what's up guys, i got a 74 mav straight 6. The car runs good but when it warms up it starts to run rough. i have noticed that the carb choke is at full open all the time, when cold and when hot. i have put carb cleaner and choke clean but still the same thing. The car feels like it wants to turn off when i stop at a light. i called a parts store in my area, (winchester auto) they can get me a rebuilt one for $149 but am not sure if there is somewhere to get it cheaper or if there is a better one then. auto krafters does not care it for the straight 6. if you guys have had this issue before or if i can give you more info that would help you out to figure out what's going on, please let me know. also i talked to someone out here to get it rebuilt but it will cost like 2 something, im better off just buying it from the store. anyways any help would be much appreciated. thanks
It hard to trouble shoot long distance. It could be bad gaskets under the carburetor or a loose nut holding the carburetor to the intake. A vacuum hose leak will cause the same symptoms. So will a restricted exhaust.
Check what rthomas771 said first. By saying the choke is fully open all the time, do you mean the choke butterfly is closed? When the engine is cold, with the choke operating, the engine WILL run fine. But when the engine is warmed up, with the choke still operating in the closed position, the engine WILL run terribly. From the way you described your engines running characteristics, it sounds like the choke is operating in the closed or partially closed position when the engine is in its warm operating temperature. Make sure your choke butterfly blade is completely open when the engine is at running temperature. I have a 1970 f-100 with a two barrel carb., and it was running like you say that your car is running,but my choke butterfly was open. Upon ferther investigation, I found that my choke linkage itself, was hanging up, periodically and causing my truck to run terribly. I just removed my choke mechanism from the side of the carb., since I don't need it much anyway. My truck runs much better.
thanks for the reply, i have checked the lines and they are fine. as for the gasket that i do not know. as for the choke it is never closed it is always in the open position, when cold or when hot. i think it should close a little when its warmed up. but its always in full open. i checked the linkage and they seem to be fine, moved them and it moves the butterfly. could it be the choke thermostat or that vacuum thing that makes the butterfly move. can the fuel filter be causing this? wow there is just so much to check on a carb. some mechanic told me that he would check it but for 50 bucks and thats just to look at it. what do u guys think good price? i would like to do what i can do before giving the guy 50 bucks then he tells me that i need the carb sent to be rebuilt. anyone:
In order for the choke to close when the engine is cold you have to operate the throttle. It is supposed to be open when warm. Push the throttle half way and then check to see if the choke is closed. If the choke stays open all the time and the engine runs well when cold then the carb is too rich to run properly when warm.
Your dash pot that has a vaccumm line running from the carb itself should hold that butterfly in the open position.
this is a simple carb to rebuild your self.The instructions come in the kit. You only have to buy the float seperately. It will cost maybe 35.00 to 45.00 to do this your self.
Personally I'd say buy the reman. I was going to try to rebuild mine and some of the screws started pulling threads out. I bought a reman. and it runs perfect. Much easier if you don't have alot of mechanical ability and well worth the money if you get a reman. from a quality supplier.
I have been every where and i cant find a shop manual for my 74 maverick 200 i6. this sucks, i know i have to by one, but i was hoping that someone maybe would post something on these engine. **** i did my part by posting a manual for the carter carb for these cars that i found. sorry anyways does anyone know where i can find info on these engines, manual a break down of these engines and so on? Last week i adjusted this thing and im going to call it a thing cause i have no idea what it is and can find no info on this engine. anyways this thing is on the right side of the engine or drivers side and is in the block, it has a wire that screws on to it. for some reason it was loose and when i tightened it, it made good contact with this thing. anyways after doing so i notice that the car got better throttle response. does anyone know what it is. i also notice that it is leaking oil from there. i am going to have to take a picture of it and post it. its where the fuel pump is and is back by the fire wall. any ideas i know im going to have to take a picture of it so you all can see it but any help would help. also what other cars have the same engine??? is it a mustang II ???
where did you get yours from do you have a web site or something i can work with. also how much did it cost you.
I have an exhaust leak, and the car stops when im at lights. Could fixing the exhaust help that? I'm a newbie. Straight 6 74 maverick 250
