Thanks guys I will look into that ISC Sensor. I HAVE A problem tho! Tonight when I went to turn on my headlights they didnt want to come on. After I drove it back home and shut the Jeep off they came on, but my switch made a loud buzzing noise! IS my switch bad? I also found a Blown fuze underneath in the fuse box? I dont have any tailights but I still have headlights after I replaced the fuse. I also dont have any Stop Lights. I replaced all of the bulbs for my back lights a month ago. Any Idea of what it could be? If so Please help me fix this! Or should I just go ahead replace all of the fuzes and see what Happens?

 

I replaced my Bendix/Deka injectors by Bosch, the ones used in Mustang 5.0 V8
also replced the spark and ignition wiring, runs fine but when engine warms the idle
is about 1500 RPM instead of the 600~700RPM normal. Checked MAP and found the output voltage was 1.1v when idle (gas pedal released), it should be between 1.5v to 2.1v. So I replaced the MAP, the results where the same, no improvement in the hi idle.
Then cleaned the stepper motor and the hole, also the intake, all seemed quite clean, no change. Discarded the problem was the CPS because was replaced last year (without needing it). Tested the TPS voltage at idle and was 0.594v instead of the 0.80v nominal, took it to 0.8v regulating the TPS and it became worse, idle about 2K rpm or more, then took it to 0.50v, idle fine when cold but the warm hi idle keeps the same. Tested the voltage at EGR solenoid, 12V OK when cold, tested EGR valve moving it and the engine reduce rpm when idle and runs fine about 700rpm. The EGR solenoid seems not to be taking vacum to the EGR trasducer, I inyected vacumm with an injection and seems to be ok now, but the problem persists. I discovered a temporal solution, make a "T" connection at the MAP intake from the throtlle body,
that rubber piece with two holes, and cause a controlled vacum leak with a medical flow-pass restrictor, when I open the rpm reduces to normal, inverse of the logical, when my MAP vacum pipe broken 4 years ago it idle very high, now is the inverse, when is idling very high when warm, causing a vacum leak to the MAP make it believe the engine is running quieter and reduce the fuel pulses' width taking rpm to normal 650-700.
Any cue about it? anybody experienced this? my XJ is RENIX and is about 118K miles.
Air filter is new, also fuel, oil and oil filter, engine runs great quiter than with leaking Bendix injectors and with new wires very soft, but is a coincidence that in the same moment of the injector replacement this new problem arosen, any information or guide will be very helpful, all EGR tests were done and are not very clear, I suspect about EGR solenoid but that part is no available anywhere.
Regards

Carlos from Montevideo