Hi,
thanks for your experience with FPR. I am afraid you are right. I seems to be prety simple device and there is a chance that it would not affect engine the way I described problem.

Today I got out Fuel Injection Relay and opend its housing to reach its small electronics board. I am glad I did it because I found three or four cracked soldered contacts. In the begining could not see anything wrong but on strong light and changing view angles I was surprised to see thin cracks.
I resoldered these and put relay back. Could not see if this would make diference because car was worm and day was hot, when problem is less visible.
I will test it tomorrow morning on my way to work.

I also removed what I think should be OverDrive realy and checked it the same way. Did not see any cracked soldering. I read that this relay also tend to break soldering due to car vibration but I am not avere how would that problem manifest.

tike