A100 Ignition Timing oddity (Was: A100 Fuel problems)

For anyone who may run into the same problem...

Patient was a 1988 A100 (2.0 RT engine) which broke down. Extremely difficult to start. If I can start it, then it will run for about 10-15 mins then cut out. Not driveable as stalls too easily. I'm using regular unleaded for which I believe the timing should be 8° BTDC. Bizarrely I found that advancing timing to around 30° it would start quite easily....

It took me about 6 months but I finally found the problem. It was the coil. I had actually tested this very early on but moved on because the resistances were in spec, and I was getting a spark anyway. It also fixed an odd misfire I had beforehand below 2000rpm under load.

I'm not sure I understand the theory. I guess I had a 'weak' spark which needed more advance to burn the fuel in time.

I'd never have found it without a car to swap bits with (or lots of cash). So it's worth noting that the fuel distributor, ISV, coil, warm-up valve & distributor from a A100 with the 2.2 KU all seem to work fine!

Gary

Reply to
Ovalking
Loading thread data ...

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.