Why would my truck go to reduced power mode? It was driving fine all day.

 

it wont go over 2000rpm.

 

a number of reasons. but we're gonna need ALOT more info. year, engine year/size/ tranny, any modifications to engine, type of vehicle.

 

yep..if u actualy post info somebody might post back...and to tell you the truth if i see threads like this with the 4-5 words i skip over it and go to another 1 INTIL they either give more info... not to be mean...but its kind of hard to say anything to help you when u say "why does it go into reduced power mode and it only goes to 2000rpm" for people to help you we need a year..the model of your car/truck.. engine size....

 

Sorry for the short question and details. My truck is a 2003 chevy 1500hd crew cab 4x4 with a 6.0 and a automatic 4l80e. No internal mods to the engine. I have electric fans, cold air kit, throttle body spacer, 2 in 2 out flowmaster dumped before the rearend, 7.5mm plug wire's, performance plugs, hypertec programmer, after market rims with a 2" leveling kit, 305 70 r16 at's. My truck ran fine today. Yesterday was the first time it has ever went to a reduced power mode and i didnt and still dont know why it did that. If any body has any advice it would be greatly appreciated!

 

Oh yeah my truck has 145000 miles on it. I have never changed out the o2 sensor's. I do change the fuel filter about ever 50,000 miles or so. I change my oil and try to maintain my truck my self. I also have put a powermaster 205amp alternator on it.

 

there you go..and no i wasnt trying to be mean or anything in my post.. now back to your question if it ever comes on again..try to drive to a autozone or advance.. and get them to check it..and dont forget do NOT turn the engine off... thats just my little 2 cents.. oh and remember to right down a code if they give it to you..

 

My truck did that when it burned up a spark plug wire, went straight to the dealership, I only had 6,000miles or so at the time, also if the MAF sensor is disconnected it'll do it, along with many other things that could cause it.