TJ Hard Start & rough idle(Everyone help plz)
Hopefully Jerry or someone else wise will get wind of this one. Several months ago , my 98 TJ had small problems while starting and bigger problems when reaching speeds over 55mph. It would sputter and jerk really bad when reaching those speeds. I replaced the wires, plugs, ignition coil, rotor, and distributor cap. Still no change. I then took it in to get looked at. They replaced the front axle. After that, the sputtering at high speeds went away. However, I still experienced a hard start, then a rough idle. The first attempt to start fails. The second works, most of the time, followed by a temporary rough idle. I also feel that ever-so-slight sputter when I take my foot off the gas at high speeds.
About 3 months ago, I replaced the IAC Valve and cleaned out the throttle body. This did nothing. Over the last few months I added fuel injector cleaner to the tank twice, with no avail. I also attempted to clean the fuel injectors manually, but could not get them removed (must've done something wrong). Just today, I replaced the O2 sensor. Still, nothing. I am assuming the next step is to get to the fuel filter and maybe take another crack at the fuel injectors.