
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Registered: 3rd May 08
Location: colchester essex
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23rd May 08 at 14:59   View User's Profile U2U Member Reply With Quote
same problem on my friends astra. wouldnt idle would just cut out, so he got someone he works with to have a look as his engine management light was on and it turned out to be his egr valve

 
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