Search results

One thing to note - the manifold was wet with standing gasoline, that's how much was leaking through that injector. Incredible that it still ran!

Bad fuel injector. Pulled the rail and replaced with a known good set and we are back to purring like a (tractor) kitten.

OK, I have voltage on the O2 sensor heater when cranking/running. Went out and got a fuel pressure tester. When placed into run, the pressure blips to 20psi briefly then drops back down again. When cranking, it goes to 40psi, but as soon as you let off the key it drops to 4-5 psi, then 0. Like...

Thx. I'll check it when cranking tomorrow.

Well I found some 1995 doco and the colors seem to match up. I have conductivity between the O2 sensor heater circuit source wire and pin 9 in the PDC (fuel pump relay).

I'm wrong, looks like. It is titled as a 93 and was sold to me as a 93 but it's a 94. I cannot find a ballast resistor or ballast resistor bypass relay. Can anybody tell me where the O2 sensor heater circuit power comes from on a 94? Bottom of one of the relays in the PDC? All diagrams I've...

I appear to have 0V on the Oxygen Sensor pin 3, which if my reading is right shoudl have full battery voltage in run. Tracing that wire back now (already backtapped it at the end of the fuel rail, still 0v)

No change in idle quality/ease of starting or idle speed when spraying TB cleaner around the manifold or the injector bases. Pulled the plugs, 1-3,5,6 all look tan, little bit old but nothing crazy. 4 is dark/wet. Gonna try swapping out injector on 4 to see if it's stuck open possibly. Coolant...

Disconnecting TPS and Coolant sensor results in expected codes - no perceptible change in behavior.

OK The Patient: 1993 Jeep Cherokee Country 4.0/AW4/231 History : Had an exhaust leak, cracked header at down tube join and leak at back of head (missing nut/washer on last stud, missing bottom/rear manifold bolt). Replaced exhaust manifold, replaced all hardware, torqued to spec/in pattern. All...