Hesitation and poor throttle response: VR6

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Originally Posted by Tim

Sounds to me as though you still have a dodgy lead somewhere.

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I agree. Leads.

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Originally Posted by dubbed

Well it's not a definite way of concluding that it's the MAF. Maybe you could try swap a MAF with another VR6 owner?

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It'd be worth a try definately, as for the leads no 6 was loose which I promptly put it back in its place. Its not running like a WRX anymore but this misfire at low RPM persists, and the leads are OEM and have been replaced by the unfortunate previous owner within the last 12 odd months.

I'll do some more research and see what I can come with anyway, oh and please keep the suggestions coming :biggrin:

Its funny how much a vr6 running on 5 cyls sounds like a wrx isnt it hehe.

id say its time to break out the vagcom and make sure all your sensors are working properly

My mate had this issue with his when he had it. Turned out to be the fuel pump in the tank... :)

Hmm well if it's just misfiring now I'd be trying a new set of leads - sometimes you can get dodgy ones that let go after a few days/months.

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Originally Posted by Tim

Its funny how much a vr6 running on 5 cyls sounds like a wrx isnt it hehe.

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It must be a VW thing. When my MAF was stuffed in the 1.8t my girlfriend said, "what are you trying to do, make it sound like a WRX?!"

Hey Branko,

Just an update from my neck of the woods, I ended up taking it to another mechanic up here, all the new parts put in passed with flying colours, but bad news struck when they did a compression test. 3 outta 6 cylinders are low, one loosing ~40psi.. Leak test was done this morning, but nothing found there... Not looking forward to the next phone call thats for sure...!

-Sven

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Originally Posted by svedo

Hey Branko,

Just an update from my neck of the woods, I ended up taking it to another mechanic up here, all the new parts put in passed with flying colours, but bad news struck when they did a compression test. 3 outta 6 cylinders are low, one loosing ~40psi.. Leak test was done this morning, but nothing found there... Not looking forward to the next phone call thats for sure...!

-Sven

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Is it the rear 3 cylinders that are low? What was the cause, top end(valves) or bottom end bores??

The rear cylinders often get more worn than the front due to the angle the pistons run at. Especially if service intervals are not adhered to properly.

Lots of piston slap VRs in the UK with only average mileages on.

Gavin

Gavin

Hi Gavin,

It was cyl 2, 4 and 6, can't remember if thats front or back?.. Cause is still unknown at this stage, should get a call this arvo or monday with some more progress..

I believe that, that is the rear 3 cylinders.

Gavin

my 5c worth
before spending big get some electrical contact cleaner from super-cheap and clean all the temperature sensor connections - -that's the ones in the group of three on the front of the engine and the intake air temp sensor on the top right of the engine as you look at it right behind the fuel pressure regulator...I once forgot to reconnect that little sucker and the car ran BADLY