2005 ram 1500 4x4 5.7L hemi 100 000miles

I'm detecting a misfire that is occuring under light load. Happens when most often when the cruise control is engaged and the vehicle climbs a slight hill or you press the accell button. It does occur with the cruise off but is harder to duplicate.

No dtc is setting. If you accellerate harder the miss stops. it also stops if you disengage the cruise.

I believe it to be primary or secondary ignition related as the tack needle jiggles as the misfire is occuring.

I plan to put the scan tool on it tomorrow and watch the misfire data to see if i can isolate it to one cylinder.

Any common faults that could cause this?

Thanks

 

For future reference:
https://dodgeforum.com/forum/dodge-r...s-section.html

 

Thanks. I did a thread search before I posted. I went through approx. 30 posts for misfire conditions. All were for constant misfires not intermittent like what I was experiencing.

I put a full function genisys scan tool on it. Misfire monitoring was not an available parameter id, even in mode 6.

Does anyone know if dodge products only display misfire data with a factory scan tool?

 

actually no,the processor will set a dtc code indicating which cylinder misfired. You might try changing out the plug wires if that hasn't been done yet, and possibly new plugs.
Follow the directions in the FSM if you have one as the wiring layout is important

 

no dtc are set

If I could find live misfire data on the scan tool this problem would be solved. I can do it on gm and fords why not dodge.

I will inspect the plugs, wires.

Today I did find some mode 6 data failures for the egr system which I found strange as all the I/M monitors have run and passed.

if anyone knows how to view live misfire data on dodges; let me know