[tirwin]

Low cold control pressure means an overly rich mixture on cold start. As control pressure gets lower, the fuel mixture gets richer and vice versa. The WUR will have to be adjusted.

Tony has posted a method to test the fuel accumulator. Do a search with those words under his username and it should come up. Do the test and you can either replace it or you'll have peace of mind that it's not the culprit.

Idle surging on cold start and warm start problems have some common causes. 1) vacuum leaks 2) leaking cold start injector 3) leaking fuel injectors/uneven fuel spray and 4) improper basic idle.

Cold start injector is a bugger to replace. I'd suggest adjusting the WUR and then rule out the other 3 possible causes before tackling the cold start injector.