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Model specific boards => Golf mk3 => Topic started by: ginga on 10 March 2010, 05:43

Title: poorly Vr6
Post by: ginga on 10 March 2010, 05:43

hey need some medical advice the 6 is running pants it splutters got wee bit of back fire and does this all through the rev range. i have tried to clean the maf but hasn't made the slightest difference..any ideas anyone

Title: Re: poorly Vr6
Post by: bmw156 on 10 March 2010, 07:18

checked ya spark plugs?
checked for air leaks?

not sure if it has one, but crank sensor?

Title: Re: poorly Vr6
Post by: VR6-Joe on 10 March 2010, 10:52

Common problem on the VR is plug leads (my dad went through two sets)

Or coilpack if it's an OBD2

Title: Re: poorly Vr6
Post by: ace on 10 March 2010, 10:53

would start with leads, plugs and coilpack

Title: Re: poorly Vr6
Post by: ginga on 10 March 2010, 13:11

is the coil pack easy to remove?

Title: Re: poorly Vr6
Post by: ace on 10 March 2010, 13:44

hi mate try this link

http://www.vaglinks.com/Docs/VW/MKIII/VW_MKIII_VR6_Coil_Pack_Fix_DIY.pdf

hope that helps

Title: Re: poorly Vr6
Post by: FlySpeck on 10 March 2010, 13:51

what year is it mate? Does it have a distributor on the end of the head, or a rubber block where the plug leads come out of?

If its a dizzy (obd1) then the coil is bolted under the wiper panel, can see it wi the bonnet up, only 2 screws hold it on I think, and the other kind (obd2) is a proper 6 way coilpack bolted to the rhs end of the head.

Here is a great write up on that maf (well its the audi S2 one but identical to the obd1 vr6 maf) to test it and see how it should be cleaned, great pics too.

http://s2central.net/ds_G70.html

The hoses are rubbish and do split esp. on the breather side underneath where the oil collects lol

The early vrs have a rubber inlet tube thats good, but the later ones are plastic and they crack sometimes, letting in un-metered air.

Title: Re: poorly Vr6
Post by: DazVR6 on 10 March 2010, 14:06

Before doing anything get the codes read....might help point you in the right direction.

Title: Re: poorly Vr6
Post by: FlySpeck on 10 March 2010, 15:20

+1 - first place to start if you can. Makes life easier knowing where to start looking mate.

Title: Re: poorly Vr6
Post by: ginga on 13 March 2010, 06:33

just want to ad that the only does it when its warmed up to runnin temp

Title: Re: poorly Vr6
Post by: FlySpeck on 13 March 2010, 14:24

if pressed for a quick stab, id say MAF or ECT sensor - either can cause weird fuelling issues that seem to occur with a temperature connection. Mine used to run fine cold, then would lose power and backfire as soon as it hit 60oC on the MFA oil temp, plunging bucketloads of fuel down the exhaust. 19mpg at 40mph it was doing!

The MAF showed "short circuit to gnd" fault, I replaced it, hey presto. 33.5mpg at 65mph and only backfires now on the over-run, as I have a decat pipe....  :rolleyes:

BUT you need the codes scanned first.