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Unread 10-10-2013, 04:27 PM   #16
cody413
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1992 YJ Wrangler 
 
Join Date: Jul 2013
Location: Port Charlotte, Florida
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Which sensor should I * auto correct is a b****

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Unread 10-10-2013, 04:31 PM   #17
Luuca
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Quote:
Originally Posted by cody413 View Post
I will defiantly have to test the temp sensors. maybe just buy new ones since they are cheap. Which inner should've focus on more. Front or back one ? And if I unplug the 02 sensor and leave it unplugged . How will I know if it's bad ? Will there be no problem with it out ?

List of codes/standard meanings:
11: No ignition reference signal detected during cranking (bad hall effect) OR timing belt skipped one or more teeth; or intermittent loss of either camshaft or crankshaft position sensor
12: Memory Standby power lost (Battery or computer recently disconnected)
13: No change in Manifold Absolute Pressure sensor (MAP) from start to run
14: MAP sensor circuit open or shorted; voltage too low
15: No speed/distance sensor signal
16: Loss of battery voltage detected with engine running
17: Engine stays cold too long (bad thermostat)
21: Oxygen sensor signal out of range, possibly shorted
22: Coolant sensor signal out of range (or disconnected to set timing)
23: Intake air temperature signal out of range
24: Throttle position circuit out of range
25: Automatic Idle Speed (AIS) motor driver circuit shorted or target idle not reached, vacuum leak found
26: Peak injector circuit voltage has not been reached
27: Logic module fuel circuit internal problem or TBI injector does not respond properly to control signal
31: Evaporator Purge solenoid circuit open or shorted or Evaporator solenoid circuit
32: EGR system failure or Power loss lamp open or shorted
33: Air conditioning clutch relay circuit open or shorted ( Also will show up for rigs without AC)
34: Speed control vacuum or vent solenoid circuits open or shorted
35: Cooling fan relay circuit open or shorted
36: Wastegate control circuit open or shorted
37: Shift indicator light failure, 5-speed (blown bulb) OR Park/neutral switch failure OR Torque converter unlock circuit open or shorted, A-413 4-speed auto
41: Alternator field control circuit open or shorted
42: Automatic shutdown relay circuit open or shorted
42: Fuel pump relay control circuit
42: Fuel level unit - no change over miles OR Z1 voltage missing when auto shut-down circuit energized
43: Peak primary coil current not achieved with max dwell time OR Cylinder misfire
43: Problem in power module to logic module interface
44: No FJ2 voltage present at logic board OR Logic module self-diagnostics indicate problem OR Battery temperature out of range
45: Turbo boost limit exceeded (engine was shut down by logic module)
46: Battery voltage too high during charging or charging system voltage too low
47: Battery voltage too low and alternator output too low
51: Oxygen sensor stuck at lean position OR Internal logic module fault ('84 turbo only)
52: Oxygen sensor stuck at rich position OR Internal logic module fault ('84 turbo only)
53: Logic module internal problem
54: No sync pickup signal during engine rotation (turbo only) OR Internal logic module fault ('84 turbo only)
55: End of codes
61: "Baro" sensor open or shorted
62: EMR mileage cannot be stored in EEPROM
62: PCM failure SRI mile not stored
63: Controller cannot write to EEPROM
64: Catalytic converter efficiency failure
65: Power steering switch failure

If you threw a Code 22, its the sensor at the thermostat housing in the image and instructions I posted on this thread.

Got Multimeter?
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Unread 10-10-2013, 05:37 PM   #18
sprngrider
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Mine done exactly the same thing. Inspected the exhaust mani. and found it was cracked. I ran it like that for a while and burned up the o2 sensor too. New mani and new o2 sensor fixed it.
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Unread 10-10-2013, 05:40 PM   #19
laybackman
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Quote:
Originally Posted by cody413 View Post
I have a 92 wrangler with the 2.5. Im having a problem after it get to normal temp. It'll start and idle fine. But when I get to 4th gear and I'll b coasting and go to hit the gas to maintain speed. (still in 4th) and it will big and jerk like it's gonna stall. I'll have to stop accelerating and then try again and it will clear. Only happens in 4th gear. I've changed TPS, plugs, thermostat housing. Fuel pressure is good. Just had a head job done a month ago. Idk if a 02 sensor can do it. It's Also a manual.
Not the O2 sensor or it would light up the CEL. Bogging when you are in gear and you hit the skinny pedal probably means you have a timing lag issue. That could be timing chain slop. Think about what has to happen when you do this. The air fuel mix gets dumped into the engine while the timing has to ramp up just the right amount AND the drivetrain cannot hold the engine back.

What happens if you down shift when you hit the skinny pedal?

What happens if you throw in the clutch and chuck a rev or two then let the clutch out and hit the skinny pedal to increase speed.

