Bogging down - Ford Bronco Forum
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post #1 of 8 (permalink) Old 03-17-2017, 04:06 PM Thread Starter
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Bogging down

So periodically when I'm cruising my bronco will kinda bog a little bit then get up to speed and go on running normally. I've replaced the accelerator pump and adjusted but it still does it. I have a edelbrock cfm 600 can anyone point me in a direction of what to look for. I've cleaned the carb replaced the accelerator pump replaced fuel pump and filter and I'm stuck now. It ideals great at 600rpm and runs great but sometimes when I'm driving not really accelerating but just kinda cruising it bogs I let go of the gas pedal and press again it goes away.
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post #2 of 8 (permalink) Old 03-17-2017, 09:34 PM Thread Starter
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Need help 😢

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post #3 of 8 (permalink) Old 03-17-2017, 10:05 PM
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Fuel pressure?
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post #4 of 8 (permalink) Old 03-17-2017, 11:00 PM Thread Starter
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Quote:
Originally Posted by wyatt earp View Post
Fuel pressure?
It's got 5 psi. And it only happens sometimes and it's momentarily.

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post #5 of 8 (permalink) Old 03-18-2017, 10:40 AM
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Yo K,
Vacuum leak. See Engine Testing with a Vacuum Gauge
Ignition timing retarded too far.
Accelerator pump nozzle has dirt in it.
Accelerator pump cup swollen up from contact with bad gas or chemicals.
Economizer jet too small or partly blocked.
Choke pull-off open too far.
Secondary throttle plates not closing all the way.
Vacuum hoses hooked up wrong.
Idle jet partly blocked with dirt.
Distributor timing not advancing properly. (worn breaker plate, worn shaft, pin hole in diaphram, crack in hose, etc.)

Warm Engine Drivability Problem:
1)Vacuum leak somewhere, or hose off or hooked to wrong vacuum fitting.
2) Accelerator pump problems. Iggie
3) Float level set very low.
4) Ignition timing retarded.
5) Dirty idle jet or economizer jet.
6) Idle speed set too fast & mixture is too lean (common!).
7) Idle cut-off solenoid not working, or no power to it or no ground to it.
8) Frozen or binding heated air inlet (stuck in full hot or full cold position).
9) EGR valve stuck on or coming on too early (hose on wrong?)

More @ Warm Engine Drivability Problem
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post #6 of 8 (permalink) Old 03-18-2017, 11:06 AM
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I had an edelbrock on my old chevy and it was nothing but problems, replaced it with a Demon carb and she never ran better

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post #7 of 8 (permalink) Old 03-19-2017, 02:50 AM
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Check the Power Enrichment Valve, when they go bad you end up dumping fuel down the throat of the carb and bog down the engine until you come up in speed and the engine can handle the extra gas.

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post #8 of 8 (permalink) Old 03-19-2017, 10:51 AM
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@Ziggy When the power valve goes bad, wouldn't he have black exhaust and idle issues?
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