2003 Dodge Dakota 3.9 PO351, backfire low power

2003 Dodge Dakota 3.9 PO351, backfire low power

Good fuel pressure. Distributor Sync set to 0
Attached is the cam and Crank current waveform.
Crankshaft position sensor was replaced due to customer damage of old crank sensor when customer installed their own clutch

Problem started after clutch installation

Po351 keeps coming back on when you got wide open throttle every single time

Also replaced the ignition coil attached is screen shot of ign primary waveform measured at control,side of the ign coil

And the Cam and Crank signal waveform. Yellow channel is Crk green Channel is Cam

This vehicle has absolutely no power when you throttle

Ign wires are in right location per firing order.

Back pressure test doesn’t show clogged exhaust either. O2 sensors respond to rich and lean induced conditions too.

Any input would be appreciated

Pretty sure that is supposed to be a skinny one.

This is a 2001 3.9 l



This is Alldata for your year:



I think your customer may have damaged the tone ring.

That should not be a wide one.

Customer installed wrong flywheel from 4 years prior. And the tone wheel was not pressed on in the right location either it was completely backwards

This one is fixed. We machine old one and installed back on to truck and you can see how backwards that tone wrong was on this thing.

But this one is a fix and yes tone wheel was also damaged

You can see the new shiny one in reference to the old factory one how the ring was way wrong completely backwards

Nice work Sir!

Post us a good known good CMP/CKP!!!