At hot idle what does a timing light tell you? I expect the timing drifts quite a bit.
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Unread 10-10-2013, 06:02 PM   #20
cody413
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It only spudders for a second not in any gear but 4th. Sunday im gonna get under it and look through every thing. Im not a mechanic but sure can tell if something looks off. I let it idle for like 30 mins earlier no problems. Revd up too still no problems. As soon as I get it to 4th gear bogs for a sec an clears up.
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Unread 10-10-2013, 06:32 PM   #21
Siva283
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THe temp sensor in the thermostat housing is the one you are looking for. THe one in the back is only for the gauge and does not go to the ECM. Dont worry about the 02 sensor. If your temp sensor is off its not going into closed loop so it never reads the 02 sensor. It will not read the 02 sensor until the ECM knows the engine is 180 degrees or above.
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1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

[QUOTE=Magnum;14117863] I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim[/QUOTE]

[QUOTE=ldso;16498409]. It started with a $200 axle, and a few thousand dollars later I was done :)[/QUOTE]

[QUOTE=Luuca;16122017]diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...[/QUOTE]

[QUOTE=Overhead;17658665]this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.[/QUOTE]
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Unread 10-10-2013, 06:33 PM   #22
Siva283
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You have the 2.5 so you should have a 195 degree therostat and correct running temp is 210.
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1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

[QUOTE=Magnum;14117863] I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim[/QUOTE]

[QUOTE=ldso;16498409]. It started with a $200 axle, and a few thousand dollars later I was done :)[/QUOTE]

[QUOTE=Luuca;16122017]diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...[/QUOTE]

[QUOTE=Overhead;17658665]this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.[/QUOTE]
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Unread 10-10-2013, 06:34 PM   #23
laybackman
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Quote:
Originally Posted by cody413 View Post
It only spudders for a second not in any gear but 4th. Sunday im gonna get under it and look through every thing. Im not a mechanic but sure can tell if something looks off. I let it idle for like 30 mins earlier no problems. Revd up too still no problems. As soon as I get it to 4th gear bogs for a sec an clears up.
Something to keep in mind; You are talking about an engine and many of it's components that were designed in the 50's, is over 20 years old and has a couple of billion rpm's under its chain.

Age is a ***** for everything.

It could cost a ton of cash to find out exactly what this issue is, if it is just collective dirt/grime/small vacuum leaks/age/wear.

Read how older YJ's with carburetor often run like poop? They did not run like that when they were new did they.
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Chicks dig me.....Fish fear me

Getting older, I have developed some special skills. I have the ability to cough, sneeze, fart and pee at the same time.

"If we cannot afford to take care of Veterans, then we should stop making them."
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Unread 10-10-2013, 06:42 PM   #24
cody413
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What do you mean by 195 degree thermostat.? Nintendo gauge runs normal. It will go high but axle to normal within minutes. Could that be a symptom. Btw thanks for all the help guys. Idk what I would do without this site
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Unread 10-10-2013, 06:43 PM   #25
cody413
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My gauge* and it will go right back to normal temp.
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Unread 10-10-2013, 06:45 PM   #26
cody413
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Mine is fuel injected.,I just don't see why it would happen out of no where. With no codes
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Unread 10-10-2013, 06:59 PM   #27
laybackman
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Quote:
Originally Posted by cody413 View Post
Mine is fuel injected.,I just don't see why it would happen out of no where. With no codes
I know. My reference to the carburetor was just an example of older engines having hard to repair issues due to age/wear.

Use a timing light to check how much your timing fluctuates. My guess is timing lag due to a loose timing chain....along with other wear issues in the distributer/cam/etc.
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Chicks dig me.....Fish fear me

Getting older, I have developed some special skills. I have the ability to cough, sneeze, fart and pee at the same time.

"If we cannot afford to take care of Veterans, then we should stop making them."
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Unread 10-10-2013, 07:03 PM   #28
Siva283
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I gave more info than necassary. If your not overheating dont worry about that yet.

A 195 degree thermostat opens at 195 degree's. That is not an issue yet and from what it sounds like from what the gauge does is working properly. Focus on that temp sensor on the thermostat housing for the moment. My gauge does the same thing its normal. When it does that the thermostat is opening and it takes a few seconds for temps to normalize
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1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

[QUOTE=Magnum;14117863] I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim[/QUOTE]

[QUOTE=ldso;16498409]. It started with a $200 axle, and a few thousand dollars later I was done :)[/QUOTE]

[QUOTE=Luuca;16122017]diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...[/QUOTE]

[QUOTE=Overhead;17658665]this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.[/QUOTE]
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Unread 10-10-2013, 07:44 PM   #29
imstillatwork
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Quote:
Originally Posted by cody413 View Post
What do you mean by 195 degree thermostat.? Nintendo gauge runs normal.
I HAVE to get one of those
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Unread 10-10-2013, 08:43 PM   #30
cody413
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So your saying change the thermostat sensor first and see what happens from there. I'll have a new one in Saturday .,and I will post what happens
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