So I just got done doing the seafoam treatment to my engine and now I have a question about the rev limiter. After I let the car sit for about 10 minutes I started it back up and let the engine clean itself out. Not as much smoke as others have said after using the seafoam but I just took that as a sign that there was not too much carbon buildup in the engine. I only have a little over 33000 miles on the car. Anyway, while I was letting the smoke clear I was revving the engine and it would not let me go past 5000 rpm while I was in park. When I took it out for a drive and went WOT it went all the way to 6500 rpm no problem. Is it normal to not be able to rev the engine over 5000 rpm in park or neutral or do I have a problem? I had not noticed this before I did the seafoam treatment so that is why I am asking now. Mabye someone could check and see if their car does the same thing. I have an 03 AV6 Coupe. Any help or suggestions would be appreciated.
I posted this question in V6P also just in case anyone notices.
TIA

 

For anyone interested, I found out that the ECU will not let you rev your engine past 5000 rpm when in neutral or park.

 

Guess that's on newer models. My 95 will redline in N. Do you feel or see any type of difference after cleaning it. It didnt have many miles on it, you wouldn't see as much difference as doing it on a car with 160+K milkes on it. Did the smoke that came out smell nasty, like carbon burning, or have more of an oil burning smell? I think the seafoam itself will also cause smoke, but you can tell when it's carbon burning.

 

my 02 accord has a rev limiter when its parked or in neutral.

 

Honestly, I didnt notice much difference after I did the treatment. The seafoam definately got rid of some carbon bulid up in the engine, I could smell it in the smoke. There was not as much smoke as I thought there would be but I am happy about that.
I also used seafoam on my stepsons 93 Bronco with 155000 miles on it. It really made a difference in his car. LOTS of smoke and nasty carbon smell. Ran smoother also.
I would recommend seafoam for higher milage engines for sure. With all the detergents in todays gas it would probably be ok to wait for much higher milage before using seafoam. Seafoam recommends using the product every 2-5000 miles but that seems a bit excessive to me. If you just want the peace of mind knowing that your engine is super clean than you should definately use it.

 

Damn, I woulda liked seeing the Bronco smoking, must have been crazy.

 

It was. I am suprised no one called the fire department. It was everywhere in front of my house. I am really glad I did it though. Very good results.

 

They do that so you cant do burnouts by revving the motor and dropping it into gear.