All, I've been fighting this hesitation since I got it back on the road after years of sitting, '96 was the last time it was registered.
Symotoms: Hesitation when engine is colder, get less noticeable when warm, but still definitely there. Feels like someone has a tow strap hooked up and is hitting the brakes causing drag. I would say it was in the primary circuit of the carb since once I get into the secondary there seems to be no hesitation at all. If the choke is slightly pulled it will help mitigate the issue. One other symptom, on really cold days the cold start doesn't seem to operate correctly, it will start up fine, but will slowly die unless the gas pedal is feathered a bit then it will operate as normal.
Completed engine/drivetrain work to get it back to road worthy: I've gone through all the emissions systems, PCV, EGR, Decel Fuel cut etc... double checked all the vacuum lines for correct location and breaks. vacuums good, no intake leaks, verified intake manifold is cracked, replaced PCV and verified PCV circuit is working, rebuilt carb, replaced plugs, wires, cap and rotor, good air cleaner, new Cat and exhaust. Compression is good on all cylinders, valves adjusted. New clutch, rebuilt H55F and T-Case.
All work has been completed by myself via Toyota manuals per specs. I started doing diesel swaps in my LandCrusiers a few years back so I haven't dug into a 2F for quite a while. I've rebuilt my share of 2F's engine/carbs etc... so I am very familiar with about every aspect of these motors, but this one has me stumped for now, what am I missing?
All suggestions are welcome!!! (I'll eventually find it given enough time, but I'm lacking the time right now so hoping to utilize this resource to help clear this up a little quicker, it is a daily driver)
Possibilities: Thinking maybe it's a distributor/Advance issue, although it seems to be functioning as expected and timing is set without issue. Carburetor issue??? (possibly, but the rebuild went great with no issues, and this isn't my first build, not saying I didn't miss something since I haven't been into a carb for a while but once in it it was like riding a bike.)
Symotoms: Hesitation when engine is colder, get less noticeable when warm, but still definitely there. Feels like someone has a tow strap hooked up and is hitting the brakes causing drag. I would say it was in the primary circuit of the carb since once I get into the secondary there seems to be no hesitation at all. If the choke is slightly pulled it will help mitigate the issue. One other symptom, on really cold days the cold start doesn't seem to operate correctly, it will start up fine, but will slowly die unless the gas pedal is feathered a bit then it will operate as normal.
Completed engine/drivetrain work to get it back to road worthy: I've gone through all the emissions systems, PCV, EGR, Decel Fuel cut etc... double checked all the vacuum lines for correct location and breaks. vacuums good, no intake leaks, verified intake manifold is cracked, replaced PCV and verified PCV circuit is working, rebuilt carb, replaced plugs, wires, cap and rotor, good air cleaner, new Cat and exhaust. Compression is good on all cylinders, valves adjusted. New clutch, rebuilt H55F and T-Case.
All work has been completed by myself via Toyota manuals per specs. I started doing diesel swaps in my LandCrusiers a few years back so I haven't dug into a 2F for quite a while. I've rebuilt my share of 2F's engine/carbs etc... so I am very familiar with about every aspect of these motors, but this one has me stumped for now, what am I missing?
All suggestions are welcome!!! (I'll eventually find it given enough time, but I'm lacking the time right now so hoping to utilize this resource to help clear this up a little quicker, it is a daily driver)
Possibilities: Thinking maybe it's a distributor/Advance issue, although it seems to be functioning as expected and timing is set without issue. Carburetor issue??? (possibly, but the rebuild went great with no issues, and this isn't my first build, not saying I didn't miss something since I haven't been into a carb for a while but once in it it was like riding a bike.)