Check your Modulator valve.

Mine did it and it was just a tune up and tfi.

The wire harness just behind the bumper under the truck there is a wire that ALWAYS corrodes, or breaks.

You'll need a balljoint press in it is 2 wheel drive but not sure about 4 wheel drive though.

Funny.... When I bought my 86 f150 4.9 from an old lady that let it sit for a while, the same exact thing happened to me with the horrible stench. What the hell is it?

Sorry about that... Didn't notice you already mentioned it.

There is an inline fuse right behind the battery in the wire harness. Check it. The inline fuse will make the alternator not charge the battery if it blows, but if it is getting corroded it will slowly charge the battery, but not allow enough juice to keep it running on the alternator alone...

Well, I adjusted the IAC about 3/4 of a turn out and it is idleing great, and it's no longer stalling when I put it into gear. It seems that the new carb had to be adjusted to my engine. Thanks to you all for the great help, and god bless!

Fellro that is what the carb is doing, so I guess it is correct. The IAC is something that when I replaced the carb it did not come with a new one. I fealt it moving the throttle when the engine was starting to stall. The truck runs really good once warmed up, it just does not seem to have any...

Just as a side not though.... with the anti stall dashpot.... I closed the choke plate a little bit, I mean really little bit, and the idle straightened out great. I went a little further and it roughened up. But there is no adjustment so I don't know what I could do to change it.

I tried taking the dashpot out of the equation, but it just died. I took off the IAC and adjusted the stop screw 3/4 of a turn, and the idle is up a little. I won't really know if it fixed it until morning when it is cold again, but I will keep you guys informed. The little anti dust grommet was...

Awesome, thanks Amkatt. I probably have to adjust it by bending the rod that links it to the choke. It is bent, which seems unnecessary to me, so I was thinking it might be an adjustment. Otherwise why would the link not be just straight?

B.T.W Doug.... Love that truck in your profile pic!

So if it can be eliminated, then I will unhook the vacuum line and see if that makes any difference. I will let you guys know what happens. Thanks to you both for your replies by the way. I have been on other ford truck forums and there is nobody that post any answers except this one guy who...

My choke pull off is only a year old. I bought a rebuilt carb from national carburetors about a year ago, and it was part of it. But I don't know if mine is adjustable. I know that there is no screw on it. The only possibility would be to bend the arm connected from it to the choke. My choke has...