Hesitation / Stumbling, runs rich at idle

-
GM 4.3 V6
Bush Series Racing

Nemechek and Earnhardt

Screenshot_20250926-074628_Gallery.jpg


Screenshot_20250926-074507_Gallery.jpg


Nemechek for the win. Those 4.3 V6 engines sounded like Bumblebees going around the track.


☆☆☆☆☆
 
These engines have a 90° V-block with twelve valves activated by a pushrod valvetrain.

The 4.3 L (262 cu in) V6 is the last and most successful engine in the Chevrolet 90° V6 engine family.


2 inch spacer.png


Notice again the 2 inch carb spacer, this time with a Good Running Edelbrock.

Must be a known performance boost with the 2 inch rise, as many are doing it.



* * * * *
 
For the carburetor itself, the Edelbrock 1409 model is a popular choice, which is a 600 cfm, 4-barrel carburetor with an electric choke and single inlet.

This carburetor requires a specific calibration kit, the Edelbrock 1485, to properly tune it for the 4.3L V6 application.

The calibration kit includes metering rods, jets, and step-up springs tailored for the engine's requirements.

____________

Imagine that, a specific calibration kit, the Edelbrock 1485, to properly tune it for the 4.3L V6 application !!!

Screenshot_20250926-213525_Gallery.jpg


This is probably what is wrong with Randy's 4.3 V6 hesitation problem.

Needs a specific calibration kit for the 4.3 V6 engine.

So Yeah, wrong carburetor.


☆☆☆☆☆
 
For the carburetor itself, the Edelbrock 1409 model is a popular choice, which is a 600 cfm, 4-barrel carburetor with an electric choke and single inlet.

This carburetor requires a specific calibration kit, the Edelbrock 1485, to properly tune it for the 4.3L V6 application.

The calibration kit includes metering rods, jets, and step-up springs tailored for the engine's requirements.

____________

Imagine that, a specific calibration kit, the Edelbrock 1485, to properly tune it for the 4.3L V6 application !!!

View attachment 1716460349

This is probably what is wrong with Randy's 4.3 V6 hesitation problem.

Needs a specific calibration kit for the 4.3 V6 engine.

So Yeah, wrong carburetor.


☆☆☆☆☆
Thanks for sharing this information with me, I'll let him know
 
For the carburetor itself, the Edelbrock 1409 model is a popular choice, which is a 600 cfm, 4-barrel carburetor with an electric choke and single inlet.

This carburetor requires a specific calibration kit, the Edelbrock 1485, to properly tune it for the 4.3L V6 application.

The calibration kit includes metering rods, jets, and step-up springs tailored for the engine's requirements.

____________

Imagine that, a specific calibration kit, the Edelbrock 1485, to properly tune it for the 4.3L V6 application !!!

This is probably what is wrong with Randy's 4.3 V6 hesitation problem.

Needs a specific calibration kit for the 4.3 V6 engine.

So Yeah, wrong carburetor.

should run great if his monza has an OMC 800 and V-hull....

[see highlighted]

Screen Shot 2025-09-26 at 10.15.39 PM.png
 

I think that it's interesting
For the carburetor itself, the Edelbrock 1409 model is a popular choice, which is a 600 cfm, 4-barrel carburetor with an electric choke and single inlet.

This carburetor requires a specific calibration kit, the Edelbrock 1485, to properly tune it for the 4.3L V6 application.

The calibration kit includes metering rods, jets, and step-up springs tailored for the engine's requirements.

____________

Imagine that, a specific calibration kit, the Edelbrock 1485, to properly tune it for the 4.3L V6 application !!!

View attachment 1716460349

This is probably what is wrong with Randy's 4.3 V6 hesitation problem.

Needs a specific calibration kit for the 4.3 V6 engine.

So Yeah, wrong carburetor.


☆☆☆☆☆
I told Randy about the calibration kit and he said that don't make a specific kit for any engine so I said what ever.
 
Randy said that's not so

oh, so now "randy" works for edelbrock? knows the calibration settings between marine and auto carbs?

puh-leeze

"randy" can't figure out how to make a crap *** crap V6 run right, i doubt he even knows which end of the wrench to hold, let alone the intricacies of specialized carburetors.
 
The real winner here on this thread is "Myself" with the knowledge that I have gained on researching this out to make these 4.3 V6 engines run.

No easy task, but now I know how to do it.

If it were mine, I would do the Balance Shaft "Delete" then go with the Edelbrock 1409 600 cfm carb with the 1489 Calibration Kit, and of course the stock HEI distributor with and External E-Core coil. Fast burn ignition, timing set to 8 degrees BTDC (because the hot fast spark acutally advances the timing > so back it down 4 degrees to put the fireball in the right spot.)

9:1 cr with large stock valves and the 340 spec grind 1995 roller cam, VR-4 NGK spark plugs and put it in a vehicle that can lay it down...

Run they will, just ask Dale Earhardt

What Randy doesn't know, he will never know...


1d230141-9c11-4885-bfd6-b3dc410862d9.__CR0,0,3011,3011_PT0_SX220_V1___.jpg


Got to give those V6s some lovein' then the magic will appear.

Just can't throw aftermarket parts at them.


☆☆☆☆☆
 
oh, so now "randy" works for edelbrock? knows the calibration settings between marine and auto carbs?

puh-leeze

"randy" can't figure out how to make a crap *** crap V6 run right, i doubt he even knows which end of the wrench to hold, let alone the intricacies of specialized carburetors.
I'd be willing to bet that he doesn't have it running right before the end of the year. I told him that he wouldn't have it running by the end of the summer. He doesn't believe that there's specific calibration kits for a carburetor for a particular engine.
 
If it were mine... go with the Edelbrock 1409 600 cfm carb with the 1489 Calibration Kit, and of course the stock HEI distributor with and External E-Core coil. Fast burn ignition, timing set to 8 degrees BTDC (because the hot fast spark acutally advances the timing > so back it down 4 degrees to put the fireball in the right spot.)
why would you use a marine carb in an automotive application?

you keep mentioning that the "magic coil" advances the timing, do you have proof to back that up? any kind of literature?

Run they will, just ask Dale Earhardt
sure, lemme just get my ouija board...

What Randy doesn't know, he will never know...
ain't that the truth, especially with an attitude like that.
 
I'd be willing to bet that he doesn't have it running right before the end of the year. I told him that he wouldn't have it running by the end of the summer.
what does it matter. you already said he bought another car.

He doesn't believe that there's specific calibration kits for a carburetor for a particular engine.
jfc. do you even read? and if you do, are those words and phrases understood?

there's a specific calibration kit for that carburetor for that engine in a specific application.

if you can't be bothered to go on edelbrock's site and read it there, i included a screen grab and highlighted the information upthread.
 
what does it matter. you already said he bought another car.


jfc. do you even read? and if you do, are those words and phrases understood?

there's a specific calibration kit for that carburetor for that engine in a specific application.

if you can't be bothered to go on edelbrock's site and read it there, i included a screen grab and highlighted the information upthread.
He wants to sell the vega and I don't want that pos.
 
He wants to sell the vega and I don't want that pos.
why not? you're and ace with the wrench and you'd have that thing humming in no time!

crusin' the blvd, sylin' and profilin' eight ways from sunday, baby!

imagine the possibilities!
 
Let's see the Pictures of the Vega and the V6 engine in it that you promised... just don't sluff it off.

No excuses, post them up.


☆☆☆☆☆
I've tried everything I know to post them and they won't, I don't have a clue why they won't
 
-
Back
Top Bottom