16v GTI misfire (2000 - 3000rpm)

[lectrotek]

Hi Guys,

So I get my valver back from the menders after getting a brake hose sorted and they report this misfire.

I've known this for ages and have done a few things to try and sort it out but no joy.

Have tried: New plugs/leads + service etc

Mechanic mentioned it might be an injection problem/fuel filter.

Has anyone had a similar problem? At my wits' end trying to figure it out 

Cheers.

[emmin]

Hi there, this is my first message to this forum. I was checking answers around the world about it.
Im from Turkey, and i have a problem like yours.
My car also shakes when the rpm reaches between 2,400-3,400rpm
Connected to a computer, checked every sockets and plugs and could not find anything, and my reapirman said, we have to change distributor it must be about ignition.
Have you solved the problem ?

this is mine. 16v ABF
https://scontent-b-lhr.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/s720x720/10711102_10154837971855441_2637193784406651262_n.jpg?oh=53635affd264c0185e95383e2b882c62&oe=550CD486

[itavaltalainen]

Any fault codes?

If there aren't try a log drive....

[VW BUSH]

First rule of Mk3's swap the coil over if it misses or conks out and does not throw a fault code.

[lectrotek]

Yeh no fault codes

Cheers Bush, this is interesting...Any particular specification of coil u recommend?

[LR5V]

Any particular specification of coil u recommend?

If you can find one - Beru are the OEM manufacturer.

Personally I would say there are lots of things to look into on an ABF before the coil -
Try cleaning throttle body & ISV
Check the condition of the wiring going to the throttle body -its location above the exhaust manifold bakes the insulation causing shorts.
Carefully check over the small vacuum hose for leaks -best just to replace with silicone
Lastly have a good look at the crank sensor the insulation on the cable likes to go brittle - even the sensor body can go brittle too.

[lectrotek]

LR5V, thanks for that. proper food for thought

All these things difficult to do? I imagine coil + throttle body aren't too tricky...any pitfalls for a novice?

Tim

[itavaltalainen]

coil is very easy, 2 screws.
TB a bit more difficult, you may have to take it off to clean it (and then likely need a new gasket)

[lectrotek]

I thought the TB was just a case of disconnecting the air inlet, spraying carb cleaner and wiping the gunk out...that isn't likely to damage the gasket is it?

[itavaltalainen]

Yes pretty much is but I would take it off and clean it outside....

I have used brake cleaner in the past and some lint free tissues


Gasket is p/n 037129748 and it's not too expensive