I need engine help

[SRVBLUES64]

I have a 350 in my 66 chevy truck it seemed to be laying down when accelerated or put into gear. this is what we have done, vacuum checked perfect all electrical checked paerfect distri and other ohms that you can check. I even put a new hei accel dizzy on we timed it with a light but its just keeps laying down Im thinking timing chain gears they are new but that the only thing I can thing of now any thoughts any one before I rip it a part to look at the gears??????

[Lower]

Checked the fuel filter and cleaned the carb?

[Big Fenders]

Possibly carburation...accelator pump comes to mind...
Bob

[scotts62]

Is it stock or just start all of a sudden? I think of my truck when i put dual carbs and huge cam in it and i had to put a stall converter in it so it would move, that comes to mind to me

[S-31]

Sounds like accelerator pump going bad in the carb to me. Bump the timing up 2-4 deg and see if it gets better.

[SRVBLUES64]

Thanks guys I have a brand new 570 avenger in it, I just got the engine running about a week ago sounds great till in gear, I did use my old tank and it seems to have enough gas through it Im thinking timing chain maybe a tooth off?

[fasteddie1964]

Originally Posted by SRVBLUES64

Thanks guys I have a brand new 570 avenger in it, I just got the engine running about a week ago sounds great till in gear, I did use my old tank and it seems to have enough gas through it Im thinking timing chain maybe a tooth off?

If you're using the old tank better put a filter between tank and fuel pump. This is what I collected using new tank just in the line from tank to fuel pump.


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[tincan1966]

If the truck was an original 6 cyl, the fuel line is only 5/16", could be starving a bit for fuel volume.
Also a new carb doesn't mean it's a good one-it happens.
Sounds to me more like a fuel problem, not a major mechanical thing.Is the vac advance on a ported or timed vac port on the carb?

[SRVBLUES64]

all lines are correct and vacs at 14+ it seems that fuel is the problem it runs and idles great but once in gear and I power brake it or lunge forward it dies

[Wootdog]

For troubleshooting purposes, I would install a see thru fuel filter in line. You can then visibly see if the fuel volume goes down when you put it in gear. It will take two people to do this.
Kerry