Fort Knox
SILVER Star
1977 FJ40. Replaced the stock carb with a Trollhole carb about 18 months ago. The problem actually started with the stock carb, but has continued after installing the THC carb.
Starts fine. Idles fine. For the most part, runs fine once it's moving. The problem is taking off from a stop when idling. When I hit the gas from a stop at idle, it tries to cut out or stumbles badly. If I pump it a little to get the rpm's up before letting out the clutch, it's good and then no problem at all going through the gears all the way up to "highway speed". It does this whether the engine is cold or hot. It does occasionally stumble a little if I slow down to take a turn and the rpm's get down low while in gear, then when I go to get back on the gas going through the turn it will buck a little.
I tried the carb replacement, which seemed at first to help, but quickly started exhibiting the same issues. I've replaced the fuel filter under the hood a couple of times, which seems to help a little at first, but not for long. My first thought is "crud in the gas tank" or fuel pump, but I would think that would affect it at other RPM's, not just right off idle. Site glass seems to show the fuel level right about in the middle most of the time.
Thoughts anyone?
Starts fine. Idles fine. For the most part, runs fine once it's moving. The problem is taking off from a stop when idling. When I hit the gas from a stop at idle, it tries to cut out or stumbles badly. If I pump it a little to get the rpm's up before letting out the clutch, it's good and then no problem at all going through the gears all the way up to "highway speed". It does this whether the engine is cold or hot. It does occasionally stumble a little if I slow down to take a turn and the rpm's get down low while in gear, then when I go to get back on the gas going through the turn it will buck a little.
I tried the carb replacement, which seemed at first to help, but quickly started exhibiting the same issues. I've replaced the fuel filter under the hood a couple of times, which seems to help a little at first, but not for long. My first thought is "crud in the gas tank" or fuel pump, but I would think that would affect it at other RPM's, not just right off idle. Site glass seems to show the fuel level right about in the middle most of the time.
Thoughts anyone?