rrperez10 Posted February 18, 2015 Report Share Posted February 18, 2015 I've searched some threads and I can't really find a definite answer to my problem, I found a couple people that had similar issues but I'm still not sure about what I'll need to fix my car. So I was driving home and my car just turned off on me one day driving home, and it would crank but not start. I put a new coil in and it started but then it shut off after driving it for a little. The coil was under warranty and replaced it. It ran fine for about 20 minutes and then it turned off again. I found out that coil coil keeps shorting out and not producing spark. Will replacing the knock box fix the problem? If not, does anyone know what will? Quote Link to comment Share on other sites More sharing options...
mr-starion Posted February 18, 2015 Report Share Posted February 18, 2015 If its a 86 with a black plastic ignitor box they are known for failing, theres plenty of posts on it, tap it a few times and see if it starts. Thats a trick i learned on here Quote Link to comment Share on other sites More sharing options...
quikconq Posted February 18, 2015 Report Share Posted February 18, 2015 I've never heard of a faulty knock box causing it to burn outA coil... 1 Quote Link to comment Share on other sites More sharing options...
Skullzaflare Posted February 18, 2015 Report Share Posted February 18, 2015 I've never heard of a faulty knock box causing it to burn outA coil...i doubt the coils are failing, just in the time it takes to get the coil swapped out and reinstalled the knock box has cooled downif its a black plastic box (87 and older) it can cause the issue, FYI, if it is that box, your tach will not move while cranking if the knock box is bad Quote Link to comment Share on other sites More sharing options...
quikconq Posted February 18, 2015 Report Share Posted February 18, 2015 i doubt the coils are failing, just in the time it takes to get the coil swapped out and reinstalled the knock box has cooled downif its a black plastic box (87 and older) it can cause the issue, FYI, if it is that box, your tach will not move while cranking if the knock box is bad He wrote saying the coil is failing...if the coil tests bad,,something burnt it. Quote Link to comment Share on other sites More sharing options...
rrperez10 Posted February 18, 2015 Author Report Share Posted February 18, 2015 I'll look at the tach and see what it does, I already bought another knock box and it should get here soon. Thanks for the help guys Quote Link to comment Share on other sites More sharing options...
Skullzaflare Posted February 19, 2015 Report Share Posted February 19, 2015 He wrote saying the coil is failing...if the coil tests bad,,something burnt it.no he said it shut off, he assumed the coil was shorting because it wasnt producing spark, which it wont do if the knock box goes out let us know if it fixes it Quote Link to comment Share on other sites More sharing options...
rrperez10 Posted February 24, 2015 Author Report Share Posted February 24, 2015 Just following up with you guys, I put a new knock box in and the car started right up! Quote Link to comment Share on other sites More sharing options...
RonnieJ Posted February 25, 2015 Report Share Posted February 25, 2015 My car did the same last summer. Thats wht those knock boxes are cover in that gold heat foil now Quote Link to comment Share on other sites More sharing options...
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