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My 1984 Monaco with a chevy
454 is running strangly.
Under normal load, it 'usually'
runs great. When climbing hills
is runs well if I keep the RPMs
low. If I try to accelerate,
it begins to cough and spit.
If I ease off, it returns to
normal and I climb slowly.
Additionally, under level driving
if I floor it, it will cough,
but slower acceleration isn't a problem.
My 1984 Monaco with a chevy
454 is running strangly.
Under normal load, it 'usually'
runs great. When climbing hills
is runs well if I keep the RPMs
low. If I try to accelerate,
it begins to cough and spit.
If I ease off, it returns to
normal and I climb slowly.
Additionally, under level driving
if I floor it, it will cough,
but slower acceleration isn't a problem.
I'm an engine novice, any ideas?
Sounds as if the secondary portion of your carburetor isn't operating. Get the cover off the engine, remove the air cleaner and start the engine. Watch the choke blade,(front of air horn), as engine warms up to see if it fully opens. If it only opens 1/2 way or so, then you've found the cause. There is a "lock out" pin between the choke linkage throttle "bump" at the base of the carb and the carb secondaries that prevents them from opening on a cold engine, cold being determined by the choke opening. If the choke opens far enough, then floor the pedal, this should cause the secondaries to open, don't look down the carb when you do this, a lean backfire out of the carb could singe your eyeballs. If the secondaries open, but it seems to be lean, then you may have too low a fuel level in the bowl. Today's gasolene may cause the old vitron tipped needles to swell, resulting in lowered fuel levels in the bowl. If the choke opens, but the secondaries won't, then the "lock out" pin may not be properly positioned and not moving far enough out of the way to allow secondary operation to occur.
My 1984 Monaco with a chevy
454 is running strangly.
Under normal load, it 'usually'
runs great. When climbing hills
is runs well if I keep the RPMs
low. If I try to accelerate,
it begins to cough and spit.
If I ease off, it returns to
normal and I climb slowly.
Additionally, under level driving
if I floor it, it will cough,
but slower acceleration isn't a problem.
I'm an engine novice, any ideas?
Replace the spark plug wires and use the original GM wires. Been there done that at least a hundred times in the last 30 years of rv repair.This is a 99.9% sure cure.Easy way to tell is to hook up the rv on a scope and apply a little
pressure in drive. You will see a spike on the scope indicating a defective wire. Best to replace the plugs also in case some fouled because of the wire problem... Ismo
Please let us know how you made out...
My 1984 Monaco with a chevy
454 is running strangly.
Under normal load, it 'usually'
runs great. When climbing hills
is runs well if I keep the RPMs
low. If I try to accelerate,
it begins to cough and spit.
If I ease off, it returns to
normal and I climb slowly.
Additionally, under level driving
if I floor it, it will cough,
but slower acceleration isn't a problem.
I'm an engine novice, any ideas?
Replace the spark plug wires and use the original GM wires. Been there done that at least a hundred times in the last 30 years of rv repair.This is a 99.9% sure cure.Easy way to tell is to hook up the rv on a scope and apply a little
pressure in drive. You will see a spike on the scope indicating a defective wire. Best to replace the plugs also in case some fouled because of the wire problem... Ismo
Please let us know how you made out...
Even stranger? I had the thing DYNO tuned 6 months (but only 500 miles) ago. All plugs and wires were replaced at that time
My 1984 Monaco with a chevy
454 is running strangly.
Under normal load, it 'usually'
runs great. When climbing hills
is runs well if I keep the RPMs
low. If I try to accelerate,
it begins to cough and spit.
If I ease off, it returns to
normal and I climb slowly.
Additionally, under level driving
if I floor it, it will cough,
but slower acceleration isn't a problem.
I'm an engine novice, any ideas?
Replace the spark plug wires and use the original GM wires. Been there done that at least a hundred times in the last 30 years of rv repair.This is a 99.9% sure cure.Easy way to tell is to hook up the rv on a scope and apply a little
pressure in drive. You will see a spike on the scope indicating a defective wire. Best to replace the plugs also in case some fouled because of the wire problem... Ismo
Please let us know how you made out...
Want to check the wires before you relace them? Take the cheapest pocket radio you can find, start the engine, set the brake, drop it in drive, turn on the radio, use the ear plug that came with it in your ear, dial down to the low AM numbers and get off-station, crank the volume up and pass the radio slowly along the wires, a defective wire will produce a popping sound through the radio.
