86MJV6 Posted March 5, 2013 Posted March 5, 2013 WTB a cluster with tach and gauges (no idiot lights) for 1986 Comanche X, 2.8 V6.
onlyinajeep726 Posted March 5, 2013 Posted March 5, 2013 Your best bet is to find one from no later than a '90 XJ/MJ and swap that in. You'll need the sending units from the same Jeep. Other than that, you can bring it to a shop and have the mileage dialed in to the exact same as your current cluster to keep it legal.
86MJV6 Posted March 5, 2013 Author Posted March 5, 2013 Thanks, so far all I have seen have been 91 and newer. Didn't think about the mileage, will do that when I find one. I think it's two Sending units that need swapped from what I read, the oil and temp.
MJRemi Posted March 5, 2013 Posted March 5, 2013 I have one from a 86 2.5 but I don't know if it's compatible. If it is, I'll sell it cheap.
86MJV6 Posted March 5, 2013 Author Posted March 5, 2013 Does it have an adjustment on the back, either a resistor or potentiometer of some sort?
MJRemi Posted March 5, 2013 Posted March 5, 2013 Does it have an adjustment on the back, either a resistor or potentiometer of some sort? No, I don't see anything like that.
86MJV6 Posted March 6, 2013 Author Posted March 6, 2013 Thanks, doesn't seem like it will work and Appreciate the offer...
zackcj7 Posted March 6, 2013 Posted March 6, 2013 I have one from a 86 2.5 but I don't know if it's compatible. If it is, I'll sell it cheap. If it's the one with a Tach for an '86 and 86MJV6 doesn't want it, I do.
MJRemi Posted March 6, 2013 Posted March 6, 2013 If it's the one with a Tach for an '86 and 86MJV6 doesn't want it, I do. PM sent.
jimoshel Posted March 6, 2013 Posted March 6, 2013 I have IP'S with tach from '84, '85, and '86 XJ'S 2.5 and 2.8 engines. I also have IP with tachs from '87 '88, '89 and '91 XJ, 2.5 and 4.0. None of them has a pot or anything else for adjustment that can be seen. I haven't torn into any of them to see if there's something on the inside. Also in neither the FSM for the 1986 and the 1989 XJ-MJ there is nothing about tach adjustment. The schematic just shows a wire from the ign module to the IP.
jimoshel Posted March 6, 2013 Posted March 6, 2013 I'm wondering if the tachs themselves are made for each usage, meaning you need the tach made for that engine, number of cylinders. If so, then I see no reason a 2.8 and a 4.0 can't be interchanged. Perhaps some one with a parts manual, DON?, could check the numbers and come up with something.
86MJV6 Posted March 6, 2013 Author Posted March 6, 2013 I Believe so, don't have anything to back that up tho. I assumed 90 and older 6 would have been compatible. And the 4 would not have been accurate on my 2.8. I'll keep researching it.
jimoshel Posted March 6, 2013 Posted March 6, 2013 Set the IP on your work bench. Remove the front plastic cover. On the back is 5 screws, 2 big ones and 3 little ones. Remove them. There is also a screw on the lower right of the tach face. Remove it. Pull the tach out.Behind the tach is a circuit board with a pot on it. That pot is the adjustment. I can't post pics but if anyone wants one email me. To calibrate the tach you will need some jumper wires and hook it back into the XJ circuit or if you have access to a power supply and signal generator use them. For the 4 cyl 66.7 HZ=2000RPM. 166.7 HZ=5,000RPM For the 6 cylinder 100HZ=2000RPM. 250HZ=5000RPM.
86MJV6 Posted March 7, 2013 Author Posted March 7, 2013 Thanks, I appreciate the info. I don't have access to a signal generator. I think I can get by using an o-scope or the hz function on the dvm. Sounds like I could have used the one from a 2.5.
jimoshel Posted March 7, 2013 Posted March 7, 2013 Yep. They're all the same. Just calibrate the pot. Just a thought. If you want to send me your unit and I'll send you one like you want. You pay shipping both ways.
86MJV6 Posted March 7, 2013 Author Posted March 7, 2013 I ordered one today. Appreciate everyone's assistance and info. Thank you.
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