i just got the car back from the shop with its brand new exhaust on it and the engine is still idling kinda low so i popped the hood to check it out i expected to have to just adjust the carb a little bit when i propped up the hood i saw a little smoke coming from under the air filter. so i took the air filter off and smoke started coming out of the carburetor and when i went to peek inside to see what the problem was i heard a small hissing sound like there was a leak or something. so i looked around and saw that radiator fluid was around the rim of the radiator and sure enough the sound was coming from where the cap is. i haven't unscrewed the cap yet because it is still hot. what do you think the problem is and will i need a new radiator or just a new cap?
Smoke out of the carb? was it black? when i lost the water pump on my old pickup it did something similar, caused an overheat scenario, and had the intake hot enough to pretty much evaporate the gas right off the bat, made it run like crap and too lean... possibly? Coudl also potentially explain the coolant around the cap, but what gets me, is why is ti pooling around the cap? my mav has the tube that shoots out out the side onto the ground when pressure raises too much... unless your hose is missing or something?
mine did that when I blew a head gasket. outer seal on the cap leaked due to combustion pressure in the cooling system and oil contamination of the cap rubber. of course it was old too...
Correcting, if the gas is evaporating it wont' be black, but if you get black smoke, could be bent valves? but you'd probably hear that... :X Sometimes i have those i'm-a-tard days... lol But yeah, i can def see where head gaskets could do that... but then again... wouldn't it puke from the tube instead of the cap?
Don't know about the smoke from the carb but by now I'm sure you've taken a look at the radiator cap. Hopefully the rubber or the spring on it is just worn out and the cap needs replaced. I believe that a crack or leak in the washer of the seal plunger could let it leak through the neck of the radiator and bypass the puke tube.
the smoke and the leak stopped later last night after i took it for a drive. the radiator cap is in good shape but the reservoir is kinda low. ill top that off later. but his morning when i went to leave for school the car shut off in reverse and would only crank over after that. i just replaced the carb and the exhaust and my transmission has no 3rd gear and needs to be manually shifted but that shouldnt make the car shut off. it runs fine in park and neutral but if i am stopped or just running on idle in 1st, 2nd or reverse the car will shutter and turn off. im really getting frustrated because i have no clue whats wrong with it. iv toyed around with adjusting the carb when the car is in park and just when i think its running right it goes back to shutting off. what should i do? also this may or may not help but when i took the carb off to adjust the bolts on it and put it back on the car ran really good and smooth the first time i cranked it over but when i turned it off and started it again in ran bad again
what engine,carb,ignition is it and what did you have replaced exhaust wise, does it still have all the emission stuff on and is it hooked up?
your ignition coil could be going bad. as it goes bad, it cant make a strong spark. when the engine is cold it needs a stronger spark to run than when warm. also it needs the strong spark when the motor is under load. there are restistance specs on coils that you can check with an ohm meter. you need to look those up for the coil that you have on your car now then check it.
my friend came over today and we screwed with the carburetor and we noticed that black smoke is coming out the exhaust and the car still shuts off but now it does when its in park and after it cuts off gas shoots out of the fuel line on top of the carb.
if gas comes out the vent then you are very close to solving the problem. there are 3 possibilitys 1. fuel pressure to high, 2. bad needle and seat in the carb 3 bad float in the carb.
I am firmly convinced that the carb is the problem. I just replaced the distributor cap and ignition wheel and it didn't change anything. I've considered just rebuilding the old carb since I never had this issue with it. Also the new(not realy new but tecently rebuilt) carb I got has a manual chock where the old one had an electric one. When I swapped the carbs I didn't think much of it and just left the wire tucked behind something in the engine bay. If the float is bad could I just take the one out of the old carb and, if the choke is an issue, could I swap the chokes?
well i just swapped the carbs so the old one would be on there but the same thing is still happening im going to get a new float and rebuild kit tomorrow. if it is the fuel pressure how do i adjust it/ tell what it is? and also im not sure if this is a big deal but the hard line that used to run from the carb to the exhaust manifold used to be stuck inside the manifold now it just slides right out, not sure if it matters but it seemed kinda weird to me.
Alright so here's the rundown, I rebuilt the carb and put a new float in it, I replaced the distributor cap and wheel and I am still having the same issue. Gas is still spraying out of the little brass cut-off tube on top of the carb right after it shuts off. And now if I put the gas all the way to the floor the engine barely revs at all. It may be that I did not rebuild the carb correctly so tomorrow I'm going to give it another go and use the included diagram and instructions this time and heck I might even use some carb spray. But I am still not convinced that the issue is the carburetor, Bryant said it could be the fuel pressure but how do I adjust it and what else could it be and how would I fix it? I really want to get my car running so my friends and I can line up our cars in the school parking lot, mine first of course. Age before beauty so it would go an 87 blazer then a 78 f350 flatbed and then my car but I still say mine is the best looking especially when compared to a chevy.
