Renix XJ Running Rich, Poor Mileage, Poor Idle, all connected?
04-26-2012, 09:27 AM
#121
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Year: 90,84
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Engine: 4.0,2.5
Mine dies immediately pulling the second relay, but takes a second when the fuel pump wire is pulled from the ballast resistor. Cruiser was helping a guy last month and IIRC it was determined that the fuel pump relay also provides power for other stuff like the injectors. So that would explain that. I'll be dipped! Such a nice diagram, all colored like that.
Btw, whoops! on the E-fan question in post #106, it was the AC clutch I was wondering about.
Btw, whoops! on the E-fan question in post #106, it was the AC clutch I was wondering about.
Last edited by DFlintstone; 04-26-2012 at 09:31 AM.
04-26-2012, 09:40 AM
#122
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Year: 1999
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yeah it makes me wonder how many people are using that diagram and pulling their hair out when it isn't making sense! Oh wait i know of one 
! Now i wanna cut out of work and go play with the jeep, didn't even drive it today so don't know if i changed anything by "playing" a little this morning.
! Now i wanna cut out of work and go play with the jeep, didn't even drive it today so don't know if i changed anything by "playing" a little this morning.
04-26-2012, 02:01 PM
#123
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Cruiser, would I be correct to inturpurt what's being said is that the 02 sensor, "sensor" wire (also) runs to 87a and is then energized while the ign is on, but 02 the heater is not activated bu the ECU?
The point of the question is that that would make it pretty darn easy to check the 02 operation if that was the case.
The point of the question is that that would make it pretty darn easy to check the 02 operation if that was the case.
04-26-2012, 02:02 PM
#124
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Who on here can take the old, WRONGLY labeled relay illustration and correct it and save it?
04-26-2012, 02:20 PM
#126
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04-26-2012, 02:48 PM
#127
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so whats everyone think of this
26-APR-2012
If you like it and want it then pm me an email address and i will send you a larger version of the file, spread the word!
26-APR-2012
If you like it and want it then pm me an email address and i will send you a larger version of the file, spread the word!
04-26-2012, 02:53 PM
#128
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That's more like it. Thanks.
04-26-2012, 04:38 PM
#130
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so tested at the "new" 02 sensor relay, voltage exactly where it should be, haven't tested the sensor location yet. Interesting fact though i went to a garage up the road to see if they happen to have a scanner that would hook up and they had the snap on verdict system: check out the link its freaking sweet!
http://buy1.snapon.com/catalog/item....re&dir=catalog
anyway they ran it and hooked it up and i was working with them reading it and the jeep never went into closed loop mode from the ecu, it constantly stayed in open loop. We ran it and drove it around for a total of about 45 minutes so it was plenty hot, also the only other reading they got was from the 02 sensor not switching voltage at all, if memory serves correct it was only back reading .04v. so what in the world would cause it to stay in open loop?
http://buy1.snapon.com/catalog/item....re&dir=catalog
anyway they ran it and hooked it up and i was working with them reading it and the jeep never went into closed loop mode from the ecu, it constantly stayed in open loop. We ran it and drove it around for a total of about 45 minutes so it was plenty hot, also the only other reading they got was from the 02 sensor not switching voltage at all, if memory serves correct it was only back reading .04v. so what in the world would cause it to stay in open loop?
04-26-2012, 05:01 PM
#131
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Year: 1990
Model: Cherokee (XJ)
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so tested at the "new" 02 sensor relay, voltage exactly where it should be, haven't tested the sensor location yet. Interesting fact though i went to a garage up the road to see if they happen to have a scanner that would hook up and they had the snap on verdict system: check out the link its freaking sweet!
http://buy1.snapon.com/catalog/item....re&dir=catalog
anyway they ran it and hooked it up and i was working with them reading it and the jeep never went into closed loop mode from the ecu, it constantly stayed in open loop. We ran it and drove it around for a total of about 45 minutes so it was plenty hot, also the only other reading they got was from the 02 sensor not switching voltage at all, if memory serves correct it was only back reading .04v. so what in the world would cause it to stay in open loop?
http://buy1.snapon.com/catalog/item....re&dir=catalog
anyway they ran it and hooked it up and i was working with them reading it and the jeep never went into closed loop mode from the ecu, it constantly stayed in open loop. We ran it and drove it around for a total of about 45 minutes so it was plenty hot, also the only other reading they got was from the 02 sensor not switching voltage at all, if memory serves correct it was only back reading .04v. so what in the world would cause it to stay in open loop?
What do you get if you probe the O2 sensor connectors with it running? Got 12 volts to the heater?
04-26-2012, 05:12 PM
#132
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Could be I guess but just put a brand new one in on Saturday, Ntk brand, I'm gonna try and check at the sensor in a little while
04-26-2012, 06:02 PM
#133
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well at the sensor no 12 volts on the orange, .02, at the relay 12 on pin 30, at the sensor 5 on the ecu side? hmmm, might be some more wiring gremlins somewhere! i only have a digital meter so i cant see the fluctuation while running
04-26-2012, 06:17 PM
#134
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A should have 12V, B should be good ground, C should be fluctuating voltage.