Help Please

[bunnybuster]

suddenly my 4.0 lost power?
the motor loses power at about 3k rpm?
It acts like no fuel beyond that point? It was running fine and all of a sudden, no power?
I installed magnaflow exhaust..and she ran wonderful for 2 days, and suddenly
the dead spot after 3k rpm?
could it be a sensor problem due to the new exhaust?
It is a 4.0 in a 2008 4x4 ranger.
At this point I dont have a clue what is going on.
I could sure use some help on fiqureing this out.
Thanks in advance
Tom
aka. bunnybuster

 

[superdave1984]

Check your cat. Could be clogged. Shouldn't be given the year, but a clogged cat will cause it to bog at anything over a moderate RPM.

 

[adsm08]

Fuel pump could be bad too.

 

[feellnfroggy]

The MAF is the sensor that normally bails on you at 3k rom range, if you hold it does power kick back in after 3500?

 

[bunnybuster]

Ok
I found out that the engine has a rev limiter at 3000 rpm.
It only bogs in park in revving up. The computer cuts power to the coil at 3000.
going down the road she runs fine. Guess I was concerned about nothing.
I never had a vehicle with a rev limiter.
At any rate...the 4.0 is running stong with the new magnaflow setup.

 

[adsm08]

Yeah, them pesky engine protecting rev limiters...

Glad it's nothing wrong with the truck.

 

[straycat]

Bunnybuster???