redhawks2 Posted September 21, 2004 Share Posted September 21, 2004 Anybody know the correct resistance range for the spark plug wires on a '90 LS400? I have some new wires and want to check them out before installing. Thanks!! :D Quote Link to comment Share on other sites More sharing options...
ROYT Posted September 21, 2004 Share Posted September 21, 2004 according to the w/s manual the maximum resistance allowed is 25kohms per cord. If they exceed this they should be replaced. presumably new ones should be well below this but can not find the info in the manual. hope this might help...... Quote Link to comment Share on other sites More sharing options...
redhawks2 Posted September 23, 2004 Author Share Posted September 23, 2004 Thanks for the reply...on the planetsoarer site they have a tech article that says the wires for the V8 should be between 5-15, preferably on the high side. So I'm thinking that right around 20 +/- should be in the ballpark. Quote Link to comment Share on other sites More sharing options...
Lexls Posted September 23, 2004 Share Posted September 23, 2004 You will definitely be interested in my tutorial on this: http://www.lexls.com/tuneup.html As ROYT said, wires should read no more than 25 K Ohms. If you look at the end of my tutorial you'll see resistances compared. It's better if you have less resistance ;) I would love to hear what your readings are...please list them as I have listed them in my tutorial. Quote Link to comment Share on other sites More sharing options...
92LS Posted October 3, 2004 Share Posted October 3, 2004 Thanks Lexls for that write up! I belong to another forum for Ford Explorers but my dad owns a 92 LS 400 and every problem that can happen, has happened since he bought 3 years ago. Basically the only thing that hasnt been replaced is the tranny so this has definitely not been a reliable car by any means. My dad took his Lexus to the Wayzata dealership in the cities to find out it needed new cats because all the wires on the driverside shorted out causing damage to the cats but they wanted $3k for all that so we're doing everything ourselves. Thanks again for the write-up, it will help a lot! Quote Link to comment Share on other sites More sharing options...
sainikai Posted October 3, 2004 Share Posted October 3, 2004 According to my electrical engineering knowledge, wires with less resistance are good for carrying high current. Less resistance, more current at same voltage. ;) I would also like to take a moment to THANK LexLs for VERY useful instructions :) Quote Link to comment Share on other sites More sharing options...
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