schardein Posted August 4, 2016 Share Posted August 4, 2016 On vacation, went to the local junkyard and first XJ I looked at had a column shifter, tilt column with cruise and delay wipers. Also had the extended idle switch and certified speedometer. I grabbed the cluster and switch. Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted August 5, 2016 Share Posted August 5, 2016 Nice !! So what do you want for the cluster ? Haha Link to comment Share on other sites More sharing options...
schardein Posted August 5, 2016 Author Share Posted August 5, 2016 It's funny-- I just switched to the full cluster with the red font and tach. I'm glad to finally have a trip odometer to track mileage and full gauges. I could take or leave the tach especially since I lost my transmission shift indicator (the MJ is column shift). Now that I have this, I may install it to get my trans indicator back and still have gauges and trip odometer. Link to comment Share on other sites More sharing options...
COMJNUT Posted August 5, 2016 Share Posted August 5, 2016 never seen the extended idle switch before, what does it do? ah google was a good friend this time. Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted August 5, 2016 Share Posted August 5, 2016 What year XJ did that come out of? I assume HO era? Link to comment Share on other sites More sharing options...
HOrnbrod Posted August 5, 2016 Share Posted August 5, 2016 It's funny-- I just switched to the full cluster with the red font and tach. I'm glad to finally have a trip odometer to track mileage and full gauges. I could take or leave the tach especially since I lost my transmission shift indicator (the MJ is column shift). Now that I have this, I may install it to get my trans indicator back and still have gauges and trip odometer. Yep - exactly what I would do. I've been looking for one of these clusters for years for just that reason. Nice score mate. :cheers: Link to comment Share on other sites More sharing options...
johnj92131 Posted August 5, 2016 Share Posted August 5, 2016 They are nice!. I found one in Las Vegas about 3 years ago. Also grabbed the extended idle switch at the same time. As long as you don't mind not having the tach, it is a nice package. One of my half finished projects is to fit the police package speedometer into a normal full gauge cluster with a match sweep tach from the 1987 full gauge cluster. Problem is the 87 tach is just enough different to make mounting it in the H.O. guage cluster an issue. Comjnut, the extended idle switch turns the electric fan for the radiator on when the cops are just sitting in the car with the engine running for what ever reason. Link to comment Share on other sites More sharing options...
HOrnbrod Posted August 5, 2016 Share Posted August 5, 2016 The extended idle switch applies a ground to pin 12 of the ECU on HO models. This allows the ECU to control the IAC motor to maintain a steady 1000 engine RPM no matter what accessories (A/C, alternator load from lights, radios, amplifiers, etc.) are ON. And extended idle only works when the the transmission is in N or P. Unfortunately pin 12 is missing from the connector on "normal" model ECU's, and a special Police ECU is needed for the EI feature on the 91-92 XJs, unless internal surgery is done on the "normal" ECU. I've seen in FSM's that In 93 and up models pin 12 was present on all the XJ ECUs. The extended idle feature has nothing to do with electric fan control; this is controlled by engine temperature as it normally is. Link to comment Share on other sites More sharing options...
schardein Posted August 5, 2016 Author Share Posted August 5, 2016 What year XJ did that come out of? I assume HO era? 1993. The XJ also had the skid plates (front, transfer, gas tank). ABS brakes (which means D35 rear axle), and what looked like the 28mm swaybar. I don't have my tools, so no calipers to actually measure. I scored a 28mm bar last week, and this XJ was wrecked pretty good in the front end, so I didn't grab it. Also had the mini console just for the tcase shifter (which I did grab) with shift pattern for a 242 (which I did not confirm, although the case was still there). Link to comment Share on other sites More sharing options...
