poor acceleration in 3rd
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poor acceleration in 3rd
- Thread starter 79cj5
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BajaEdition
Resident 'Old' Jeep Shaman
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Did you install all of this? or a shop?
with all that new you could have a multitude of problems on the tuning end.
ok, what is the manifold vacumn? and what is the recomended vacumn for the engine, is that a stock carb or a upgrade? Who set the float on the carb? whi set the preasure from the fuel pump. or does the carb have a preasure range it need to receive and or be restricted to? Who set the distributer? are they sure the thing is in perfect alignment with the crank? could it be off a gear or 2? have you set the dewell properly? All wires in proper place? Last thing I would worry abouut is a new Cat till all the other things are checked.
One more thing, the linkage to the accelerator pump, see if that is working good as a first step.
with all that new you could have a multitude of problems on the tuning end.
ok, what is the manifold vacumn? and what is the recomended vacumn for the engine, is that a stock carb or a upgrade? Who set the float on the carb? whi set the preasure from the fuel pump. or does the carb have a preasure range it need to receive and or be restricted to? Who set the distributer? are they sure the thing is in perfect alignment with the crank? could it be off a gear or 2? have you set the dewell properly? All wires in proper place? Last thing I would worry abouut is a new Cat till all the other things are checked.
One more thing, the linkage to the accelerator pump, see if that is working good as a first step.
Old Dog
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^^Baja has a lot of good points there^^
If the cat is new that shouldn't be the problem.
a 3 speed has a wide range between gears are you use to this, or have you had the jeep for a while and it just now started acting like this?
If the cat is new that shouldn't be the problem.
a 3 speed has a wide range between gears are you use to this, or have you had the jeep for a while and it just now started acting like this?
BajaEdition
Resident 'Old' Jeep Shaman
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70 cj6 4 inch lift
I know it may be a mute point now, but do one thing at a time
carb kit, tune it in. it coould be several things there, distributor, tune it in
etc etc etc, trying to find the problem with a bunch of new stuff can be hard, so take the list and do one at a time, till you get to the end and if you find several things were wrong you will have to go through the list again as each thing can effect the other.
Just trying to help
check accelerator pump linkage
check for a good seal with the manifold to carb gasket
check fuel pressure and see if it is in range
check the manifold vacuum
check firing order
check dewell
if you still have a problem check the set of the distributor
if the carb is aftermarket, you may need to take it to a carb specialist, that means an old mechanic, and have it checked for jet sizing and all.
most younger guys do not have the experience to work on carbs
carb kit, tune it in. it coould be several things there, distributor, tune it in
etc etc etc, trying to find the problem with a bunch of new stuff can be hard, so take the list and do one at a time, till you get to the end and if you find several things were wrong you will have to go through the list again as each thing can effect the other.
Just trying to help
check accelerator pump linkage
check for a good seal with the manifold to carb gasket
check fuel pressure and see if it is in range
check the manifold vacuum
check firing order
check dewell
if you still have a problem check the set of the distributor
if the carb is aftermarket, you may need to take it to a carb specialist, that means an old mechanic, and have it checked for jet sizing and all.
most younger guys do not have the experience to work on carbs
jeep cj7 304
Active Jeeper
3rd is NOT an acceleration gear. You can try doing some timing adjustment if you want, but more power is the only thing that can really help.
ballzdeep
Jeeper
Check Vaccum advance, it may need some love. Also dont just check the vac advance, check the tube that runs out of it as it may be plugged. That tends to happen from time to time.
also you may want to check spark plug gap, and be sure the points are set properly
also you may want to check spark plug gap, and be sure the points are set properly
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