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Matthew I know its been a while but today I finally have an update. I put an obd scan on it and it returned a bad tps. So I ordered one and put it in and the engine runs like new again only the one problem still exist. I cannot get the choke to close on its own when I start it in the morning. Something is making it stick open until I manually push it closed and then it works until the next morning. When I close it manually there is no tension on it, what I mean is you can tell there is no spring tension against it until I close it then the tension is there. Do you have any idea why that would happen?
Sounds like it's gunked up, try spraying it with carb cleaner, if you pull the choke off make sure you very clearly mark it so that it goes back together correctly
Really? I had it pulled off. See when I got the new carb, it came with the new choke thermostat broken. So I had to put my old one on it, and I had no idea where they had it set at the factory. Right now, I have my obd1 throwing a code 41 running lean for more than 15 seconds. I have no idea why. I changed the T.P.S. and the coolant temp sens. and it did not help. Truck wants to stall when I first put it into drive, and then after that runs good. Still stalls when I start it after sitting overnight, or several hours. I am so confused. I have no idea what to do next with this. I sprayed carb cleaner around it, and in several spots it changed the idle, but then I tried spraying the same spots closer and nothing. I am not sure if the spray was just going up into the throat or what.
Got a video? It still sounds like a vacuum leak to me. Dont for get that there might be vacuum going to the transmission for the transmission modulator. Not sure if Fords have them or not.
Did you mess with the idle screw, then change the TPS then not touch Idle screw?
Rule of thumb is all the way in till it lightly bottoms out, then out 1 and 1/2 turns. This might be the issue for running lean.
Remember that the carb is ALWAYS using the idle circuit. ALWAYS!!!
I did mess with the screw before and after. I still have it set around 5 turns out or else it rough idles really bad. I have to keep my foot on the gas after cold starts because it is so rough it seems like the engine is going to fall off the mounts. Then, I have noticed a slight hesitation when I am accelerating. Could the o2 sensor cause any or all of this?
I do have a vacuum gauge. When I adjusted the idle mixture, I hooked it up and got the highest vacuum at five turns out. It was around 24 or so. It was in the green anyway. It's raining here all day too. I'm in western mass. Now it looks like the rain will be here for another couple of days unfortunately. Although I'm not against working on it in the rain if I could resolve it that's for sure.
Just wanted to update. I found the problem with the slight hesitation. A while ago I took the vacuum lines off the firewall that go to the transmission, and put a vacuum line straight to the vacuum tree. The hose I used must have been the wrong size. I put everything back to the factory setting, and now the hesitation is gone. I still have the stallin gissue though when first put into gear. Will post if, and when I fix that.
05-23-2015, 08:36 PM
