zero acceleration with my 250 chevy 6

I hope there is help for me I can't seem to get this right. My A has a 250 chevy 6 and 350 turbo in it and it idols fine and seems to accelerate fine when given gas when it is in park. But put it in gear and it idols but wont accelerate at all. What could I be overlooking?

 

My experience would point to the carb. Basically a fuel delivery problem. I had the same problem on a 318. Completely tore down the carb, cleaned and rebuilt. Same thing. Got a new one, just like a new motor. there's my .02

 

But put it in gear and it idols but wont accelerate at all. What could I be overlooking?

need a better explanation of the problem.

 

It idols in gear but when i press the gas pedal it coughs a couple of times then just idols even if I have the accelerator to the floor.

 

bad accelerator pump in carb.

 

Was it OK before or is this the first time its been run ?
What was done to it after it ran fine before ?

 

sounds like timing chain to me but could be a lot of different stuff to me

 

Sounds like your timing is retarded, but i betyou got a busted timing gear and your cam is retarded a tooth. You would have to be severely starving for fuel if it was a fuel issue, really need more info, just my 02

 

Va*** leak, check the line that goes to your va*** modulator they pop off on the ****** end all the time or get oil soaked and swell up and leak like a sieve.

 

You're saying that with the throttle wide open, that the motor just "idles"??

My first guess is that it's definitely a spark timing issue. You need to put a timing light on it - also need to make sure that the mechanical advance setup inside the distributor is intact and working.
Make sure that the vacuum advance canister is connected to a vacuum source.

 

Wouldn't just sit there and not rev up with a bad acc.pump
Ditto for timing off, fuel pump ,vac advance.
A 235 doesn't have a timing chain, does it? I believe it's gear to gear.
Still need for info.
At this point ,I'd look for a bug stuck in the carb main jet!

 

If it Idols, maybe it was voted off this week?

Engrish as a 2nd language these days.

 

Hey,my race partner came up with the answer.

The carb linkage fell off.

 

I agree, sounds like it's not getting enough fuel.or the throttle lever is loose on the throttle shaft?

 

I was going to say, it wasn't something as dumb as unhooked linkage somewhere is it? Couple weeks ago backed out of a parking spot in my daily and then had no gears, WTF? Got it so I could look under and found part of the trans linkage had fallen apart.

 

I had the same problem with my old 52..... it would idle and rev fine while in park but in gear it stumbled.......you might need a higher stall torque converter........worked wonders for me.....

 

or just a new convertor and transmission altogether.