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Hey guys happy fall. I have some questions I have been getting frustrated with. I thought that when a car comes in with a misfire ,if the coils are easy to get to that running a amp ramp test would avoid me some embaressment if I found a bad coil before the tune up if needed. Well on a transveres v6 I ramped them from the fuse box by left bank/right mank. they all looked the same -but found 1 bad coil in the end thanks to the code .The a 1999 passant I couldn't get a pattern - found the ic modual was bad. but more recent a 2016 compass 2.4 -all the coils looked the same after the tune up still has a mis and swaping the coils showed the mis followed the coil. so whats the deal swapping the coil is better that the scope ? Is there a better way to labescope coils ? Iam I doing something wrong ? is my scope lying to me ?
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Snap ON does have an assortment of coil on plug (COP) inductive pickup adapters that pickup the secondary waveform. It's an alternative but I rarely use them. -
yes I rerely use the cop adaptors
The adaptors are like the cone of silence on Get Smart tv show they rarely work. I really want to get to the nuts and bolts of how I get a what I think is a good amp ramp pattern that looks like the rest and swap coils and clearly the coil was the issue . What part of the pattern do I need to be schooled on , And is it possible that the amp ramp can in fact miss a bad coil ?Comment
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Yes, I always use the COP for ignition testing since it is a great non intrusive inductive test. Wow 1999, I believe in your case this will use spark plug wires. In this case you can use the secondary plug wire adapter. Some old timers refer to this as the PEZ adapter to scope the secondary ignition. If the V6 probably a waste spark ignition system so you may need to play with the scope settings a little such as invert etc.. to get a good pattern. hope that helps. Take care DynodaveComment
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