I still haven't fixed the problem. The truck runs pretty good in drive when it is warmed up. Since the weather has gotten colder, the truck idles worse when first started. It surges badly before it is warm. It passed Ca smog easily and I have been driving it. I lost my job, so I haven't had any extra money to get the fuel injectors cleaned or take it to a shop.
I don't know if the switch could be the problem. The truck idle steps up and down as it is put into park/drive. Perhaps I have a ground wire problem. I will check that out as soon as the weather clears. It's snowing now. Thanks for the suggestion.
Are you using the stock intake? The heater that goes between the TBI and intake sometimes leak. My old one did. where the hose was crimped on. Perhaps you are losing fluid there. Unless you are seeing oil in the water or water in the oil, you are probably OK. Another sign is water and white smoke coming from the tailpipe. If you think it's a head gasket problem, I would recheck the head torque before repalcing the gasket. Sometime retorqing the bolts will seal a minor leak. Do not over torque. Did you have the heads surfaced?
I noticed my plugs had deposits on only one side too. Not sure what causes that. If and when I get some money together I am going to have
Witchhunter do my injectors. I think they could be part of the problem I am having. Of course the wiring on my truck is 19 years old, so there could be a problem with it.
Sorry I don't have a solution. After all the time and moiney I have spent it would be nice to have an answer to share.
Best regards Brad