86 Ford 250 I got the truck few months ago it had a crack in the origial 4180 carb sitting on the 460 while they wanted to much for new 4180 so I bought 1407 Eelbrock carb for it which is a 750 cfm carb It runs great at idle and does ok acceling slowly but if you get on it it lacks power for second then kicks also the truck don't seem to have no power at all for a 460 i have had 460s before they scream any ideas will help and the engine is reman with warrenty and everhing else was replced t the same time engine was installed minus the carb which i just replaced the guy even put new electric fuel pumps in it with striner and fuel filter receipts im a 10 plus year mechic and im stuck
Could they possibly have gotten the timing(check it with a light) off or distributor turned wrong? don-ohio
SOURCE: fuel pump
Hi I am Vortash you do seem to be having a few problems with this one , and it does sound a little like the fuel pump and ther is an easy way to check you are getting adequate pressure from the pump .. without a pressure meter .. take a small balloon ( you know the type hard to blow small and can cause you to bust a blood vessel trying to inflate them ideal for this ) place it over the end of the fuel pipe and tape it on tight .. remove the lead from the ignition coil so the vehicle will not start .. crank the vehicle and watch the ballon if it starts to inflate then the Pressure is fine . now dont forget this ballon will now be full of gasoline when you remove it so dont break it and have a bowl or. bucket handy .. and when you take it off also remember there is going to be a good deal of pressure in it ?.
Ok so if the ballon inflated the pump is ok if id didnt insist the garage do a fuel pressure test .
I have a cousin who works for Ford here in the UK it is 2.40 am in the morning here now so I will ask him tomorow or later today lol as I have heard of a fault like this before and it was not the fuel system but i want to check with him first .. Regards Vortash
SOURCE: My 1996 Ford F150 4.9l 5spd. rough idle, poor drivability, stall
try replacing the throttle position sensor
SOURCE: i have a 1983 ford f-150 300 straight six ...It
Check to see if there's a vacuum leak at the base gasket. Let it idle and spray a little carburetor cleaner around the base. If the idle goes up, the spray is sealing the leak momentarily. If it's getting too much air, it's the same as not getting enough fuel.
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