Running problems

[oakgreengolf]

ok just had a look no arcing also pulled 5th injector out no change. plenty of exhaust popping still  didnt have a spray bottle though

[rubjonny]

hmm id go with dannys assessment of ign prob, try pulling a spark plug lead 1 by one.  if you find one of the leads makes no differnce to how engine runs then you found a cylinder that aint firing!

[oakgreengolf]

tryed this one just dies when you remove them. There is a fair bit of oil under the dizzy would this be effecting it. Seal perhaps??, Also the plug that goes onto the dizy, the wiring is a bit frayed. I gave it a wiggle with the engine running and made no difference. this will need sorting but i dont think its causing my problems. I'm going to gscps tomorrow, new plugs and rotar arm. maybe this will help.

[rubjonny]

oil inside dizzy is sign the internal dizzy seal is shafted, i replaced the seal on mine yesterday as it happens!  reasonably easy job once you get the lock pin out, which is a right sod its in there tight!  I haven't actually tried putting the pin back in yet so we'll see how that goes!

[oakgreengolf]

i here these seals are not available from vw any ideas where to get one from?

[rubjonny]

yes indeed, http://simplybearings.co.uk size is 12x19x5.  I used the one with a dust lip
http://www.clubgti.co.uk/forum/showthread.php?t=125544

[oakgreengolf]

http://simplybearings.co.uk/shop/advanced_search_result.php?search_in_description=1&keywords=12x19x5mm

ive got these 2 that have come up which one do you think?.

[Conker]

Clean your dizzy out with WD40 (let it dry a bit before starting it up though) and see if that makes a difference before buying the new seal. Pay particular attention to the Hall Sender. Also, carefully pull the rubber back from the hall sender connector and give it a check.

Couple of suggestions if that doesnt help...

1) When my exhaust was popping it was due to faulty leads, so I would check ignition system as per Danny_P.

2) Once when my timing was out it would hardly rev etc, and pinking occurred, which could be the grating noise your hearing, but I doubt it. Worth a check though.

3) Trouble starting was cured by re-checking all the vac connections and finding one had popped off.

[rubjonny]

this is the one i got:
http://simplybearings.co.uk/shop/p25677/12x19x5mm+R23+NBR+Oil+Seal/product_info.html

[oakgreengolf]

ok just been and brought new spark plugs, tryed a new coil, dizzy and arm, checked hall sender lead one was slightly frayed. sorted that still no change. Will try wd4o suggestion. I think i may have upset something when i took the dash out though. What i don't know. I really don't want to have to take it out again. Realy pis*ing me off now!!!. Midland vw is about 30 min from me might have to take it there at this rate