Mk3 Gti 8v 5000rpm

[boneybradley]

could be timing, dizzy fitted 180degree out or something else (fault code hopefully should show).... check all 3 as moving the dizzy wont make much difference (not with a 5000rpm limit)

[dom]

disagree - get it set correctly and if its still wrong then look at repair/replacement options.  Setup is FAR easier than replacing the whole unit!

My advice was to check for fault codes not to just replace parts 

Agreed, your better to scan for codes before spending money on parts

[VW BUSH]

Scan the car first to make sure its not the crank sensor rather than the hall sensor
If the timing is out it will say check the hall sensor anyway......
Set timing to tdc and check rotor arm lines up with mark on the dizzy, adjust dizzy (may need to remove dowels) if its out by a small amount and reset and re scan the ecu. (dizzy mark should be block side)
This will tell you if its the hall sensor or just the timing.
Dizzy needs to come off to change the hall sensor if its at fault.

My money is the on the inter shaft being out a tooth or two, if its more then you need to reset the timing properly over moving the dizzy position.

[boneybradley]

Can i add... if it's had a dizzy then it should of had a hall sender (as they all seem to come as part of a replacement dizzy)

still scan as the hall sender wires can become brittle with age (which throws the same fault code up) and you simply need to renew them

[javalin]

>and you simply need to renew them
done this on mine.  Easy if you can solder.

[Kelvin.bagged]

Ok thanks alot guys, checking timing etc is gonna be easy for me, but fault code reading won't be as I have no fault code reader n my mate who does as I shagged laptop, anyone on here from Woking/Guildford area with one?

Kelvin

[gti gaz]

get yourself a memo scanner on gaybay only 25 sheats quite handy to have not one of the best by far but does the basics

[javalin]

Personally I would set the timing first, then get code reader if problems continue.  Mk3's don't seem to log a lot, unless there is a big fault (i.e. sensor broken)