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I bought a 85 F150 with the amazing I6 4.9Ltr and a T-19 Transmission. Was Auto but changed it and rebuilt engine (with help of course). 67,523.2 Miles after rebuild. I have recently taken the A\C out of the pickup. When i did so I started noticing a vacuum leak in the carburetor, i have taken the carb off twice now to tighten it. i have replaced the gasket, but it still loosens and leaks after about 100 miles. what could be the problem.
I bought a 85 F150 with the amazing I6 4.9Ltr and a T-19 Transmission. Was Auto but changed it and rebuilt engine (with help of course). 67,523.2 Miles after rebuild. I have recently taken the A\C out of the pickup. When i did so I started noticing a vacuum leak in the carburetor, i have taken the carb off twice now to tighten it. i have replaced the gasket, but it still loosens and leaks after about 100 miles. what could be the problem.
You really should've started your own thread, but you're new, so it's okay.
Which gasket have you replaced? The carb to EGR gasket?
If you had A/C, and you removed the A/C, I don't see how doing that would require you to mess with pulling the carburetor off? Did you get vacuum caps and plug your un-used ports?
Sorry. i have replaced both gaskets and plugged holes. i couldn't hrar the leak before due to nnoise from ac at all times. Last night a friend and myself replaced tge screws holding the carb together. And have driven almost 300m wnd no more leak. thank you for the help
Ok so I have a 1986 f150 and im stumped im thinking about putting dual exhaust headers on but there is a line that goes from my exhust headers to my EGR valve but in the picture of the dual exhaust headers don't have that
Ok so I have a 1986 f150 and im stumped im thinking about putting dual exhaust headers on but there is a line that goes from my exhust headers to my EGR valve but in the picture of the dual exhaust headers don't have that
The thread you have responded is 3+ years old. You might get more response by starting your own new thread.
Before doing anything, determine if you have to pass emissions testing where you live. Not only does the 1986 have EGR, but there is an O2 sensor in that exhaust manifold which communicates with the computer.
I haven't worked on any sixes before, but some of the pieces are common to every engine.
#1 is the EGR valve. It puts exhaust into the engine for emissions reasons. Looks like it's disconnected.
#9 is the fuel filter.
#7 looks like a throttle position sensor.
#3 is the choke housing.
#6 is the hot air tube that warms the choke housing.
#4 looks like some sort of idle control motor.
You know what all this means? You have a computer controlled engine, and all the computer stuff has been disconnected. If you want to it run correctly, you are going to need to get a distributor and a carb for a older engine that did not have computer control. Right now you have no timing control at all, no wonder it gets lousy mileage and has no power.
can anyone one tell me what is the disconnected port one inch to the right of 9 in this photo?
can anyone one tell me what is the disconnected port one inch to the right of 9 in this photo?
Carb bowl vent. The square front part of the carb is a bowl with gas in it, just like the bowl on a toilet in your house that has water stored in it. Fumes come off this fuel stored in there, and in the old days they just let it pass out into the air under the hood and the aircleaner, but later on with emissions rules, they capture the fumes with a rubber hose hooked to that port. The rubber hose goes down, usually with some controls of some sort, to a black box mounted down low on the front frame. That is the charcoal canister and it stores the fumes till the engine is run later on. It has a control system that lets the engine suck these old fumes out of the canister and into the engine where they are burned. This is part of what Ford calls the EVAP system.
Thank you for the quick reply! Does anyone happen to have a diagram or part numbers for this piece? The reason I'm asking is when changing my pcv I noticed that mine had become disconnected and the black rubber/copper? Fitting doesn't seem to want to stay in the hole
The hose goes over the copper fitting and the copper fitting goes into a hole in the carburetor but doesn't seem very secure I can push or pull it out with very little effort
I haven't worked on any sixes before, but some of the pieces are common to every engine.
#1 is the EGR valve. It puts exhaust into the engine for emissions reasons. Looks like it's disconnected.
#9 is the fuel filter.
#7 looks like a throttle position sensor.
#3 is the choke housing.
#6 is the hot air tube that warms the choke housing.
#4 looks like some sort of idle control motor.
You know what all this means? You have a computer controlled engine, and all the computer stuff has been disconnected. If you want to it run correctly, you are going to need to get a distributor and a carb for a older engine that did not have computer control. Right now you have no timing control at all, no wonder it gets lousy mileage and has no power.
do you know what 2 is? Mine has been broken off and sealed shut.
06-23-2013, 05:12 PM
Learning this motor
