Hi, I have a '93 Toyota pickup with the 4 cylinder 22RE engine and about
110,000 miles on it. Anyway the engine is idling rough. It is almost a rhythmic idle (speeds up slows down) in a way you could almost set your watch to. It speeds up even worse if I turn on the A/C making it idle faster. I took it into a Toyota dealer and they told me it was the throttle body and it needed to be replaced. Unfortunately throttle body's run $600 new and can't be rebuilt according to several other fuel injector/carb shops around town here. The throttle body is a disposable unit basically. I called all the salvage yards here also and no one has a used throttlebody. I don't even know if this is really the problem anyway. They ran a diagnostic and cleaned the throttle body and came to this conclusion and of course a expensive one at that. It also sounds like it might be a vacuum leak and have tried spraying carb cleaner on all the vacuum line to see if the engine would idle faster momentarily and nothing happened. I first noticed this problem right after they did a rebuild back at 58,000 miles done by Toyota under warranty. Back then it only did it when I turned on the A/C on. Now it does it almost all the time with he A/C on or not. It also starts to act up when I press on the brake pedal. This all screams vacuum leak to me but I have tried everything and hell if I'm going to hand over anymore and replace the throttle body. I have talked to several fuel injector rebuild shops around town and had one place even look at it and they all seems to think it is not the throttle body. I don't what to do. The truck runs great in every way otherwise. I even felt sure enough to take it on a long 1,000 mile trip two weeks ago. It's just when I'm sitting at a stop light and the guy next to me thinks I want to race him because the engine is reving up and down like I'm doing it myself. Sorry, I realize this is a long post I just wanted to give everyone enough information to work with. Any help would be much appreciated!!!
Thanks in advance,
Carey