Don't know whether it's your coil or not, but you should be able to test your coil...

I pulled the following from Barney McNamara's archive of Toy mailing lists Toy 4x4 archive, where Jim Brink said the following about testing a coil (Rough Idle thread): </font><blockquote><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><hr /><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans"> Check the primary resistance of the coil (+ and -
terminals--should be .05-.07 ohms). Next, check the secondary resistance
(+ terminal to coil wire terminal--should be 11.4-15.6 thousand ohms).
Although not a likley culprit, I would also check the signal generator
(pick-up coil). The spec. for this is 140-180 ohms. </font><hr /></blockquote><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Not sure what year this is for, maybe it will help. The archive is a great resource <img border="0" title="" alt="[Wink]" src="images/icons/wink.gif" /> if you haven't already checked it.... Good luck...

Tom