Coil testing part II
02-09-2005, 10:46 PM
#1
AudiWorld Super User
Thread Starter
Coil testing part II
This time around, I laid the coil pack on the valve cover and made sure all 5 plugs were touching metal for ground and I got crisp blue sparks from all 5 plugs.. hmmmm. Bad POS maybe? 
The pursuit is still on.
The pursuit is still on.
02-10-2005, 03:10 AM
#2
Not enough. (edit - link added)
Since most bad coils tend to misfire at higher boost, your test is inconclusive. Buy a spark tester and test each plug separately, gradually widening the tester gap. See if one won't jump as far as the others.
Don't forget to unplug the injectors.
There is a more thorough write-up on Audifans.com in the S list archives.<ul><li><a href="http://www.sjmautotechnik.com/trouble_shooting/S4_Ignition.htm">This might be a little more help (SJM)</a></li></ul>
Don't forget to unplug the injectors.
There is a more thorough write-up on Audifans.com in the S list archives.<ul><li><a href="http://www.sjmautotechnik.com/trouble_shooting/S4_Ignition.htm">This might be a little more help (SJM)</a></li></ul>
02-10-2005, 05:59 AM
#3
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One way to know if it's the PS or coil .....
.... is to find someone with another S4/S6 and swap out the entire top set of 5 coils. Put his on you car, drive hard a little., and if you have full boost again, then you know it's the coil and not the POS. If it still stutters at high bosst, then it's the POS.
Robert
Robert
02-10-2005, 07:43 AM
#4
AudiWorld Super User
Thread Starter
Re: Not enough. (edit - link added)
i saw that write up but it also says to disconnect all 4 coils that are not being tested. Does that mean i have to cut the wires off on all 4 coils while testing the other? I don't feel like doing that yet. Or maybe I can buy 5 tester and do 'em all at once.
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