1988 Chevy Silverado code 42

Well, I think I got it, I started looking at the wires and all the connections, and noticed that the EST wire had a flat spot in it from being pinch under the black cover that covers all those electrical goodies on the firewall. So I replaced that section of wire, cleared the code, drove it around for a bit, seems to be fine now. I even checked the timing again just to make sure. And yes I cleared the code again after I check the timing. Thanks guys for your help.

Hi
I borrow this thread, hope it´s OK. I have the same problem with my TBI code 42. And I have checked the Pin A blk/red from the control module to ground and theres no ground there. Is my ECM bad or can I hook this blk/red cable directly to ground and see if this solve my problem?