schardein Posted August 5, 2016 Author Share Posted August 5, 2016 They are nice!. I found one in Las Vegas about 3 years ago. Also grabbed the extended idle switch at the same time. As long as you don't mind not having the tach, it is a nice package. One of my half finished projects is to fit the police package speedometer into a normal full gauge cluster with a match sweep tach from the 1987 full gauge cluster. Problem is the 87 tach is just enough different to make mounting it in the H.O. guage cluster an issue. Comjnut, the extended idle switch turns the electric fan for the radiator on when the cops are just sitting in the car with the engine running for what ever reason. So is 1987 the only year for a matching tach? Would the plan be to also swap in the fuel gauge from the 1987 cluster? Link to comment Share on other sites More sharing options...
schardein Posted August 5, 2016 Author Share Posted August 5, 2016 It's funny-- I just switched to the full cluster with the red font and tach. I'm glad to finally have a trip odometer to track mileage and full gauges. I could take or leave the tach especially since I lost my transmission shift indicator (the MJ is column shift). Now that I have this, I may install it to get my trans indicator back and still have gauges and trip odometer. Yep - exactly what I would do. I've been looking for one of these clusters for years for just that reason. Nice score mate. :cheers: Thanks. Longer story-- after driving home one day I noticed my oil pressure idiot light flickering. Uh oh. Had the parts for the gauge swap but hadn't done it. Went ahead and got it done. After warming up oil pressure drops to zero on the gauge. It will climb when punching the gas. Obviously there is enough pressure to keep it running... when I bought the MJ it had "piston rattle" upon startup, which goes away after 2-10 seconds. However it also has the same noise when under acceleration. I'm afraid the engine (150,000 miles) has been abused at one time. The other day I scored a 93 XJ with a 96 motor swapped in. Got it from a co-worker for cheap. Got the motor running with about 2 hours work and it seems healthy. Also, it is 4wd, so now I have the final piece I needed for a future 4wd conversion (4wd transmission). Already have a hp d30 w/factory 3.73 gears and large axle u-joints, 242 tcase, and rear d44 w/ 3.07s that will be swapped for 3.73. This project is still a ways down the road as I am working a LS swap in my CJ7 and have a CJ5 down to the frame in front of it. Link to comment Share on other sites More sharing options...
HOrnbrod Posted August 5, 2016 Share Posted August 5, 2016 They are nice!. I found one in Las Vegas about 3 years ago. Also grabbed the extended idle switch at the same time. As long as you don't mind not having the tach, it is a nice package. One of my half finished projects is to fit the police package speedometer into a normal full gauge cluster with a match sweep tach from the 1987 full gauge cluster. Problem is the 87 tach is just enough different to make mounting it in the H.O. guage cluster an issue. Comjnut, the extended idle switch turns the electric fan for the radiator on when the cops are just sitting in the car with the engine running for what ever reason. So is 1987 the only year for a matching tach? Would the plan be to also swap in the fuel gauge from the 1987 cluster? As John says, mounting the matching blue-letter Renix tach into your HO police cluster would be difficult. The only gauges that will physically swap between the two cluster cases w/o modifications are the oil pressure, voltmeter, temperature gauges. The cluster mounting bosses for the rest are very different. I'd sure like to see someone do it right though. You wouldn't want to do this: Image Not Found Link to comment Share on other sites More sharing options...
schardein Posted August 5, 2016 Author Share Posted August 5, 2016 Image Not Found Haha, yeah that would be a negative. Link to comment Share on other sites More sharing options...
gogmorgo Posted August 5, 2016 Share Posted August 5, 2016 Beyond the fonts not matching, I think I would be mostly okay with that. The blue gauge indicating something special going on. But at the same time, what's so special about the calibration? Seems like variation in tire pressure as they change temperature would negate any sort of precision in the gauge. Link to comment Share on other sites More sharing options...
HOrnbrod Posted August 5, 2016 Share Posted August 5, 2016 Years ago cop cars relied on the in-dash speedos for catching speeders, and all their factory speedometers were marked "certified calibration" because they had them tested periodically for accuracy - and to prevent lawsuits. Then with the use of the much more accurate external radar guns the in-dash speedometer periodic cals became obsolete for the police cruisers. This is an assumption on my part. :yes: Link to comment Share on other sites More sharing options...
jimoshel Posted August 5, 2016 Share Posted August 5, 2016 Got a couple dozen speedos sitting on the shelf. Better go check them. Link to comment Share on other sites More sharing options...
