mozesmedia
Member
- Joined
- May 12, 2013
- Messages
- 23
- Reaction score
- 0
- Location
- Belgium
- My Car
- 1972 Mustang Fastback 250 6 Cyl.
Hey,
It's been a while since I've posted something. I had some issues with my carburetor on my 1972 250ci fastback. He really hesitated a lot when accelerating and almost no throttle response. It was a bit like driving an old tractor. I really had to balance the clutch to drive it somewhat smoothly.
My mechanic stated it was the carburetor that was worn out someplace. (when I pulled him of I heard a rattling sound in the choke control) I looked a lot on Ebay to find an identical carburetor (Carter RBS) and repair kit for the old one. (Since I live in Belgium, sending this overseas costs quite a lot.) When it came I pulled the old one of and replaced him with the new one. (the thread on the fuel line connection was worn, so it wasn't a "never been used" like the stated). But it worked like a charm! He started right away. The throttle response was immediate and so light, I was happy as a child.
I thought i could tweak it a bit better to get a 100% smooth ride and idle with the mixture screws. But I couldn't seem to get it right. So I remembered I forgot to adjust the float prior to installing the carb. I thought the fuel bowl was a bit too full. So I checked the old carb and adjusted the new one like the old one (the float in the new carb was set about 1,5mm higher than the old one). But it didn't make any difference.
So when I drive it now the throttle response is awesome but I can feel that he hesitates while accelerating and maintaining speed. And when I brake on the engine, I hear popping from the exhaust (sounds great but I know it isn't supposed to be like that, so I think he is running rich). When idling he runs a bit rough. Where the old carb did run a smooth idle.
I hope I've been clear with my explanation since english isn't my native language.
Would there be things I should try before pulling it of again? I'm a bit afraid that worn thread will become useless. All other systems were checked by a classic mustang mechanic locally.
It's been a while since I've posted something. I had some issues with my carburetor on my 1972 250ci fastback. He really hesitated a lot when accelerating and almost no throttle response. It was a bit like driving an old tractor. I really had to balance the clutch to drive it somewhat smoothly.
My mechanic stated it was the carburetor that was worn out someplace. (when I pulled him of I heard a rattling sound in the choke control) I looked a lot on Ebay to find an identical carburetor (Carter RBS) and repair kit for the old one. (Since I live in Belgium, sending this overseas costs quite a lot.) When it came I pulled the old one of and replaced him with the new one. (the thread on the fuel line connection was worn, so it wasn't a "never been used" like the stated). But it worked like a charm! He started right away. The throttle response was immediate and so light, I was happy as a child.
I thought i could tweak it a bit better to get a 100% smooth ride and idle with the mixture screws. But I couldn't seem to get it right. So I remembered I forgot to adjust the float prior to installing the carb. I thought the fuel bowl was a bit too full. So I checked the old carb and adjusted the new one like the old one (the float in the new carb was set about 1,5mm higher than the old one). But it didn't make any difference.
So when I drive it now the throttle response is awesome but I can feel that he hesitates while accelerating and maintaining speed. And when I brake on the engine, I hear popping from the exhaust (sounds great but I know it isn't supposed to be like that, so I think he is running rich). When idling he runs a bit rough. Where the old carb did run a smooth idle.
I hope I've been clear with my explanation since english isn't my native language.
Would there be things I should try before pulling it of again? I'm a bit afraid that worn thread will become useless. All other systems were checked by a classic mustang mechanic locally.
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