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Old 08-14-2014, 12:35 PM   #12
oliversexpedition's Avatar
Join Date: Aug 2005
Location: Dulles, VA
Posts: 2,014
I build a test harness with the insulation stripped off at intervals so that I can wrap all 4 plugs at once and ground at one point.

ECU and twice unit, correct voltage thru ignition switch?

Originally Posted by rl0089 View Post
So I have to ask because I have never checked for spark before. Do all 4 plugs need to be in and do all 4 need to be grounded or can I do one at a time? I tried with one in and I had no spark.

If spark is the issue, what would prevent spark from occurring? I have to find my back up DIC but the DIC in place is a brand new 2013 unit. The spark plugs are correct and brand new, just checked the gap before and are all perfect.

Any ideas?

Again, how do you check the cps? Thank you.
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