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Model specific boards => Golf mk4 => Topic started by: chol_gti on 26 June 2009, 22:12

Title: revs up and down slightly and not as responsive as should be???
Post by: chol_gti on 26 June 2009, 22:12
hey had a few probs with car l8ly so i had it all code read etc came bk with like 5 faults so i changed the maf and now ive changed the lambda sensor runs alot better having changed the lambda and mpg is right back up 2 averageing above 35mpg which im happy with rather than 12mpg.

still the revs are slightly high like 1500rpm on idle and wen i change gear they seem to blip up when clutch is pressed so i can never get a smooth gear change without a slight jolt???
so ive put it back on the code reader it came up with 5 still so i erased them all unpluged went for a drive and tryed again. now there is NO codes which is a good thing but still driving pretty lumpy. could it still possibley the maf? i had to buy cheap as i have just been made redundant :( i no u lot dont advise this but could this be the problem? also anything else i could check or do to get it running better? spark plugs, filter, throttle body clean etc etc??
thanx
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: northeast_gti-t on 27 June 2009, 01:12
Quote from: chol_gti on 26 June 2009, 22:12
hey had a few probs with car l8ly so i had it all code read etc came bk with like 5 faults so i changed the maf and now ive changed the lambda sensor runs alot better having changed the lambda and mpg is right back up 2 averageing above 35mpg which im happy with rather than 12mpg.

still the revs are slightly high like 1500rpm on idle and wen i change gear they seem to blip up when clutch is pressed so i can never get a smooth gear change without a slight jolt???
so ive put it back on the code reader it came up with 5 still so i erased them all unpluged went for a drive and tryed again. now there is NO codes which is a good thing but still driving pretty lumpy. could it still possibley the maf? i had to buy cheap as i have just been made redundant :( i no u lot dont advise this but could this be the problem? also anything else i could check or do to get it running better? spark plugs, filter, throttle body clean etc etc??
thanx

From what you have said i would recommend an oem maf unit imo the original part for the job maybe dearer but as they say buy cheap buy twice i should know  :rolleyes: well when you can afford it anyway also if you know someone local with vag-com the idle speed can be altered in adaption mode or one of them anyway but depending on sparkplug conditions etc if you dont know the history etc i would recommend a set of decent plugs as matter of course to and also clean up the throttlebody housing etc hth
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: richw911 on 27 June 2009, 12:53
TB clean?
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: chol_gti on 28 June 2009, 19:37
whats a tb???? thanx for help. i really cant afford a new maf i spoke 2 a mechanic and he sed that my plugs will prob b knackered after the fuel etc running 2 rich. may have 2 try everything else b4 i go bk 2 changeing maf
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: richw911 on 28 June 2009, 19:52
Quote from: chol_gti on 28 June 2009, 19:37
whats a tb???? thanx for help. i really cant afford a new maf i spoke 2 a mechanic and he sed that my plugs will prob b knackered after the fuel etc running 2 rich. may have 2 try everything else b4 i go bk 2 changeing maf

Throttle body  :smiley:

http://www.golfgtiforum.co.uk/index.php?topic=87783.0
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: chol_gti on 30 June 2009, 13:43
oh right yea cheers. i put it on the machine again its now reading 2 faults 1 saying throttle position sensor not detected and other saying fuel to rich or lean cant remember??
whats a throttle sensor? and could this be my problem?
cheers
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: rheady on 30 June 2009, 16:27
I believe its part of the actual throttle housing. Have you tried cleaning the throttle housing. There is a how to in the maint section. I'd try that first only cost would be some carb cleaner and some cotton wool buds.
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: northeast_gti-t on 30 June 2009, 23:27
Quote from: chol_gti on 30 June 2009, 13:43
oh right yea cheers. i put it on the machine again its now reading 2 faults 1 saying throttle position sensor not detected and other saying fuel to rich or lean cant remember??
whats a throttle sensor? and could this be my problem?
cheers
have a look at the link rich posted  :wink:
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: chol_gti on 01 July 2009, 10:37
im gona clean the throttle body 2day. i took it 2 a friend mechanic and by looking at the sensor and throttle body he thinks its not long been changed. so u think if i clean all the crap out maybe the error cold will be sorted? either way im gona do it 2day thanx
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: richw911 on 01 July 2009, 22:38
Quote from: chol_gti on 01 July 2009, 10:37
im gona clean the throttle body 2day. i took it 2 a friend mechanic and by looking at the sensor and throttle body he thinks its not long been changed. so u think if i clean all the crap out maybe the error cold will be sorted? either way im gona do it 2day thanx

Could well do let us know how you get on  :smiley:
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: chol_gti on 02 July 2009, 01:02
okay so i cleaned throttle body 2day and a few surrounding pipeswasnt overly dirty but still.
went for a drive i thought it felt better then came bk whacked it on diagnostic and cums up with
throttle sensor position closed
random misfire
misfire in cylinder #3

so i take it me cars fooked :( all i need when after being made redundant and theres no jobs out there not happy at mo.
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: bondbill2k2 on 02 July 2009, 08:26
wow someones overdramatic a misfire can be from a number of things!
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: chol_gti on 02 July 2009, 09:53
its just because its 1thing after another atm and its stressing me out because ive had the car around 4months when i got it, it wasnt running amazing but i thought this was due 2 the maf which it was then the lambda sensor and a few other faults etc
anyways can any1 help me out on here with the what it could be? thanx
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: Rhyso on 02 July 2009, 10:54
I think the sensor is approx £30 and VW will know it as a CAM Position sensor

Topher or ivor will know for sure  :nerd:
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: chol_gti on 02 July 2009, 12:02
u think this is the reason i have a misfire in cylinder 3 also or just the throttle sensor?? cheers
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: Rhyso on 02 July 2009, 12:18
Quote from: chol_gti on 02 July 2009, 12:02
u think this is the reason i have a misfire in cylinder 3 also or just the throttle sensor?? cheers

my guess would be the throttle position sensor IS causing the misfire

either way you need to replace the sensor
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: chol_gti on 02 July 2009, 12:21
cant understand it looks brand new! theres noway i could of put the throttle body or pipes back together wrong is there thats causing the misfire??
i had the throttle position sensor closed b4 i did it , but with these 2 new 1's comeing up after is it something ive done?
would throttle position being closed affect my car alot?
thanx for help really appreciate it.
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: chol_gti on 02 July 2009, 13:11
plz? might go vw and get one how much u reckon?
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: chol_gti on 02 July 2009, 22:42
okay so ive been vw 2day and the part isnt called the throttle sensor as said and they cant find a part called CAM position sensor. so im a bit confused on which part i need and so was the bloke, he came back to me with another sensor which cant remember name which was gona cost £90 but i didnt know if it was the correct one.
can some1 help me out and tell me which sensor i need please???
again prob is ''throttle position sensor - closed'' thats what the code reads.

thanx
Title: Re: revs up and down slightly and not as responsive as should be???
Post by: chol_gti on 03 July 2009, 09:59
any1 please would like 2 fix this 2day. thanx