i am a new guy on here i have a problem that i cant figure out maybe one of you guys can help ok heres the deal i have had this truck over a year. its an 1981 f100, 2wd, 4 on the floor. ok well the truck is a beast. its old beat up the normal stuff but the motor is somthing differnt. its only a 351w with a 4 bbl 400 cc nothing much well the combo of the tranny and motor makes it unstopable. well it sat for two weeks due to a tire problem. when i parked it for the two weeks it was running prefec well when i started it back up it ran ok but it bogged down about 2,500 to 3,000 rpms so i figured ok maybe the gas was bad changed out the gas and put gas treatment in it.did nothing ok maybe spark plugs, wires, and distrubtor cap well all good spark plugs where alittle spaced out but nothing i couldnt fix well did that didnt work. well so next i check the timeing and adjusted it alittle ideals better but still doing the same thing. so i sparyed carb. cleaner down the carb. and cleaned it all out seeing since it only does it when you floor it or about 2.500 to 3,0000 rpms maybe its the back bbls causing it to do it well that didnt fix it i ran out of ideals what it could be there is one more thing i am going to and that is to hook up all the vaccum lines but id otn knwo where any of them go so if any of you guys can get me a diagram of the vaccum lines foran 83 351w i would really be happy and one more thing i forgot to post on here it isnt starting on its own i have to prime it and then i start up rite away but still bogs down so if you guys know what is causeing it please help me thank you

 

what year is the engine? Try posting in the 351W forum or the forum to whatever year the engine is. You don't get as much traffic here. Good luck! I have no clue what the prob is, but I'm a novice.

Ryan

 

We aren't supposed to get too technical here in the local forums... but you should get plenty of help from the engine forums, or the year forums. Welcome all the same though. Thius is just us locals, if you go to those other forums, you'll have anyone in the world that is looking in there able to answer better. Most that come in here are locals.

 

if it's got a 4brrl holley the seal may have dried up.. may need a refreshing kit....

 

yes it is a holly 4bll and now its not getting any gas at all could the pump in the carb be bad?

 

Maybe the accelerator pump, but I thought they leaked when they go out, or a bad fuel pump based on your last post. "now its not getting any gas at all"
Jeff

 

i replaced the fuel pump a couple days ago