Golf 4 misfire with no fault codes

[kalahari]

Hi all First time so please give me some slack if I do it wrong. 2001 1.8 turbo GTI AGU engine code has no fault codes but has a misfire on cyl #1. New plugs didn't fix the problem. If I change coil packs around #1 still misfires. Please help. Cheers.

[Shleng]

how have you diagnosed that it is cylinder 1 that is misfiring with no DTCs? have you checked for splits in sheathing causing shorts between the wiring running to the coil pack and the engine block?

[kalahari]

Old fashioned way,remove coil pack and put in a plug and earth the plug on the engine and start the engine. No spark arrives at the plug. Cyl 2,3 & 4 have spark if I do the same to them. If I swap coil packs around still no spark at cyl 1 but2 3 & 4 have spark.

[funtime]

Hi all First time so please give me some slack if I do it wrong. 2001 1.8 turbo GTI AGU engine code has no fault codes but has a misfire on cyl #1. New plugs didn't fix the problem. If I change coil packs around #1 still misfires. Please help. Cheers.

i have found that split breather pipes give the same problems listed..
if that fails try getting the trottle body cleaned.
all the above are a hell of a lot cheaper than a coil pack & HT leads.
hope it helps.

[smokey0123]

i would check the electrical contacts on the injector and the injector itself