Throttlebody by-pass
I've done the by-pass on my 94 and 99. I've never had the the throttle valve stick. The reason for the by-pass is to allow cooler air to enter the throttlebody, than you will normally have. With 170-220 degree water passing through it, you will wind up with an incoming air temperature rise that is a function of the cfm supplied, and the amount of btuh 170 degree water is giving you at a specific flow rate from the water pump. Example, If you apply heat to 40 degree air, you will wind up with a temperature that is more than 40 degrees. (THUS, A TEMPERATURE RISE.) If you do not apply heat, your incoming air temperature will remain the same, plus a few factors such as heat conducted from the engine compartment. Therefore, it also requires a few other mods. to have it worth doing. You would need to replace the stock MAF sensor with another that isn't conducting heat. Or, you also might relocate the MAT sensor somewhere downstream of the stock MAF in a location that will get a good reading of the incoming ambient air temperature that is not subject to heat. (less expensive) It would be a good idea to have control over your cooling fan start temperature, and going with a 160 degree thermostat is just going to help you. Cool air has a higher air density that is 02 rich, compared with warmer air. This all creates more horsepower. Now let's talk about more fuel and more spark crammed into the mix. Now we are getting somewhere with some horses. Every little bit helps. If you want to do the by-pass, then do it. You should know why you're doing it, then other kinds of mods. planned, will be more productive.
