Bucking and jumping

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Nov 3, 2002 | 03:19 PM

#16

timinoh

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Joined: Jul 2000

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Bucking and jumping

I am not a mechanic or Ford wizard, but I had this problem some time ago with my 1992 F150 Custom, injected 300ci I-6, auto. My bucking wasn't particularly strong but it was happening consistantly at cruising speeds. Problem didn't appear very often when I burned 93 octane gas, but did when I burned 87 octane that factory specified. Wouldn't happen on hills or during acceleration. My dad, on hearing my symptoms, guessed it was some kind of "lean burn" problem. For some reason the problem went away and returns only occasionaly.

Knowing what I know I would have to agree with PaulHenderson. I thing it is a fuel/air mixture issue related to the EGR system. Follow his recommendations as per restricter. I will if my problem returns full time.

Nov 3, 2002 | 05:59 PM

#17

DAFields

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Joined: Oct 2002

Posts: 2

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From: Glasgow USA

Bucking and jumping

Don, Thanks for the info. And, yes, mine is a 300cid EFI with 157k miles on it. The fuel pressure regulator sounds like a good place to start

Dec 15, 2002 | 12:15 PM

#18

lexidog

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Joined: Dec 2002

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From: plainview pierce

Bucking and jumping

Need help with fixing a problem of when pushing down on gas pedal my 1986 302 ford van, bucks, jerks, has loose of power to engine. I have replaced the distributor, rotor, full pump, fuel filter,& spark plugs. It will run alright for a short time after replacing each of these things then it starts again. Runs good while idling. Any suggtions for my problem from anyone.

Dec 16, 2002 | 11:28 AM

#19

91pcup

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Joined: Jun 2002

Posts: 23

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From: Coeur d'Alene USA

Bucking and jumping

Put a restrictor plate on your egr. Your problem should be solved.
It worked for me, my truck having the same symtoms. Now she purrs.

91 F150 4x4
300 six 5 speed

Dec 16, 2002 | 12:38 PM

#20

CrazyFordMan

Senior User

Joined: Sep 2002

Posts: 260

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From: prince george canada

Bucking and jumping

Can i please get some more info on the EGR restrictor plate please

1992 F250 r/c l/b 4X4 351 ZF5spd 33" BFG Allterrains clarion CD MTX 6500D amp pushin 2 12" 6000 series subs

Dec 28, 2002 | 11:27 AM

#21

lexidog

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Joined: Dec 2002

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From: plainview pierce

Bucking and jumping

Well I'm back I finally got the problem fixed (jumping& jerking).I keeped replacing parts but it ended up being THE STRAINER FILTER BEFORE THE GAS PUMP.THE STRAINER IS A PAN CAKE FILTER HIDDEN UNDER A 1/4 STEEL PLATE ON THE FRAME BEFORE THE PUMP.This is the one you should change more often than the one after the pump or when lacking getty up and go . This filter was 1/3 the size the one after the pump.napa had the filter on hand. you just unscrew bottom with oil filter gripper pull out pancake filter out of bowl put new one in screw back in place .WATCH THE NEW O RING YOU PUT IN ,IT COULD FLIP OUT & GET PINCHED.

Dec 28, 2002 | 08:43 PM

#22

87granny302

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Joined: Jun 2002

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From: Shawnee

Bucking and jumping

Are you talking about the high pressure pump on the rail? How far before the pump is this filter? I need to look at mine.

Dec 28, 2002 | 09:40 PM

#23

CrazyFordMan

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Joined: Sep 2002

Posts: 260

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From: prince george canada

Bucking and jumping

Do I have one of those i dont think i do but you never know
1992 F250 r/c l/b 4X4 351 ZF5spd 33" BFG Allterrains clarion CD MTX 6500D amp pushin 2 12" 6000 series subs

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Dec 29, 2002 | 09:55 PM

#24

lexidog

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Joined: Dec 2002

Posts: 5

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From: plainview pierce

Bucking and jumping

hi. mine was on a 86 van with dual tanks .mine was no further than a foot.It's hid behind a 1/4 steel plate ,it has each rubber line from the tanks coming into the top side ,rite now I can't remember if the switching value was before or after.you'll proble have a hard time getting the 4 bolts out.good luck. bye Lexidog

Dec 29, 2002 | 10:45 PM

#25

steve83

Post Fiend

Joined: Nov 2002

Posts: 9,987

Likes: 7

From: Memphis, TN

Bucking and jumping

Dec 30, 2003 | 08:04 AM

#26

melvind

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Joined: Dec 2003

Posts: 17

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what???? Is this "pancake filter on my 97 F150?. I am having the same problem when I accelerate at low speeds. If I really get on the gas it seems to not happen.