I can't rev over 4000 RMP?

Question

So here's a new one for me...

I've got a 2004 Civic [ex model].  I was out driving just now and the car wouldn't allow me to rev over 4000 RMP.  It was limiting it the same way it does to prevent "redlining" but obviosly 4K on a civic is nowhere near tops.

I turned off the car and then restarted it and the problem was gone!


I'm thinking it was the computer doing something strange...  Anybody know why this would happen and is it anything to be of concern?

Thanx,
Phil

? · Accepted Answer

Could be you knock sensor. If it goes bad or senses that there is a knock in your motor it will slow the motor from reaching higher rpms to prevent slinging a rod, or making further damage. Take it to your local auto zone and have a diagnostics test ran on it (they are free) to see if that's what it is.
Hope that helped some.

XsVnSrNgX · Answer

Rather than the limp mode and the dangerous situation detection. If you have a V-tech engine, the ECU may have spit an error out on start up. Or one of the sensors are going bad. Making the V-tech not engage. 

As a worry. I wouldn't much. To be safe, Reset the computer completely. Pretty sure you do that by un hooking the battery for 10-15 mins. Atleast on older Hondas.

Jonathan W · Answer

It's possible that the computer sensed a danger situation for the engine, and therefore limited your use of it's power.  This happens in most new vehicles.  For instance, high moisture content, bad gasoline, indicated overheating, and many other issues can cause the engine to operate in a "limp" mode and not give you all the power.  If this is a one time occurrence, I wouldn't be concerned at all.  If not, then do some more investigating.  Were you at a high rate of speed?  What were the full conditions... these are important things to note to determine the actuality of an issue.

I can't rev over 4000 RMP?

Trending Questions