Misfire/hesitation under acceleration.
#1
Misfire/hesitation under acceleration.
My truck which I purchased about a moth ago is having issues with acceleration it will almost stall when it to the floor accelerating. If I baby it it'll accelerate fine. Wearable's have been replaced cap and rotor plug wires, vacuum line etc any ideas?
#2
#3
In addition to what Tedster said, did you also replace the spark plugs themselves? If so, what did you gap them at? You said wires, but not plugs specifically, so I wanted to make sure.
And so I don't have to go click on your information, what year and model is the truck, and which engine? Along with, what engine mods, if any, do you know were done to yours? Are you running a points ignition, or electronic?
If points, there are quite a few other tests to do to make sure it's not an ignition misfire causing your trouble under load. Or even something as simple as too large a plug gap.
Good luck.
Paul
And so I don't have to go click on your information, what year and model is the truck, and which engine? Along with, what engine mods, if any, do you know were done to yours? Are you running a points ignition, or electronic?
If points, there are quite a few other tests to do to make sure it's not an ignition misfire causing your trouble under load. Or even something as simple as too large a plug gap.
Good luck.
Paul
#4
#6
Any modifications to the engine that you know of? For instance, having all the "smog crap" removed? Some engines can be re-tuned for that, while some just never run right after tossing out or defeating the purpose of some of the factory equipment.
Well, they can all be re-tuned. Just depends on how much tweaking the owner is willing or able to go through to get back to the way it ran originally.
Can you post up a picture of your under-hood area so we can see what you're running? Maybe someone will be able to see a non-stock carburetor, or a missing PCV valve, or non-functioning EGR valve, or something like that.
A weak spark from a failing ignition can do it too, but that usually is accompanied by generally not running right too. Not just under acceleration.
Good luck.
Paul
Well, they can all be re-tuned. Just depends on how much tweaking the owner is willing or able to go through to get back to the way it ran originally.
Can you post up a picture of your under-hood area so we can see what you're running? Maybe someone will be able to see a non-stock carburetor, or a missing PCV valve, or non-functioning EGR valve, or something like that.
A weak spark from a failing ignition can do it too, but that usually is accompanied by generally not running right too. Not just under acceleration.
Good luck.
Paul
#7
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#8
Any modifications to the engine that you know of? For instance, having all the "smog crap" removed? Some engines can be re-tuned for that, while some just never run right after tossing out or defeating the purpose of some of the factory equipment.
Well, they can all be re-tuned. Just depends on how much tweaking the owner is willing or able to go through to get back to the way it ran originally.
Can you post up a picture of your under-hood area so we can see what you're running? Maybe someone will be able to see a non-stock carburetor, or a missing PCV valve, or non-functioning EGR valve, or something like that.
A weak spark from a failing ignition can do it too, but that usually is accompanied by generally not running right too. Not just under acceleration.
Good luck.
Paul
Well, they can all be re-tuned. Just depends on how much tweaking the owner is willing or able to go through to get back to the way it ran originally.
Can you post up a picture of your under-hood area so we can see what you're running? Maybe someone will be able to see a non-stock carburetor, or a missing PCV valve, or non-functioning EGR valve, or something like that.
A weak spark from a failing ignition can do it too, but that usually is accompanied by generally not running right too. Not just under acceleration.
Good luck.
Paul
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