Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor, By Properly Adjusting The Accelerator Pump Assembly If your car or truck is equipped with a Holley four barrel carburetor and stumbles upon acceleration, more than likely the carburetor needs an adjustment to the accelerator pump assembly. The vehicle is a 70 El Camino SS 396 with a Q-jet carb. Da_Raabi ... is opening too soon and bogging the motor down. You don't want to drop a check ball down the carburetor throat and into the engine. The inability to reach full power during a full-throttle trigger is also a sign of bogging down. Test ran good - but after 10 mins of highway speed, exited, and re-entered the highway - the hesitation continues on acceleration. A Dirty Carburetor. If you attempt to accelerate too hard off idle, to the point where the secondaries kick in, the car bogs and stumbles to the point where it dies unless you lift your foot off the pedal. if you crack the throttle hard from idle on a smoker and it goes baooooor and dies it is lean, the motor sucks a huge gob full of air and dies, if you replaced the carb with say a 30mm item it would never happen . you might want to try unplugging the parking brake sensor it helped me. Ok, here is the story. Soft acceleration (10%)is livable, but any more (20-50%) throttle and she stumbles / hesitates. Apr 25, 2014 #1. Another common reason for an engine bog is a dirty carburetor. A bog from idle is a lean condition not a rich condition ! A dirty or clogged air filter is one of the most common reasons for an engine bog under acceleration. The three adjustment screws in the carburetor ((High speed, Low speed and idle) come in handy when preventing stalling. Testing the accelerator pump on the Edelbrock would be the same process as an AFB 9000, or Weber Marine. You can sometimes track down an airleak by spraying carburetor cleaner on a suspect sealing/joint area and listening closely to see if the engine RPM's change (sucking carb cleaner fumes into carburetor will also do this, so be careful when working near the carburetor). Grabbing a new vacu gauge from HF (to retest) and a can of brake cleaner. Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor, By Properly Adjusting The Accelerator Pump Assembly. Prior to yesterday, the car ran great better than it has ever run before. I just started noticing a back firing and stumbling when you accelerate from idle. Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor By Properly Adjusting The Accelerator Pump Assembly. If your car or truck is equipped with a Holley four barrel carburetor and stumbles upon acceleration, more than likely the carburetor needs an adjustment to the accelerator pump assembly. hard acceleration, either on the street or on the freeway, and the engine bogs for a second, gets past the flat spot, and I have good solid acceleration as long as I hold the pedal down. A clogged engine air filter causes an inefficient and polluted air and fuel mixture, thus bogging down the engine. I am here !!!!! This test is best done with the carburetor off of the car. Pulled the top off the carb, no sediment. Adjusting the idle screw, for instance, is a corrective measure for a chainsaw stalling when idle. I dont want to argue with anyone but I have not ever come across a rich bog and die , weather … As Gary S say's you need to slow the opening of these valves to slow down the intake of air. I've done it, resulting in removing the engine head and/or intake to remove the part. Quarter or part throttle acceleration is fine and acceleration once the engine is … Will check for intake leak next. i just got my warrior about 3 months ago and it was doing something similar it would idle good but then as soon as you gave it any gas it bogged down really bad and you could barely give it enough gas to get it into gear without stalling. ... on the left side of the carb, viewed from the front of the motor. If your car or truck is equipped with a Holley four barrel carburetor and stumbles upon acceleration, more than likely the carburetor needs an adjustment to the accelerator pump assembly. But if I try light to moderate acceleration, it bogs down. it is located on the clutch lever it is the top wire that is … Quadrajet bog on rolling acceleration Discussion in 'Engine Topic' started by Da_Raabi, Apr 25, 2014. So, it cruises OK on the freeway and on the street. The engine was just rebuilt and the carb was also restored and rebuilt. 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