← Misfire / rough running on all engines
Symptoms · ProMaster 3.6 (gas)
ProMaster 3.6 (gas): misfire, rough idle, hesitation or surging
2 documented failures on this engine list this among their signs. They are ordered from the most widespread down. Each one shows the signs in its record's own words, how to tell it from the others, the usual fix and any recall or bulletin.
Not sure which engine you have, or want the recalls for your exact truck? Check your VIN: it names the engine and lists the campaigns for that model year. Whether a recall is still open on your VIN: nhtsa.gov/recalls.
aggregated
How widespread: Common
6 NHTSA owner complaints match it, out of 459 checked
How it shows up
- misfires or power loss as a follower collapses
Its other signs
- ticking/tapping from the top end that persists warm
- metallic debris at oil services in advanced cases (cam damage)
How to tell it apart
- locate the tick per cylinder (hose/stethoscope); rule out exhaust leaks first
- compression and leak-down before pulling the valve cover
- inspect rockers and lash adjusters at the suspect cylinder; check the cam lobe
Usual fix
rocker arm / lash adjuster replacement; camshaft replacement where a lobe is damaged
Root cause, parts and sources →
aggregated
How widespread: Occasional
3 NHTSA owner complaints match it, out of 459 checked
How it shows up
- misfire DTCs on specific cylinders
- rough running that follows a coil swap
- hesitation under load on worn plugs
How to tell it apart
- read misfire counters per cylinder; swap the coil to confirm
- inspect plugs for wear/gap; replace at interval
- check for oil fouling (ties back to the housing leak)
Usual fix
spark plugs and/or coil replacement per diagnosis
Root cause, parts and sources →
Other symptoms on the ProMaster 3.6 (gas)
Hard start, long crank or no-startStalls or dies while drivingLoss of power, limp mode or derateLosing coolant
Everything on the ProMaster 3.6 (gas)Its recalls and bulletins