A couple of issues on the internet about the 3.7 engine.
3.7 Cyclone Cam Torque Actuated Phasers Problems
Cam torque actuated phasers, primarily affect the later Ford 3.7 Ti-VCT engines. Dual variable cam timing (Ti-VCT) is somewhat complex technology involving many moving parts. The idea is to adjust cam/valve timing to allow for a better power band and fuel economy. It’s great tech that many modern engines use.
However, problems can and do occur with these systems. The Ford 3.7L Cyclone cam torque actuated phasers (cam phasers for short) are one of those issues that pops up. Cam phasers rotate each camshaft relative to the timing. When the 3.7 Duratec cam torque actuated phasers fail they can cause a handful of symptoms and other issues if not fixed in a timely manner. It’s also a pretty expensive fix.
Look for the following symptoms that may indicate an issue with the 3.7 Cyclone cam torque actuated phasers:
Check engine light
Rattling sound from engine
Power loss
Rough running
When the cam phasers fail you’ll usually get a check engine light and hear a rattling sound from the Ford 3.7 engine. It can also cause improper ignition timing, which can lead to a loss of power and rough running.
Ford 3.7 Cyclone Ignition Coil Issues
The 3.7 V6 is a solid engine, overall. We’re mostly talking about ignition coils here since there aren’t many other major common problems. Ignition coils are really a standard wear and tear part that usually require replacement at some point during an engines life. However, the 3.7 Duratec ignition coils sometimes fail earlier than normal.
Look for these problems to pop up somewhere in the 70,000 to 100,000 mile ballpark. It’s really not a huge deal all things considered. Ignition coil replacement is usually required by 150,000 miles, anyways. It’s also not a serious issue by any means, though ignition coil problems can cause some drivability issues.
3.7L V6 Duratec Ignition Coil Symptoms
Symptoms of ignition coil faults on the Ford 3.7L V6 include:
Misfires
Rough running
Check engine light
Stuttering
Misfires are the number one symptom of spark plug or ignition coil problems. Though, misfires can have many other causes. When the 3.7 Cyclone ignition coils go bad it will prevent the air/fuel mixture from properly igniting. In turn, you may notice the Ford 3.7 engine is running rough or stuttering. Misfires can sometimes trigger a check engine light, too.