Pete M Posted August 5, 2016 Share Posted August 5, 2016 Longer story-- after driving home one day I noticed my oil pressure idiot light flickering. Uh oh. Had the parts for the gauge swap but hadn't done it. Went ahead and got it done. After warming up oil pressure drops to zero on the gauge. It will climb when punching the gas. Obviously there is enough pressure to keep it running... try changing your oil. I had a bad Fram filter cause that very issue. and just for the heck of it you could use a thicker oil too. Link to comment Share on other sites More sharing options...
gogmorgo Posted August 5, 2016 Share Posted August 5, 2016 So in other words there's nothing super special about the gauge itself, it's not a higher-end gauge or anything, just one that happens to go higher than the regular US-spec ones with a "sticker" on it? Link to comment Share on other sites More sharing options...
HOrnbrod Posted August 5, 2016 Share Posted August 5, 2016 So in other words there's nothing super special about the gauge itself, it's not a higher-end gauge or anything, just one that happens to go higher than the regular US-spec ones with a "sticker" on it? I think all the HO era dash speedos were the same with different faces. i.e. KPH, MPH, "Certified", etc. German speedo: Image Not Found UK speedo: Image Not Found Link to comment Share on other sites More sharing options...
schardein Posted August 5, 2016 Author Share Posted August 5, 2016 What makes it special is it has the transmisison shift indicator, with full gauges (minus tach), and a trip odometer. The only way to get a trip odometer with the blue font, only way to get full gauges with the shift indicator. At least as far as I know. I'll disassemble it when I get home and post pictures of any difference I see with the construction of the speedo. Link to comment Share on other sites More sharing options...
schardein Posted August 5, 2016 Author Share Posted August 5, 2016 Longer story-- after driving home one day I noticed my oil pressure idiot light flickering. Uh oh. Had the parts for the gauge swap but hadn't done it. Went ahead and got it done. After warming up oil pressure drops to zero on the gauge. It will climb when punching the gas. Obviously there is enough pressure to keep it running... try changing your oil. I had a bad Fram filter cause that very issue. and just for the heck of it you could use a thicker oil too. I've owned it for a couple years now, been through several oil changes. Always stuck with 10w-30 though. I did a google search and it actually seems like a somewhat common thing, although the only one I've personally come in contact with. Link to comment Share on other sites More sharing options...
gogmorgo Posted August 5, 2016 Share Posted August 5, 2016 I think all the HO era dash speedos were the same with different faces. i.e. KPH, MPH, "Certified", etc. And the Canadian spec: I've only actually ever seen one US-Spec one, but I thought they only went to 85mph. Like this one: Link to comment Share on other sites More sharing options...
johnj92131 Posted August 5, 2016 Share Posted August 5, 2016 The extended idle switch applies a ground to pin 12 of the ECU on HO models. This allows the ECU to control the IAC motor to maintain a steady 1000 engine RPM no matter what accessories (A/C, alternator load from lights, radios, amplifiers, etc.) are ON. And extended idle only works when the the transmission is in N or P. Unfortunately pin 12 is missing from the connector on "normal" model ECU's, and a special Police ECU is needed for the EI feature on the 91-92 XJs, unless internal surgery is done on the "normal" ECU. I've seen in FSM's that In 93 and up models pin 12 was present on all the XJ ECUs. The extended idle feature has nothing to do with electric fan control; this is controlled by engine temperature as it normally is. Don, Thanks for the correction! Link to comment Share on other sites More sharing options...
johnj92131 Posted August 6, 2016 Share Posted August 6, 2016 Here is a picture of the 87 tach placed (not mounted) in the Police Cluster. You can see how the tach is a close match for the police speedometer: Tach is clean, Speedo is covered with dust. Link to comment Share on other sites More sharing options...
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