being pretty inexperienced with a scope myself, it would seem this artifact is sticking out like a soar thumb. Wouldnt this be something apparent to someone that performed my "diagnostic"? that dip between the 3rd/4th ckp spike had me curious from the beginning of being hooked up.

by "coil" you mean "pickup coil" yes?

 

This thing:


I believe the artifact is either from the coil or the signal to the coil.

 

Hmm, my ignition coil is only a few months old echlin brand, replaced while on the hunt in this thread( stock ohmed good but had a crack in the insulation), the new one didnt change anything.

Is this something the scope can check? Don't want to fry it lol

 

Because it appears in every set of reluctor windows, it has to be either all 6 spark plug wires (TTBOMK, impossible), scatter from the high voltage side of the coil, or perhaps contamination from the wire that signals the coil to fire (I'm away from my stuff again for the holiday, but see if the CPS wire is in the same harness as the coil signal supply wire). Since the artifact looks to be only about 7-8 volts, it can't be a direct shot from the secondary coil (which would fry everything).

You can fiddle with this with the Hantek by using the attenuator probe on the secondary coil and it should match up with the artifact in the CPS (don't be standing in a puddle of water while playing with the secondary coil).

 

I'm sure it's fine.

1. Check the distributor cap and rotor for any signs of arcing.
2. Folllow the CPS signal wire all the way back to the ECU to see if it has any contact with the coil supply wire.
3. Change out the CPS.
4. If the CEL remains on, cover with the aforementioned black tape.

 

a bit ignorant here sorry, but this secondary coil, is this one of the wires of the ignition coil harness that i should monitor? and do so while monitoring the cam sensor also?

im trying to dig up wiring diagram for this coil

 

Big fat wire from coil to distributor and the cam sensor.

 

ive got a good brick of time off for the holiday, hopefully I can bury this thread in that time. thank you for all the help, ill post up later with replacement cps.

 

ah figures haha, im happy to check it though. does this require back probing or is this strong enough for the scope from the sheathing. I know its enough to zap you good lol.

 

Or, one of the small wires will be the one from the ECU telling the coil to fire.

 

I would obtain a complete used Distributor, and slide that in

 

everything distributor wise is new now. this happened with mopar distributor assembly and aftermarket.

 

1.

Pcm coil out

2.


Under acceleration

 

Isn't this fun?

 

There is that thing where the major spikes only occur when CPS is sending 5 volt signal. Is that diagnostic of a faulty CPS? IDK, but certainly something to ponder on...