really rough idling 327/250 engine

[Rick Gouda]

My 65 coupe sits for long periods of time. It is now extremely hard starting, and will only stall at idle. I have replaced the fuel filter. The distributor is only 2 years old as is a carb rebuild. It was stored with stabil. I added new, fresh fuel to the tank. Any recommendations to getting this back to normal?
Thanks alot.

[Ed Jennings]

Re: really rough idling 327/250 engine

Fuel quality may be an issue, but depending on storage conditions, you nay also have a problem with moisture and/or corrosion in the ignition. Make sure connections are clean and that inside of distributer cap has not gotten condensation in it.

[Ed Jennings]

Re: really rough idling 327/250 engine

Fuel quality may be an issue, but depending on storage conditions, you nay also have a problem with moisture and/or corrosion in the ignition. Make sure connections are clean and that inside of distributer cap has not gotten condensation in it.

[Jim T.]

Re: really rough idling 327/250 engine

Even though you mentioned that your carb rebuild is only two years old I would suspect the carb as the problem since your car is not driven that much. From experience you could be surprised at what you could find if you would do a through inspection of what is inside the carb. Sitting for long periods the gas actually evaporates because the carb is vented and not sealed like modern day fuel injected systems that will usually crank right up with a turn of the key. To keep fuel topped up in two of my Holley equipped cars I inject fuel into the bowls when they are not driven.

[Jim T.]

Re: really rough idling 327/250 engine

Even though you mentioned that your carb rebuild is only two years old I would suspect the carb as the problem since your car is not driven that much. From experience you could be surprised at what you could find if you would do a through inspection of what is inside the carb. Sitting for long periods the gas actually evaporates because the carb is vented and not sealed like modern day fuel injected systems that will usually crank right up with a turn of the key. To keep fuel topped up in two of my Holley equipped cars I inject fuel into the bowls when they are not driven.

[Pat Bush #35083]

Re: really rough idling 327/250 engine

Rick -

All the other posts are true, I might add a bad vacuum leak would also cause rough idle and hard starting. You might also give a check on the points to make sure they are not burned.

Pat

[Pat Bush #35083]

Re: really rough idling 327/250 engine

Rick -

All the other posts are true, I might add a bad vacuum leak would also cause rough idle and hard starting. You might also give a check on the points to make sure they are not burned.

Pat

[Ed Jennings]

Re: really rough idling 327/250 engine

When I purchased my 67 several years back it had spent a lot of sitting time. After a couple of months it would not idle at all. I found the rear bowl was venting fuel directly to the venturi. The rear bowl turned out to be full of crud, which had lodged in the needle valve. A good cleaning was all it took. I assume you have a WCFB, but it could be seeing a similar problem. Look into the carb when it's running and see if fuel is entering anywhere it shouldn't be.

[Ed Jennings]

Re: really rough idling 327/250 engine

When I purchased my 67 several years back it had spent a lot of sitting time. After a couple of months it would not idle at all. I found the rear bowl was venting fuel directly to the venturi. The rear bowl turned out to be full of crud, which had lodged in the needle valve. A good cleaning was all it took. I assume you have a WCFB, but it could be seeing a similar problem. Look into the carb when it's running and see if fuel is entering anywhere it shouldn't be.

[Steve D.]

Re: really rough idling 327/250 engine

Jim

How do you "inject" into the bowls ?

Steve

[Steve D.]

Re: really rough idling 327/250 engine

Jim

How do you "inject" into the bowls ?

Steve

[Jim T.]

Re: really rough idling 327/250 engine

What I use is a big syringe that I bought at the Farmers CO-OP that is used for farm animals. It holds just over one ounce or 35CC's. I didn't buy a needle. I use a plastic tube inserted onto the end of the syringe. The plastic tubes that come attached to your household spray cleaners should give you ample supply to choose from. Drawing the gasoline from a gas can I then either inject the gasoline into the vent tubes or on one of my Holley carbs it has float level sight screws that when removed will indicate when the bowl is full with fuel coming out the hole. One thing I have found to make it easier is to lubricate the seal when the filling of the syringe becomes difficult because of the properities of the fuel affecting the movement of the seal.

[Jim T.]

Re: really rough idling 327/250 engine

What I use is a big syringe that I bought at the Farmers CO-OP that is used for farm animals. It holds just over one ounce or 35CC's. I didn't buy a needle. I use a plastic tube inserted onto the end of the syringe. The plastic tubes that come attached to your household spray cleaners should give you ample supply to choose from. Drawing the gasoline from a gas can I then either inject the gasoline into the vent tubes or on one of my Holley carbs it has float level sight screws that when removed will indicate when the bowl is full with fuel coming out the hole. One thing I have found to make it easier is to lubricate the seal when the filling of the syringe becomes difficult because of the properities of the fuel affecting the movement of the seal.