96 Cherokee
NAXJA Forum User
- Location
- Indiana
Recently the 4.0 has been missing out on hot starts, like its running on 4 or 5 cylinders. Cold or cool starts, like after it sits for over 30 minutes, and no problem. Also, it takes from 15 to 60 seconds to clear up after it starts missing, ususally- sometimes longer. After searching this forum and talking with the mechanic at the dealership, it sounds like it may be a leaky injector. However, here's the kicker: it only misses out when the ambient temp is above 70 degress F, or thereabouts. It's been in the 50's here lately and when it is, no problem with hot starts. Could a leaky injector be temp sensitive? I am taking it in to the dealership Monday to have the fuel rail pressure checked, and whatever further diagnosis thay can do. 223,500 mostly rural mail route miles, almost everything on the engine(injectors, electronics, etc.) is untouched since new. Recently replaced the plugs, wires, cap, rotor, and forward O2 sensor.