My Bora PD130 (ASZ) takes a long time to start. You have to crank for a long time before it fires. Sometimes before it starts you'll hear it fire erratically, but it won't start, then after another number of seconds (anything from 2 to even 10) it'll finally start. Sometimes while I'm cranking the tacho is quite erratic as well, it'll go to perhaps 2.5 or 3k, then back down.
I scanned with VCDS and have the following errors from the ECU:
2 Faults Found: 16989 - Internal Control Module P0605 - 35-10 - ROM Error - Intermittent 16705 - Engine Speed Sensor (G28) P0321 - 35-10 - Implausible Signal - Intermittent Readiness: 1 1 0 0 0
I was thinking I'll try replacing the engine speed sensor, but I'm worried it could be something else as there's also the ROM error.
Has anyone else seen this? Does anyone have any pointers? Any and all help is much appreciated.