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Model specific boards => Golf mk4 => Topic started by: 1.8t-net on 16 August 2013, 00:14

Title: Lumpy between 1 & 2000RPM
Post by: 1.8t-net on 16 August 2013, 00:14

I have an AUM MK4 1.8T and have fixed the secondary air intake and starter over run.  Its had a new dump valve, air filter, MAF, N75, Bank 1 Lambda sensor and its now doing my head in.  No fault codes.
Seems ok most times from cold, but when warm its lumpy between 1 & 2k RPM.

What could this be, or does anybody want to buy it as I am done with guessing.

Title: Re: Lumpy between 1 & 2000RPM
Post by: GTi_James on 16 August 2013, 08:09

Check your vac pipes for any splits bud

Title: Re: Lumpy between 1 & 2000RPM
Post by: Nino on 16 August 2013, 08:23

Ring vw and see if ur car has been recalled for coil packs and give your TB a clean

Title: Re: Lumpy between 1 & 2000RPM
Post by: 1.8t-net on 23 August 2013, 23:27

Really, the car is 2001 model will they seriously look at coil packs?

And is there a common vac hose that I need to check first?  Looks like loads on it!!!!

Title: Re: Lumpy between 1 & 2000RPM
Post by: baxxy on 24 August 2013, 11:43

Main dealer will change only genuine failed coil packs if its on recall and look at the breather that comes out of the right hand side of the rocker cover goes down infront of the engine they go mushy  :smiley:

Title: Re: Lumpy between 1 & 2000RPM
Post by: 1.8t-net on 25 August 2013, 21:07

Thanks Baxxy but I already put a new one of those hoses on, the Y type hose.  Really had just about enough now, so trolling through internet looking for another car.  Shame.  Will probably scrap this junk.

Title: Re: Lumpy between 1 & 2000RPM
Post by: mike1990 on 25 August 2013, 22:03

Quote from: 1.8t-net on 25 August 2013, 21:07

Thanks Baxxy but I already put a new one of those hoses on, the Y type hose.  Really had just about enough now, so trolling through internet looking for another car.  Shame.  Will probably scrap this junk.

Checked the engine temperature sensor?

Title: Re: Lumpy between 1 & 2000RPM
Post by: 1.8t-net on 27 August 2013, 23:17

Will do now, thanks.  Report back tomorrow.....