throttle bodys

[blown XJ]

does anyone know where i can get a bored throttle body for an 89 jeep xj with a 4.0?

[Bounty__Hunter]

Hesco Inc. - High Performance Engine Service can machine your stock TB, or sell you the parts to convert to a '91+ throttle body. If you convert, I offer 62mm TB's and spacers for '91-'04 for cheap.

[blown XJ]

what parts do i need to change to run the newer style TB? are they parts i can find in a junkyard to bolt a 91 or newer tb on my 89? or do i have 2 buy the kit? is the newer tb better then just boring out my old one?
sorry for all the questions bounty hunter, still trying to learn about jeeps, i know alot but no where near as much as some people on this forum

[Bounty__Hunter]

You would need the kit to convert to the newer style TB, no junkyard parts out there.

I would contact Hesco or check out Hesco's forum to see if your stock TB can be bored out to 62mm. If it can be, it probably would be better to have it bored than to swap to the newer style TB.

[carnuck]

You want more power? Just swap in HO injectors (you'll be able to watch the gas gauge go down though!) With some adjustments you can do the HO intake as well (up til '95) with the whole injector set. You'll have to deal with the EGR pipe, dremeling the manifolds to fit and not suck air by the gasket and some home made washers for the studs (offset) Then the TPS needs to be hooked up. Haven't done it myself. This is from memory.

	Throttle position sensor A throttle position sensor (TPS) is a sensor used to monitor the position of the throttle in an internal combustion engine. The sensor is usually located on the butterfly spindle so that it can directly monitor the position of the butterfly throttle valve. The sensor is usually a potentiometer and therefore provides a variable resistance dependent upon the position of the butterfly valve (and hence throttle position). The sensor signal is used by the Engine Control Unit (ECU) as an input to its control system. The ignition timing and fuel injection timing (and potentially other parameters) are altered depending upon the position of the throttle, and also depending on the rate of change of that position. For example, in fuel injected engines, in order to avoid stalling, extra fuel may be injected if the throttle is opened rapidly (mimicking the accelerator pump of carburetor systems).

[blown XJ]

will the HO injectors hook up to my non HO fuelrail and wiring? without cutting and splicing wires and such

[carnuck]

Yes! 8^) I've done it with '95 injectors (I think newer are different connectors)

[blown XJ]

ok thanks carnuck