Seafoam is a good idea too. I dump a bottle of it in my tank a couple of times a year.
It seems to be the modern equivalent of MMO.
If your modern Mopar is acting a little flakey at idle or slow on the accelerator or rough idle and you don't have an obvious mechanical problem (like weak fuel pressure, a vacuum leak, etc.) the suggestion I often hear on other forums is like this:
- Feed a can of Seafoam into a vacuum line (power brake booster connection or intake plenum) and "burn the carbon out".
The usual plan is to clean the throttle body first, as has been recommended in this thread.
Then feed the Seafoam into the intake manifold (you pour some into the vacuum line, until the engine almost dies, but not quite, then back off...repeat until the bottle is empty).
Let it set engine off for 10 minutes, then start it up and run it at high idle until all the smoke stops coming out. The more smoke you see coming out, the more you needed to do it!
Almost immediately, you should do a FULL oil and filter change, to get rid of the TB cleaner and excess Seafoam.
Supposedly this little procedure will burns off the excess carbon from the valves or something, and some folks say it can "clean out" a clogged cat too.
Don't know if it really works like, that, but some people swear by it. And it costs less than $10 for the Seafoam, plus the oil and filter, which is regular maintenance anyway.
The folks on the Chrysler 300M forum claim I should do it every 50k miles. Haven't done it myself, but my car is running pretty smoothly right now.
Anyway, regardless, Seafoam does seem free up stuck injectors for a lot of folks, so I dump it in the tank just as "preventive maintenance" twice a year.
Oh, I usually buy cheap gas too. So, if I bought premium with additives, might not even the Seafoam. But to me, it's "cheap insurance" for the fuel injectors I think.
