Looking for some help before I give up on my 88'
05-08-2014, 05:04 PM
#31
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I think that is #4 Freedgr. BD, my wires to the lower sensors were miss-routed so then it warmed up, the heat shield would expand and ground out some sensor wires, then act like yours. Only took me about a year to figure it out. As far as a digital meter, the $5 one at Harbour Freight will actually work, at least for a while. Then I guess you can get them for $20 all over. You pretty much need one to do much with a Renix Jeep.
Anyone with an 87 to 90 Renix Jeep has two or three minutes to see that their
CPS is putting out at least .35 AC volts. I don't mean to come off rude, but if you can't connect a meter and turn the key, we may not be much help.
AC voltage CPS test; Small clips on the meter leads really helps. (you need contact with those little pins while it cranks)
Unplug the connector at the back of the manifold with wires going down to the bell-housing/cps. (it's a three wire plug, with only two wires)
Probe the two wires to the cps with the meter set on AC volts. (a 200 scale on mine).
Crank the engine and note the voltage. (jump it if your battery is low)
Mine somehow works with only .3 my wiring/grounds must be pretty spiffy. .5 seems to be a good mark. One article talked of .5 to .8. **Update, it soon failed. I installed Napa #css980 in my 90, that part will work back to 87. You can also check for 200 Ohm's resistance, +/-- 75, but the ACV is what the ECU is using.
Anyone with an 87 to 90 Renix Jeep has two or three minutes to see that their
CPS is putting out at least .35 AC volts. I don't mean to come off rude, but if you can't connect a meter and turn the key, we may not be much help.
AC voltage CPS test; Small clips on the meter leads really helps. (you need contact with those little pins while it cranks)
Unplug the connector at the back of the manifold with wires going down to the bell-housing/cps. (it's a three wire plug, with only two wires)
Probe the two wires to the cps with the meter set on AC volts. (a 200 scale on mine).
Crank the engine and note the voltage. (jump it if your battery is low)
Mine somehow works with only .3 my wiring/grounds must be pretty spiffy. .5 seems to be a good mark. One article talked of .5 to .8. **Update, it soon failed. I installed Napa #css980 in my 90, that part will work back to 87. You can also check for 200 Ohm's resistance, +/-- 75, but the ACV is what the ECU is using.
05-08-2014, 05:07 PM
#32
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Year: 90,84
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Oh! I had that above "canned"....
05-08-2014, 05:28 PM
#34
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Im wondering if its getting hot and causing this issue..http://www.jeep4x4center.com/ignitio...-33002299.html
05-08-2014, 09:38 PM
#35
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Meant under coil oooppps and theres a module under the coil ...at 2.25 on video theres a module ....Video Link: http://www.youtube.com/watch?v=sjNO3589YzY
05-09-2014, 05:48 PM
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OK so hopefully I did it right, I got a meter and set it to the RX1K on the ohms side and made sure it was zeroed out. When I probed in the connection for the CPS going into the ECU it shoot up to a little less than 8 on the meter. I think I'm doing it right
05-09-2014, 06:49 PM
#38
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No. Unplug the CPS. Probe the connector going to it, one probe on each connector. Set your Meter to AC volts. Have someone crank the Jeep over and read the meter.
Last edited by cruiser54; 05-09-2014 at 08:33 PM.
05-09-2014, 07:48 PM
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05-09-2014, 07:54 PM
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05-09-2014, 08:12 PM
#42
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I think he meant to type AC volts. If your meter is auto ranging it might not pick up such a low AC or (alternating current) voltage. Auto ranging automatically selects the range and if it's not fast enough or sensitive enough than it might not pick up anything. Come to think of it you shouldn't have that many options on volts. It seems you are putting your meter on resistance or ohms instead of volts.
05-09-2014, 09:31 PM
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Oh Gosh. That is an analogue meter. Guess we could have been more clear. When I said "digital meter", the "digital" really mattered! I wonder if you could take it back? Even on the 10 volt AC scale no way will you be able to tell between .2, and .5 ACV. Likewise on resistance telling between one or three ohms is likely not possible. I gotta run...
05-09-2014, 11:09 PM
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Oh Gosh. That is an analogue meter. Guess we could have been more clear. When I said "digital meter", the "digital" really mattered! I wonder if you could take it back? Even on the 10 volt AC scale no way will you be able to tell between .2, and .5 ACV. Likewise on resistance telling between one or three ohms is likely not possible. I gotta run...