MK4 GTI Misfire

[MK2 GTI]

Hey all,
Got a MK4 GTI thats not firing on 4 cylinders, we changed plugs and coil packs, thats not the problem. Is there any other common problems that it would be? Thought i would ask before i get deeper into it.

[syncro]

Coil packs.

[Golf Loon]

H T Leads?

[syncro]

H T Leads?

You mean connectors? The leads last forever. (They're copper)

[h100vw]

You need to scan it with VAG-COM the amount it can tell you is amazing.

The only thing I have heard that fails all the time apart from coil packs is the water temp sender. Check you have a green one fitted the black ones are the duff ones.

Gavin

[Bug_racer]

You need to scan it with VAG-COM the amount it can tell you is amazing.

The only thing I have heard that fails all the time apart from coil packs is the water temp sender. Check you have a green one fitted the black ones are the duff ones.

Gavin

Vag com doesnt pick up misfires on a mk4 Golf .

The ignition module is on the side of the airbox near the MAF . Disconnect it and clean the 2 plug terminals and put it back in . Sometimes that fixes the problem . If it doesnt work try and find another one to swap it with

[MK2 GTI]

Syncro- Already changed coil packs, thats not the problem.

Golf Loon- Are you getting this mixed up with a 1.6/2ltr? Unless you mean those leads to the coil packs.

H100VW - Already changed the black temp probe to green a while back, I will scan it tomorow when i have time to look.

Bug_racer - I will try that.

Thanks for the info guys. I will look at it tommorow when i have time, i just thought there might be a common thing apart from coil packs.

[syncro]

Can you isolate any particular cylinder?

[MK2 GTI]

i havn't even looked at the car yet, i will tommorow though.

[h100vw]

Vag com doesnt pick up misfires on a mk4 Golf .

Is that a feature of the NA ECU cos I have seen it on 1.8Ts.

Gavin

[william]

Vag com doesnt pick up misfires on a mk4 Golf .

it does as has built in ociliscope

[h100vw]

Vag com doesnt pick up misfires on a mk4 Golf .

it does as has built in ociliscope

I think he may mean as a fault code in it's own right.
Gavin

[MK2 GTI]

Bug Racer- You were right, it was the ignition control module, runs fine now! I tell you what a MK4 GTI with a KO4 turbo and a GIAC chip goes good as! I wanna get a Audi A4 1.8T Quattro with the same mod now lol.

[GTIputih]

How do you know it is a misfire? Sorry for the silly question.. *newbie*

[mikinoz]

Fuel pump and/or filter?:/