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Jeep Wrangler YJ
YJ General Discussion
5 volts TPS
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<blockquote data-quote="deadpool1" data-source="post: 441212" data-attributes="member: 21229"><p>using what method ? the dash meter temp does not use the 2 pin ECT sensor that the ECU uses</p><p>the dash sensor is a 1 wire rear of head</p><p>the ECU ECT sensor 2wire on the side of the thermostat housing</p><p>the gauge has zero to do with the engine EFI operation. (well if it tells the truth it can sure. it's not. )</p><p>I have real scan tool you do not have and can scan the ECT and see it hit 180f. and holds.</p><p></p><p>learn to run the engine, and feel the top rad hose and when the hand flies back you yell, ouch that is 180f hit.(a cave man test, but SOP)</p><p>or use a $15 IR heat gun to the thermostat housing and see 180f hit (see photos)</p><p>gee ask anything, all questions fully fleshed out have answers<strong>. all questions are good.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite4013" alt=":sneaky:" title="Sneaky :sneaky:" loading="lazy" data-shortname=":sneaky:" /></strong></p><p></p><p></p><p></p><p>which is new. that ia have a new thermostat and will replace. would that have anything to do with? just asking..</p><p></p><p></p><p>the dash meter dead has 3 simple causes (if lucky and luck happens:</p><p>the 1 wire to the rear sensor on top left (right facing )cylinder head has fallen off. bing. (just pulling it off and back one can fix it) "RUST"</p><p>the sensor pipe threads are rusty or has silly caulk or teflon taped on it so clean it. and it works, the thread is GROUND.</p><p>DASH:</p><p>the dash display has a flex PCB there, and the meter screws there rust and fail. on almost all jeeps this old in fact</p><p>here is mine, center dash cluster , comes out easy</p><p>that is raw copper PCB.</p><p>that is now brown.or omg GREEN that means it is corroded. and even the washers there are rustly here.</p><p>solution:</p><p>I clean the copper traces, screws off, with pencil eraser gently until shinny new copper look., end. (like copper cooking pot looks cleaned) or new copper wire looks.</p><p>same reason for warning lamps bad and Illumination in park.</p><p>[ATTACH=full]122535[/ATTACH]</p><p></p><p>the 1 wire sensor last photo</p><p>the IR gun photo 2.</p><p>cold engine just idling can take 30 minutes to reach full 180f. also old thermostats can be slow or only go to 160f. or too hot, lots of failure modes.</p><p>[ATTACH=full]122536[/ATTACH]</p><p></p><p>[ATTACH=full]122537[/ATTACH]</p><p>hiding behind injector 4.</p></blockquote><p></p>
[QUOTE="deadpool1, post: 441212, member: 21229"] using what method ? the dash meter temp does not use the 2 pin ECT sensor that the ECU uses the dash sensor is a 1 wire rear of head the ECU ECT sensor 2wire on the side of the thermostat housing the gauge has zero to do with the engine EFI operation. (well if it tells the truth it can sure. it's not. ) I have real scan tool you do not have and can scan the ECT and see it hit 180f. and holds. learn to run the engine, and feel the top rad hose and when the hand flies back you yell, ouch that is 180f hit.(a cave man test, but SOP) or use a $15 IR heat gun to the thermostat housing and see 180f hit (see photos) gee ask anything, all questions fully fleshed out have answers[B]. all questions are good.:sneaky:[/B] which is new. that ia have a new thermostat and will replace. would that have anything to do with? just asking.. the dash meter dead has 3 simple causes (if lucky and luck happens: the 1 wire to the rear sensor on top left (right facing )cylinder head has fallen off. bing. (just pulling it off and back one can fix it) "RUST" the sensor pipe threads are rusty or has silly caulk or teflon taped on it so clean it. and it works, the thread is GROUND. DASH: the dash display has a flex PCB there, and the meter screws there rust and fail. on almost all jeeps this old in fact here is mine, center dash cluster , comes out easy that is raw copper PCB. that is now brown.or omg GREEN that means it is corroded. and even the washers there are rustly here. solution: I clean the copper traces, screws off, with pencil eraser gently until shinny new copper look., end. (like copper cooking pot looks cleaned) or new copper wire looks. same reason for warning lamps bad and Illumination in park. [ATTACH type="full" alt="cluster center.jpg"]122535[/ATTACH] the 1 wire sensor last photo the IR gun photo 2. cold engine just idling can take 30 minutes to reach full 180f. also old thermostats can be slow or only go to 160f. or too hot, lots of failure modes. [ATTACH type="full" alt="stat-housingIRGUN.jpg"]122536[/ATTACH] [ATTACH type="full" alt="sender-temp.JPG"]122537[/ATTACH] hiding behind injector 4. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
5 volts TPS
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