 Relay board, Doesn't look right |
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| Coondog |
 Jun 6 2016, 11:17 AM
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#1
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Advanced Member  Group: Members Posts: 2,089 Joined: 24-September 15 From: Apple Valley Calif Member No.: 19,195 Region Association: Southern California 
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Still trying to figure out barely running 75 1.8 L jet blues
Looked at relay board and found missing rear window defogger fuse which is no big deal but also saw missing power supply relay fuse ???? Unknown what this is for. Then unknown yellow wire.  |
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| Dave_Darling |
Aug 10 2016, 02:50 PM
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#2
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914 Idiot Group: Members Posts: 15,089 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Try unplugging the black/purple wire that goes from the coil to the tach. It probably won't help, but if it does then that is a big hint about what is causing problems. Remember that grounding out that black/purple wire will cut off the spark completely, so an intermittent ground or even just wonky resistance could cause strange problems.
The bouncing tach may be just from the tach itself, or it may be a lousy signal from the points. If the latter, that can cause fuel injection problems because L-jet uses the ignition signal to tell the injectors when to open. --DD |
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Posts in this topic
Coondog Relay board Jun 6 2016, 11:17 AM
timothy_nd28 Yellow wire goes to the starter Jun 6 2016, 11:21 AM Coondog Thanks, tach bounces when I get can get it to rev ... Jun 6 2016, 11:37 AM timothy_nd28 most of them do, the dielectric in the 40 year old... Jun 6 2016, 11:53 AM Coondog What is the power relay fuse used for ?? Jun 6 2016, 01:09 PM timothy_nd28 not used in your application. Ljet systems have t... Jun 6 2016, 03:12 PM Coondog Thanks again Jun 6 2016, 04:59 PM Jason74914 Timothy,
I know you are the FI guru, but my 18.L L... Jun 6 2016, 07:41 PM
ClayPerrine
Timothy,
I know you are the FI guru, but my 18.L ... Jun 6 2016, 08:05 PM timothy_nd28 It's good to question, let me show you the pat... Jun 6 2016, 09:17 PM Jason74914 Huh, very interesting! Sure makes diagnosis m... Jun 6 2016, 09:28 PM timothy_nd28 Electrically, the two rear ports are the same. Lo... Jun 6 2016, 09:33 PM Jason74914 I may have answered my own question. Looks like o... Jun 6 2016, 09:34 PM Jason74914
I may have answered my own question. Looks like ... Jun 6 2016, 09:35 PM timothy_nd28 Coondog: I would concentrate on the ignition side... Jun 6 2016, 10:14 PM malcolm2
Consider installing a [b]electronic ignition modu... Aug 10 2016, 08:42 AM Jason74914 Timothy,
Car sat for a few years. After draining ... Jun 7 2016, 05:35 PM oakdalecurtis Not sure if you fixed your electrical issues yet, ... Aug 10 2016, 04:45 PM |
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