Stalling and Misfiring

[Fane]

Hello all,
My 96 Ford ranger(4x4 4.0 V6) has been having some issues at idle. Even when hot, sometimes when I stop, the RPMs will start bouncing around, and the truck will rock back and forth, and this usually leads to stalling. Now, I've changed the driver's side spark plugs, and I will be changing the passenger soon, but do you have any other ideas as to the cause?

 

[hoosier1104]

Check your fuel filter, condition of your spark plug cables, test your coil packs, check fuel pressure, clean/replace your air filter, check your grounds. There are many different variables you can check.

Is it a manual or automatic?

 

[enjr44]

+++ on fuel pressure.

 

[fumasted]

i'd reccomend a compression check on top of everything listed above. last summer i was experiencing very similar issues and after lots of troubleshooting both heads ended up being cracked causing random rapid misfiring that progressed until it was constant