V10, testing the COPS
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V10, testing the COPS
Anyone know a way to test for a bad coil? I have an intermittent miss and hate the idea of spending an afternoon swapping them with a good one to test them. I need to do plugs too and hopefully that will solve it, I'd hate to go through the hassle and have it not though. (Knowing my luck the plugs and boots are fine and I have a bad coil.)
My second question on them is, when they fail does the potting compound (white center) turn black? I have one black one and the rest are the normal color.
My second question on them is, when they fail does the potting compound (white center) turn black? I have one black one and the rest are the normal color.
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Before and after, changing the sensors had no effect on it. What the sensors corrected was a complete lack of power and running like it was starving for fuel. I didn't bother to add the lean popping, since I figured that would confuse a few.
Guess I should have gone into more detail, sorry. It was bad enough right before I changed them that I had to keep it floored to maintain 55mph trying to get it home with a loaded trailer behind it. I forget that everyone has a different perspective on power loss.
After the change I locked the cruise on 75 and it didn't flinch, truck and trailer hit the scale at the dump at 16678 lbs.
The bad thing about it is, it doesn't seem to matter what rpm or if there is a load or not.
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From: Frankford, NJ
we had the same thing come into our shop a couple of months ago. the snap-on modis scanner didn't pick up anything. we then changed the o2 sensors and were able to pull a code with one of those cheap little scanners you'll find at advance auto parts. turned out he had 2 bad cops. i think it was a 2002 v10.
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