GolfGTIforum.co.uk
Model specific boards => Golf mk5 => Topic started by: Wheatles on 22 February 2010, 19:07
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In neutral the car sounds like its on its way to stalling, then revs from 800 to about 2000 revs then back to 800 revs. This revving pattern keeps repeating itself without the car stalling :undecided:
I put Esso super unleaded 97 petrol 6 days ago because was nowhere near a shell garage to get the proper pertrol, unsure if this is related.
The car still feels responsive when driving although the revs dont seem to drop off as quick when lift foot completely off accelerator
(Manual not DSG)
Any ideas?
Cheers
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Whats the age and mileage?
MAF is one possible culprit but there are many more. Best bet is to get it hooked up to a diagnostic machine (VAGCOM or VCDS as its now known) is a good one. Depending where you are there might be a forum member willing to help out :smiley:
Any warning lights on?
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Hi,
Had similiar problem in my case it was down to PCV. Search forum idle problem, has photo of part.
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Thanks
Its 2005, 48000 miles, no warning lights on dash
live in Leeds.
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Its 2005, no warning lights on dash
I would also say a vac leak by the sound of it.
You really need to get a laptop hooked up to the car so you can see what the ecu is seeing and doing.
Where are you from?
Nick
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Leeds
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It could be a number of things related, or unrelated to each other...
I had the high/low idling symptoms for a while, but a new throttle body sorted it out, but it could also be the MAF, PCV, DV, software reflash, fuelling issues...
Search for all of these things on the forum for some more info, but really VAGCOM/VCDS is your friend. Get some data logged and it'll save you time & money. :afro:
Leeds
There's quite a few people on here from in/around the Leeds area. If not in here, deffo in the MKVI section.
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Have you tried disconnecting the cable going to the MAF?
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Also I'd look at the coilpacks too, but by the symptoms you describe it could be simply loose pipework. Have you been under the bonnet recently? if so where and what for? Often it is something that gets disrupted inadvertantly whilst doing another job. :smiley:
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Thanks for all the replies.
I have only had the car for 4 months so bit gutted that something gone wrong already, warranty expired last month!
Can somebody explain what MAF, PCV, DV are cos i havent got a clue being a newbie!
I havent been under the bonnet, only to check oil etc but will check see if anything looks loose.
What are Stealers likely to charge to investigate the problem?
Cheers again
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Thanks for all the replies.
I have only had the car for 4 months so bit gutted that something gone wrong already, warranty expired last month!
Can somebody explain what MAF, PCV, DV are cos i havent got a clue being a newbie!
I havent been under the bonnet, only to check oil etc but will check see if anything looks loose.
What are Stealers likely to charge to investigate the problem?
Cheers again
Without going into too much detail...
MAF - Mass air filter - senses the quantity of air being drawn into the turbo at any given time. If faulty can give out an irratic idle as well as make the car under-perform or surge.
PCV - Pressure check valve - basically is a tap off the engine to help monitor running pressure. If faulty can give an irratic idle and can bleed out pressure from the car giving an underperforming engine.
DV - Diverter valve - this is a recirculating valve which helps dispel excess pressure from the car, sometimes misconstrued as being a "blow off" valve. This is more likely to give an underperforming car than an irratic idle and wouldn't in my opinion give anything like a surge on idle up to 2krpm like you are suffering from.
Stealers will charge anything up to £100 just to strap on their diagnostic equipment and tell you what they THINK is wrong with the car. They will go down the normal diagnostic route, but may change some items that are in good working order before correcting the right part/s. :angry:
To be quite honest with you, the car needs someone to diagnose what is wrong with it before anything is done. An independant garage will be cheaper and if there are people in your area with VAG-COM/VCDS then maybe they will be able to help for a few beer tokens/petrol money. :smiley:
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Wheatles if you want your car checking out then may i suggest IVW audi on hunset road just past the Skoda garage.... as i wouldnt trust VWLeeds with a pencil sharpner :wink: :smiley:
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Thanks R32UK, the car is booked in tomorrow at VW Leeds :shocked:
I think i may cancel and give IVC a call.
Have you had any dealings with VW Leeds or just heard bad things on the grape vine?
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To the OP.... I had my car in an Independent VAG garage for FOUR days looking at the same problem you described.
It turned out to be the throttle body causing the normal 800rpm idle to fluctuate between 650-2000rpm.
I still had 'flat' performace, which could be any number of the other things I described. These are known weak parts, as well as the coil packs that Hurdy mentioned, so really you must get it to a garage...
Data logging is your friend! :afro:
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Its now booked in at independent garage IVC in Leeds, taking the car there on Monday.
Will post again when car is fixed.
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The car is now fixed and running smoooooooth :cool:
Throttle body needed stripping and cleaning. The guy at IVC Leeds knew the solution before even seeing the car. Apparently is common if car does lots of short journeys which i do - 3 mile trip to work, 3 mile trip back again, not been on any long journeys for about 3 weeks.
Case closed.
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Excellent, glad you got it sorted. Now, be sure and give your car an 'Italian tune-up' now and then...
:afro:
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how much did u pay?
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£92.81 = 1.5hrs labour + 1 x tin air intake cleaner
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The car is now fixed and running smoooooooth :cool:
Throttle body needed stripping and cleaning. The guy at IVC Leeds knew the solution before even seeing the car. Apparently is common if car does lots of short journeys which i do - 3 mile trip to work, 3 mile trip back again, not been on any long journeys for about 3 weeks.
Case closed.
Good stuff. IVC seem to know what they are doing.. and judging by the number of VAG cars they have onsite they are doing it well :wink: :smiley: