76 Malibu 350 2bbl Carburator HELP ME!!!!

[thedeem0n]

Okay, I have a 76 Chevy Malibu Classic 4-Door with a 350 under the hood, & it's got the Stock Intake Manifold and 2bbl Carburetor (which I Believe is a Rochester Dual-Jet 210, but I could be wrong). the Problem that I'm having, is that the Accelerator Pump has been wearing out for about a month or two and it's been getting progressively worse by the day...since the Accelerator pump started giving-it-up on me, what happens, is that when I'm accelerating, what happens is that like the engine will start to like "Bog-Out". The Fuel stops getting pumped by the Carburetor & like the ammount of fuel that it's allready pumped like Burns up & the engine stopps getting gas & starts to like Bog-Out until I Fully take my foot off of the gas & then just like barely put any weight or pressure on the gas pedal & then it'll usually just keep running at like JUST-Above Idle RPM. Last Night I drove it on Massachusetts Route-9 about 40 Miles from my house (in Framingham, MA) to Worcester State College Dorms (in Worcester, MA). & Last night, the way I usually try to Squeek-By with the Worn-Out Accelerator Pump Stopped Working & It was leaving me with a Stalled '75 Chevelle Malibu on the middle of Route 9 & it just wasn't getting fuel through the Carburetor at some times....but I got it there to Worcester State & I got it Back home a few Hours later....


My Real Questions Right now... are:
1) If I were to buy a new 2bbl carburetor like this, Could I have it Installed (or install it myself) to the Stock 1976 Malibu Classic; 350 sml block V8, 2bbl Carb, Auto Transmission, Stock Intake Manifold, or would I have to go the full-Nine & buy a new intake manifold too??

2) How would I begin to attack something like a worn-out Accelerator Pump?
....& That about rounds it all off for now....ANY help would be SERIOUSLY Appreciated......PLEASE HELP!!!!!!!!!!!!

[MagicRat]

Originally Posted by thedeem0n

Stock 1976 Malibu Classic; 350 sml block V8, 2bbl Carb, Auto Transmission, Stock Intake Manifold,

Ahem....... ......do I have to state the obvious????
This is the Muscle Car forum, not the Grandma Beater Forum!







Okay, I'm sorry, I couldn't resisit

I do not think your accelerator pump is the problem. It is a component built into the carburetor and only pumps a bit of gas just to avoid a hesitation when you step on the throttle. After a second at most, it stops pumping.

Do you mean fuel pump?

Your problem is that at times of higher fuel use, ie heavy acceleration, highway cruising, etc. your engine stops getting sufficient fuel flow. This can be caused by:

1. blocked or dirty carburetor main jet circuit

2. A restriction in fuel supply, caused by a blocked fuel filter, faulty fuel pump, blocked/rusty fuel line, blocked fuel pick up in fuel tank

3. low fuel level on the carburetor float bowl

I would suggest to remove the fuel line at the carb. Attach a hose to the line and direct it at a bucket. Have someone start the car and observe the fuel flow out the line. It should come out in strong squirts, enough to fill up a coffee cup in a few seconds. If it doesnt, look for remedies associated with item #2, above.

If flow is fine, then consider a rebuilt or new carburetor. They are relatively easy to install. And no, you should not require a new intake manifold. It's virtually unheard of for them to block fuel flow like this.

[thedeem0n]

Well man, I know that it's not the fuel pump because I just had a brand new one put into it less then 2 Months ago. As far as the Fuel Filter goes, (allthough I can't be ABSOLUTELY positive that's not the problem, because believe it or not I have run into that Exact problem before...) I Doubt that it's a Blocked Fuel Filter or a Dirty/F-ed Up Fuel Filter, because I Just had the fuel filter replaced/properly installed less then a year ago...but the car is exibiting similar behavior to the behavior that it was showing when I ran into that problem. Also, when I first bought the car a couple of years ago from a kid right-around the same age as me in Lowell, MA (I live about 20 Miles Dead-West into the suburbs of Boston, MA in a town called Framingham...about 1/2 way between Boston, MA & Worcester, MA...) & when I bought the car from the kid, he did say to Clean the carburetor every-so-often....& I can tell by the car's general behavior that the Fuel Supply is being constricted somewhere along the way....so I can tell that you're no joke man...you know your sh!t....

[MagicRat]

Look at the fuel filter again.
It may be likely your gas tank is starting to rust inside. Rust flakes and debris get sucked up and will block the fuel filter.

When my '68 T-bird had a rusty tank, it would clog the the filter in about 300 miles.

Note - some GM carbs would allow dirty gas to get by a fully blocked filter, so its possible dirty gas has gone and blocked the passages in the carb too.

Change the filter and let us know how dirty the old one looks.