bogs down on acceleration
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bogs down on acceleration
another problem. i have a 83 f150 with 302. ill be driving down the road and slowly accelerating and itll be fine. but if i give it a lot of gas it bogs down and then after a few seconds itll boost forward a little then drop down again. also its hard as hell to get it running in the morning. it also stalls in park when i give it a lot of gas. i was thinking timing and was messing around with that, but i dont have a timing light nor the money to buy one with, so i cant get too accurate.
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From: Virginia
It could be the accelerator pump in the carb. Pull the aircleaner off, and with the engine off, look down the carb throat while you push back on on the throttle. You should see two strong streams of fuel pour into the engine. If you don't, then your pump is bad in the carb.
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i checked the accelerator pump. the gas came out in both jets but the streams werent steady and when i held the throttle wide open, no gas came out.
so if the acclerator pump was working id see 2 strong steady streams of gas, right?
so if the acclerator pump was working id see 2 strong steady streams of gas, right?
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From: Denver Metro Area, CO
You'll only see streams *while you're actively opening the throttle* and possibly for a short amount of time at the end of the stroke. It's not like you can open it up (floor the accelerator) and two streams of gas will continually pour down the throat of the carb, it doesn't work that way. It's a mechanically-actuated pump, and it pumps *as you push the gas pedal to the floor* (or do it with your hand). Or am I confused?
-chris
colorado, usa
-chris
colorado, usa
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You should get a nice even shot when you open the throttle plates quickly. By the time you get to WOT you won't see anything, you are already at the end of the pumps travel.
The accelerator pump is just to get you moving and it gives it an initial shot in the *** until the primary jets take over.
The accelerator pump is just to get you moving and it gives it an initial shot in the *** until the primary jets take over.
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From: Virginia
Strong and steady streams are what you want. Any delay or dribbling is not good. If you are not getting much fuel in the engine when you do this, this will also explain the hard starting when cold, since not much fuel would be entering the engine to prime it to start in the morning.
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yeah. ive been planning on getting a new carb for awhile. i have the 2bbl motorcraft 2150. i am hoping to get a decent priced 4 bbl thats decent for offroading. ive looked at the truck avengers and they look nice. where would the chepaest place be to get one? ebay? and howe much extra gas would i burn? i already get bad mileage and drive like my grandma. ive heard the change in gas mileage wouldnt be bad if u stayed outta the secondaires.
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From: Denver Metro Area, CO
Originally Posted by alexjp91
ive looked at the truck avengers and they look nice. where would the chepaest place be to get one? ebay?
I got one of these for around $230 + shipping:
http://cgi.ebay.com/ebaymotors/670CFM-Holley-Refurbished-0-90670-TRUCK-AVENGER-Carb_W0QQcmdZViewItemQQ_trksidZp1742Q2em153Q2el126 2QQcategoryZ33550QQihZ023QQitemZ360025168463
Originally Posted by alexjp91
and howe much extra gas would i burn? i already get bad mileage and drive like my grandma. ive heard the change in gas mileage wouldnt be bad if u stayed outta the secondaires.
-chris
colorado, usa
