cordelldm

Is some sort of injector cleaning process helpful? Are injectors easily replaced, like spark plugs, or are we talking about real money?

I looked up Seafoam, and it looks promising. Do I have to do the brake booster thing? That sounds like it has potential for me to screw up. Or can I just put it into the engine oil? Also, is there a chance that using this type of product will break loose deposits that are now providing structure, i.e., could the engine be worse off if I get rid of some of the deposits?

Wouldn't swear that it is lifter tap because I don't know much about cars. It is a clicking noise that occurs at about 4-5 beats per second when idling in neutral with the air conditioner off. It isn't obnoxiously loud, though. I've only had the car for three months, and I'm trying to decide if I want to spend money on it. It has 166k. Doesn't need timing or other belts. Interior is very nice and exterior is good. The transmission doesn't shift as smoothly as I'd like between first and second, but it isn't bad. If it seems like everything is OK, I'll get a full tune-up and a few cosmetics and hang on to the car because I like it. Otherwise, I'll sell it and move on.

My 92 LS400 with 166K makes a mild clicking noise that sounds like sticking lifters or valves. A friend suggested changing the oil, but putting one quart of automatic transmission fluid in place of one of the quarts of oil, then changing the oil again after 1000 miles. He says that ATF is essentially high detergent oil and may clean well enough to fix the problem. He also says that this will not harm the engine and that it is an old mechanic's trick. Anyone know what to think of this? Thanks.