As the title states, I have a terrible bog when I punch the gas. Worse from a stand still but still bad at cruising speed. I've fought this battle for months, and have searched the internet plenty. Unfortunately, I don't have any local speed shops, nor do I know any knowledgeable hot-rod enthusiasts.
Note - car runs great aside from the bog.
Specs are in the attached image. For the sake of ease, I will aim to note what I have and haven't tried.
Bought car. 1984 Monte. Had a newly swapped 350 in it. Had a bog when I got it. Note - came with new fuel pump installed.
Sent the car to a shop and had a lot of work done (see attached image for specs). Upon getting the car back - still had the same bog. Note - went from the original Rochester carb to an eddy 650 at this point. Running original distributor (ECM controlled) with msd cap and coil.
Bought a brand new Eddy 650 carb - still bogging.
Swapped in a freshly rebuilt 350, bored 40 over. Used all parts from "old" motor. Note - never verified what cam was in this new engine. Mystery cam.
Replaced the distributor with a GM HEI, using MSD cap and rotor - still bogging.
Returned the 'new' carb and put the old one back on.
Tried several different timing adjustments: 8 to 15 initial...34 to 40 total.
Tried all 3 accelerator pump slots - none seemed to make much difference.
Put lighter springs in distributor. Seemed to have gotten worse, if anything.
Added fuel pressure regulator. Tried 5, 5.5, and 6 psi.
Bent accelerator pump forward and backward - little if any improvement.
Adjusted the secondary air flap in 1/4 turn increments from 0 to 5 turns (5 seemed grossly too much tension).
Replaced fuel filter.
Things I haven't done:
Messed with fuel tank - sending unit or possible filter
Why is my car bogging when I punch it?!?!
When I attempt to brake-torque...the car will stall. 😭
I'm thinking this car should be wicked...but embarrassing when you can't even get on it. What am I missing? Or did I answer my own question regarding the fuel tank??? 🤔 If it is a fuel filter or something, wouldn't it effect things other than when I am off idle and gun it?
Any thoughts appreciated!
Note - car runs great aside from the bog.
Specs are in the attached image. For the sake of ease, I will aim to note what I have and haven't tried.
Bought car. 1984 Monte. Had a newly swapped 350 in it. Had a bog when I got it. Note - came with new fuel pump installed.
Sent the car to a shop and had a lot of work done (see attached image for specs). Upon getting the car back - still had the same bog. Note - went from the original Rochester carb to an eddy 650 at this point. Running original distributor (ECM controlled) with msd cap and coil.
Bought a brand new Eddy 650 carb - still bogging.
Swapped in a freshly rebuilt 350, bored 40 over. Used all parts from "old" motor. Note - never verified what cam was in this new engine. Mystery cam.
Replaced the distributor with a GM HEI, using MSD cap and rotor - still bogging.
Returned the 'new' carb and put the old one back on.
Tried several different timing adjustments: 8 to 15 initial...34 to 40 total.
Tried all 3 accelerator pump slots - none seemed to make much difference.
Put lighter springs in distributor. Seemed to have gotten worse, if anything.
Added fuel pressure regulator. Tried 5, 5.5, and 6 psi.
Bent accelerator pump forward and backward - little if any improvement.
Adjusted the secondary air flap in 1/4 turn increments from 0 to 5 turns (5 seemed grossly too much tension).
Replaced fuel filter.
Things I haven't done:
Messed with fuel tank - sending unit or possible filter
Why is my car bogging when I punch it?!?!
When I attempt to brake-torque...the car will stall. 😭
I'm thinking this car should be wicked...but embarrassing when you can't even get on it. What am I missing? Or did I answer my own question regarding the fuel tank??? 🤔 If it is a fuel filter or something, wouldn't it effect things other than when I am off idle and gun it?
Any thoughts appreciated!