My 1984 Monaco with a chevy
454 is running strangly.
Under normal load, it 'usually'
runs great. When climbing hills
is runs well if I keep the RPMs
low. If I try to accelerate,
it begins to cough and spit.
If I ease off, it returns to
normal and I climb slowly.
Additionally, under level driving
if I floor it, it will cough,
but slower acceleration isn't a problem.
I'm an engine novice, any ideas?
Replace the spark plug wires and use the original GM wires. Been there done that at least a hundred times in the last 30 years of rv repair.This is a 99.9% sure cure.Easy way to tell is to hook up the rv on a scope and apply a little
pressure in drive. You will see a spike on the scope indicating a defective wire. Best to replace the plugs also in case some fouled because of the wire problem... Ismo
Please let us know how you made out...
Want to check the wires before you relace them? Take the cheapest pocket radio you can find, start the engine, set the brake, drop it in drive, turn on the radio, use the ear plug that came with it in your ear, dial down to the low AM numbers and get off-station, crank the volume up and pass the radio slowly along the wires, a defective wire will produce a popping sound through the radio.
In the event the plugs and wire don"t work, check your fuel filter as this sounds like a problem I once had
My 1984 Monaco with a chevy
454 is running strangly.
Under normal load, it 'usually'
runs great. When climbing hills
is runs well if I keep the RPMs
low. If I try to accelerate,
it begins to cough and spit.
If I ease off, it returns to
normal and I climb slowly.
Additionally, under level driving
if I floor it, it will cough,
but slower acceleration isn't a problem.
I'm an engine novice, any ideas?
Replace the spark plug wires and use the original GM wires. Been there done that at least a hundred times in the last 30 years of rv repair.This is a 99.9% sure cure.Easy way to tell is to hook up the rv on a scope and apply a little
pressure in drive. You will see a spike on the scope indicating a defective wire. Best to replace the plugs also in case some fouled because of the wire problem... Ismo
Please let us know how you made out...
Want to check the wires before you relace them? Take the cheapest pocket radio you can find, start the engine, set the brake, drop it in drive, turn on the radio, use the ear plug that came with it in your ear, dial down to the low AM numbers and get off-station, crank the volume up and pass the radio slowly along the wires, a defective wire will produce a popping sound through the radio.
In the event the plugs and wire don"t work, check your fuel filter as this sounds like a problem I once had
Good point if there is an inline filter. The one in the carb at the fuel inlet is spring loaded and will be forced off it's seat if it plugs-up. This is so you won't be left "dead in the water". Indications that it's plugged is minor flooding at idle.
Have you checked the power piston? On a Quadrajet you can push a rod down the vent hole and feel if it is free to move up and down against the spring. If it is stuck, some spray Gumout down the same hole will free things up. It may take overnight soaking.
I had the same symptoms on my 88 Gulfstream. I ended up having an auxiliary fuel pump installed and that fixed the problem. The shop told me the regular fuel pump gets tired after a while, and a seperate pump was the best solution. My 1984 Monaco with a chevy
454 is running strangly.
Under normal load, it 'usually'
runs great. When climbing hills
is runs well if I keep the RPMs
low. If I try to accelerate,
it begins to cough and spit.
If I ease off, it returns to
normal and I climb slowly.
Additionally, under level driving
if I floor it, it will cough,
but slower acceleration isn't a problem.
I'm an engine novice, any ideas?
Replace the spark plug wires and use the original GM wires. Been there done that at least a hundred times in the last 30 years of rv repair.This is a 99.9% sure cure.Easy way to tell is to hook up the rv on a scope and apply a little
pressure in drive. You will see a spike on the scope indicating a defective wire. Best to replace the plugs also in case some fouled because of the wire problem... Ismo
Please let us know how you made out...
Want to check the wires before you relace them? Take the cheapest pocket radio you can find, start the engine, set the brake, drop it in drive, turn on the radio, use the ear plug that came with it in your ear, dial down to the low AM numbers and get off-station, crank the volume up and pass the radio slowly along the wires, a defective wire will produce a popping sound through the radio.
In the event the plugs and wire don"t work, check your fuel filter as this sounds like a problem I once had
Good point if there is an inline filter. The one in the carb at the fuel inlet is spring loaded and will be forced off it's seat if it plugs-up. This is so you won't be left "dead in the water". Indications that it's plugged is minor flooding at idle.
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