87MJTIM

Never installed. Original owner

I will switch the display to show R/L condition Yes, I know it means the ECU reading rich. Stuck open or leaking FI?

No. ‘87 didn’t include one

Pretty steady. It was dropping but just 0.1 v every couple seconds. I left KO for 10 seconds

BTW I have a '90 ECU I have not performed the C101 elimination (yet) The REM shows the O2 sensor moving up and down, but it will stay at or near one reading for long time spans: 2.0 or less and never (or very seldom) higher. It stays in open loop most of the time. When it does switch to closed loop, the O2 sensor will swing from high to low. Also, fuel trims will drop below 128. (I guess that is good, since the ECU is trying to cut back on fuel consumption. Increased gas mileage.)

Just did these three tests C229 A-B: 5.7 ohms C229 B to ground: good, all zeros, not OL C229A KOEO 11.8v, (Battery shows 12.5v)

I thought most relays were NO, unless marked NC. Or is the wiring setup to account for NC condition?

I found the same part on Jeff Bezos's site, but is shows metal not ceramic.

I am reading the Renix Fuel Injection Manual for O2 sensors, pp 41-43. The last paragraph on p. 41 reads: The oxygen sensor heater relay is controlled by the ECU. When the ECU determines high exhaust gas tares and exhaust gas oxygen sensor heating is no longer required, the ECU completes the relay coil ground circuit. When the ground circuit is completed, the relay contacts open, and the exhaust gas oxygen sensor is disabled. Does that mean the relay is Normally Closed? If so, would swapping relays around mess up the operation of the heater relay and O2 sensors?

I'll try those tests later the is week.

The REM is registering 11.9-12 v from the heater relay. I do not recall testing the sensor end from the heater relay. Since the O2 sensor is getting power, I guess the heater relay is providing the power. (See 88 wiring diagram, 4.0L page 16.) What other test should I perform on the O2 system?

I don’t remember exactly. I think it was ceramic. I remember it was different the current one, which is metal.

I am having issues with my O2 sensors as well. I had the NTK, also. After a few weeks/months, the REM show the O2 voltage holding steady at ~2.3 to 2.4. It wouldn't vary much above or below those amounts. The REM showed I was constantly in OPEN loop. I am on a second O2 sensor now - bosch?. The voltage does move up and down on a wider range, but it is still stuck in Open loop. Does anyone have one that is more reliable? Not C.R.A.P.

Not yet

Taken a top Kile Knob, Franklin, Pendleton County.

Panorama of WVa

He must have CC. Although it looks like he cut it. That part is the rev counter for the CC system. The short cable (form the cluster to the rev counter) is NLA. Hold on to it or sell it. I found that Napa has a cable that is CC compatible for sale (from the rev counter to the trans/tcase)

Finally got around to it. (It's about time.) I am registered for Saturday.

You just need a phillips head screw driver and your two hands. Everything else is P-N-P. (Does the XJ have cruise control? If so, grab as many of the parts as possible: control box, rev counter, upper speed cable, etc.)

This "Man" does not see violet. I see purple.

My eyes! My eyes! Please fix that grill!

Could be e-fan relay. Could be coolant temperature switch. To test the relay, have the key on/engine off ,unplug the fan relay, drivers side fender, using a wire, jump relay connectors - 30/87. If can comes on, then move to the switch. Disconnect the switch at the harness. Jump the harness plug with the same wire. KO/EO. If fan works then switch is bad

My '87 did not come with one. I believe Jeep added it with the '88 model year. So, BeaterComanche86, yours may not have come with one, either.

We have an '05 CR-V. Original owners. 335,000 miles on the clock. 5 spd manual. I believe '06 was the last year for manuals in the CR-V. I would highly recommend a Honda (at least a CR-V).

Well that stinks. The table of contents for the manual shows that Ignition timing starts on page 60. So, maybe page 59 was/is blank.