[colinlesser]

ok my 351w is backfireing when i shift gears( MANUAL 4-SPD) and it also backfires if i stomp on the gas and let off, what are some possible cuases for this, i looked in the search but didnt get anythign that pertained to this engine setup

 

[Bama Patriot]

Have you checked the timing?

 

[79F150]

Carb is lean on the squirt.

What carb do you have?

IF it is a holley you need an accelerator pump cam.


If it is another like Edelbrock you need change pin location on the pump lever.

 

[colinlesser]

its a 600 cfm edelbrock carb,

 

[colinlesser]

how can i check the rich/ lean ness?
also what shold the timing be set to?

 

[79F150]

Here make yours look like this... Yours is probably in the middle or top hole is stock... Put it all the way to the bottom...

 

[colinlesser]

ok i made the adjustment,i also replaced my ignition coil and rotor and cap, the truck is acting weird now, it wont start while you try to crank it, only when you release the key does it start

 

[79F150]

Are you sure you didn't cross any wires??? Can you post pics of your motor kinda up close??? From a top view...



Not to criticize you but when you a chaseing a problem only fix one thing at a time because this happens more than you would think.:duh

 

[colinlesser]

it was jsut flooded i guess its working right now, and the backfireing seems to have stopped, unfortunately you could have told me that little clip tends to go flying when you try to remove it

 

[79F150]

it was jsut flooded i guess its working right now, and the backfireing seems to have stopped, unfortunately you could have told me that little clip tends to go flying when you try to remove it

LMAO yeah I lost 3 in one shot one time. That was the last time I worked on a carb with a good buzz....:histerica


Glad your fixed.:thumbup

 

[79F150]

This is the last Holley I built for the race car...


When it started.

When finished...

 

[Jarsh92]

I can picture myself doing the same thing, I hate little clips and springs. Seems like they can fly 100 feet!!!:doh0715:

 

[colinlesser]

bad news, its backfireing again

 

[Bama Patriot]

Did you check your timing? Guess not.

 

[DvlRacer]

10º BTDC Colin, try it out bro.

 

[colinlesser]

i cant check the timing, i wish i could but for some retarded reason the timing needle is on the driver side under the water pump outlet and hose so it is impossible to do the timing without removign the hose and most liekly the pump