'Evap canister' HELP

[turnandburn]

Ok so I was out wheelin last weekend and my truck started to run like s*** on and off all day, a fuel issue problem im thinkin. Almost like I had h2o in my fuel, cuttin in and out, no power under load, blowing black smoke when running rough, really rich. I have an aftermarket fuel cell in my truck, its got three line coming off it. Two lines that come off the bottom of the tank and one that tie into the top. The one that comes off the top goes to my Evap canister, and on my evap canister there is a hose that ties into the bottom of the canister and runs down under my truck and is tied to nothing. Now I noticed tonight that I have fuel coming out of that line. Im not a mechanic at all and have know idea what could be going on.

Any thoughts??

[turnandburn]

http://i704.photobucket.com/albums/ww44/turn2andburn2/Picture011-1.jpg
"the charcoal cannister, the "P" port comes from the throttle body "P" fitting, the black hose goes back to the gas tank (vents gasoline fumes to the cannister). The third line that exits the bottom of the cannister is the fresh air vent line and just hangs down towards the frame. It provides the fresh air that flushes out the gasoline fumes trapped inside the charcoal when the engine vacuum applies vacuum to the purge port of the cannister."

Found out what the evap canister does. Now why the F do i got fuel coming out the fresh air tube?? Flooding?? Think maybe I got a plugged up fuel filter?

Paging Antonio!

[turnandburn]

What I have found and done so far.
Drain fuel tank: found a little water.
Changed first in-line fuel filter: had some water in it.
Disconnected vacume line from evap can to intake and plugged: Lots of liquid gas in that line, which should be non.
Fixed a vacume leak:
Still not running good. Still starving for fuel. Just bought the factory fuel filter that hangs off the side of engine. Yet to install that. Glad I have a body lift, will make it a lot nicer to put in.
If that don't work im going to be checking my fuel pump. Which reminds me, shouldn't my fuel pump come on with turning the key on? It comes on only after the engine is running for a second. Its an after market pump and is external.

Come guys any input???

Thanks

[874runnersr5]

Hey buddy I'm just at work right now, I'll take a better look when I get
home and try to figure it out

[turnandburn]

put the fuel filter in and problem still there.

Runs good till temp comes up to normal, then as it gains rpm the engine bogs down while under load, I can mat the throttle and its like zero fuel is getting to the engine, as I let off on the pedal the engine comes to life with a jolt, ease the throttle down and the same thing, bogs down until I back off the throttle. Might be leaning towards the TPS but think I may need a mechanic to check that.

The weird thing is that back a few weeks after I bought it the same thing happened while driving down the high way, I stopped and it died. Took about 15 mins before it would fire up and she ran fine for a few months. It happened again, same thing it died, took a bit to fire up and good for another month or so. This time it didnt smarten up like it did in the past. This kind of crap I wish it was carbed, I little more non mechanic friendly.

[874runnersr5]

alright hmmm... test out the tps and afm first..
http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

http://www.4crawler.com/4x4/CheapTricks/AFM/index.shtml

also getting any check engine lights?

[turnandburn]

Ok so I havent had much time, but i did try an afm from a 91, 89, and 88 all three made the engine light come on and the truck died within 30 seconds, runs better with what i got. Also found out that the truck runs perfect until the h20 temp comes up to normal, as the temp rises the problem gets worse. Im calling a mechanic tomorrow that I know to see if he can come out and check my tps and afm out.

[874runnersr5]

mm... could be alot of things..:mad:

[turnandburn]

What makes me think it has something to do with the AFM is that one time when it was idling real bad I manually opened the valve inside the AFM and it cleared right up and idled great from then on. Weird. But why only run like crap once up to temp?

[874runnersr5]

coolant temp sensor?

[Winch]

What makes me think it has something to do with the AFM is that one time when it was idling real bad I manually opened the valve inside the AFM and it cleared right up and idled great from then on. Weird. But why only run like crap once up to temp?

Well, as you know the AFM basically "measure" the density of air. Cold air has a higher density than warm air, and the purpose of the AFM is to "measure" this to adjust for the fuel mix. Where is the air intake on your truck? Is it as shown in the pic above with the K&M filter? If that is where it is located, then it's possible that engine heat causes the intake air's density to decrease, requiring less fuel to be supplied. If this is the case, longterm you would need to figure out how to prevent hot air intake, short term it could provide for a tip as to why the symptoms are only once the truck warms up: something causing an inability to lean the fuel mixture (flooding it) as the intake air heats up???? Just a guess, could be many things, though.

[turnandburn]

coolant temp sensor?

Spent a few hours online last night doing some research and found lots of people over the years with this problem, but reading though old threads and such, found 99% of them had no resolve for their problem. The one I found had a bad coolent temp sensor, the one that controls your cold start injector. So tonight after work im going to unplug that sensor and see if the problem goes away.

Reading codes? How to? Its an 85? Anyone with links?

[turnandburn]

Well, as you know the AFM basically "measure" the density of air. Cold air has a higher density than warm air, and the purpose of the AFM is to "measure" this to adjust for the fuel mix. Where is the air intake on your truck? Is it as shown in the pic above with the K&M filter? If that is where it is located, then it's possible that engine heat causes the intake air's density to decrease, requiring less fuel to be supplied. If this is the case, longterm you would need to figure out how to prevent hot air intake, short term it could provide for a tip as to why the symptoms are only once the truck warms up: something causing an inability to lean the fuel mixture (flooding it) as the intake air heats up???? Just a guess, could be many things, though.

Thanks, this will be my next item to check if my coolent temp sensor is not the problem.

[turnandburn]

No go on the coolant temp sensor, I unplugged it and no change.