Need some help here please.I have a 96 f150,4.9 six cyl,150000 km,5 speed.The truck seems to work fine in town,but when i go out on the highway,and try to accelerate,there is no power.I can put the peddle to the floor ,but it acts like its not getting enough fuel.Had a rusted gas tank,changed that,thought it might help ,but it didnt .New filter also.Also it starts hard sometimes,then shakes and goes on,but finally picks up the fuel and is ok.

Any ideas?

 

i know my overdrive gear on my truck (93 f150 5.0) i have no acceleration when i get on teh high way i rev it up in 4th until about 4500 rpm until i get going at a decent speed. so i have nothing in overdrive/5 gear

 

yep i know what you mean,i get no power in od either,but it seems like in anygear if it gets to a certain rpm(i dont have a tack)it cuts out,almost like the old goveners that engines used to have

 

hmmm weird don't nkow wat to say. im looking to buy a superchip for my truck to get more power in OD i kinow i need more power for mudding in 4 high. hopefully tht will do it. mayb not enough gas is getting though? sendiing unit or somethin? . ok heres a suggestion go to speedway or some where liek that and buy a can of seafoam its in a white adn red can, dump it all in your gas tank 1. you'll get better MPG 2. it will clean the sending unit and injectors n such. might help

 

already put some injector cleaner in the tank,didnt seem to help much yet anyway

 

ionno man this seafoma is amazing stuff, better then any engine treatment i've ever used. but i don'tknow what to tell you then

 

thanks for your help,im not sure if seafoam is available here in canada

 

ohh cananda. probably not i know on other forums i saw some canadians scrambling to find seafoam

 

I'm thinking it's TC

 

sorry,but whats a TC?

 

I think you could either have a bunch of crap getting pulled up against the fuel pump intake or fuel filter by the sustained speeds on the hiway, or a partially plugged cat.
Had something similar on a car many years ago. The fuel filter was mounted vertically and was clear plastic. Reving the engine, I could see the debris pull up against the filter and restrict the fuel flow. When it dropped back to idle, the junk fell off the filter and everything was fine.
A vacumn gauge can help determine if the cat is restricting exhaust. Of course, pulling the codes is almost always the first step in problem solving.

 

Pull your codes, you may have another problem.

 

The truck also starts hard sometimes,shakes and misses til it get fuel,i`m thinking weak fuel pump.Or maybe a dirty filter on the pump its self.It was pretty dirty when i had the pump out,and cleaned it the best i could.

 

think i might have found the problem,unpluged the tps and took it for a spin,worked great,lots of power other than over reving when shifting gears

 

Have your Catalytic Converter checked out I bet you will find its pluged up and if you replace it your power will be back Just replaced mine on my 88 150 with the 6 in it was running rough and lack in power on open road and now runs great. But be warn thay arnt cheap