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73 challenger tach not working (help) #183587 01/04/09 01:33 PM 01/04/09 01:33 PM
Joined: Jul 2007 Posts: 99 Michgian M moparfun340 OP member
moparfun340 OP member M Joined: Jul 2007 Posts: 99 Michgian	The dash and gauges where taken out of my 73 challenger and the tach was working before removed and now that they are back in the tach is not working. It started out on 0 rpms and after I started it up the tach went to 2 rpms very slow and now it stays on 2 rpms. What should I check to see why it is not working. Let me know what you think. Thanks

Re: 73 challenger tach not working (help) [Re: moparfun340] #183588 01/04/09 06:01 PM 01/04/09 06:01 PM
Joined: Aug 2003 Posts: 8,000 Millersville, PA HemiChallenger master
HemiChallenger master Joined: Aug 2003 Posts: 8,000 Millersville, PA	Did you change your ignition? If you swapped out to an MSD and are not running a tach adapter your problem with not be fixed without one... Steve

Re: 73 challenger tach not working (help) [Re: moparfun340] #183589 01/04/09 07:36 PM 01/04/09 07:36 PM
Joined: Jun 2008 Posts: 1,822 Colorado D denfireguy top fuel
denfireguy top fuel D Joined: Jun 2008 Posts: 1,822 Colorado	Quote: The dash and gauges where taken out of my 73 challenger and the tach was working before removed and now that they are back in the tach is not working. It started out on 0 rpms and after I started it up the tach went to 2 rpms very slow and now it stays on 2 rpms. What should I check to see why it is not working. Let me know what you think. Thanks If the engine has not been modified, the tach may be stuck. Does the needle move freely? If the tension on the pivots are too tight or gummed up from age it will not move freely and not indicate properly. Usually if the tach goes bad, it smells like burned pop corn. Disassembling it reveals burnt resistors. If that has occurred, your best bet is to convert to modern electronics. See Moparts member Greg Garner. www.rt-eng.com Craig 2014 Ram 1500 Laramie, 73 Cuda Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango Only previous Non-Mopar: Schwinn Tornado

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