backfire though carb

so now that i got the slow turning problem kinda solved i have another problem, why does it back fire though the carb when i go to start???

i pretty sure its timing issue BUT which way is it??? to retarded or to advanced???

thanks for ANY help

 

Do u have the right firing order, that usely happens when you have either a mixed up wire or the timing is WAY off causing the fuel to ignite when the intake valve is open.

 

firing order...

 

What we really want to know...

Can we see a pic of your mellon, I'm guessing you have no eyebrows left .

 

no i wasent leanin over it

but i think im going to need some new boxer briefs

 

i was so meticlus(sp) in making sure everything was on point

itll start up for a second then shut off , then ill turn it back on and it pops back though the carb....

 

firing order.

 

eddie make sure that you have the firing order going counterclockwise on the dissy that happen to me just yesterday.

 

I actually set mine up using the wrong one as #1. So the entire thing was out of wack...Took me a while but once I figured it out...

 

tat's why i always buy a cap that has the number 1 stamped on it.

 

uh oh ill have to check that out, thats a could be

 

this makes me ask:

do you have the timing all jacked up?

 

A lean mixture will make it fire back through the carb.... Since you are sure you set the timing right, and if it runs but back fires through the carb it is because the mixture is too lean.
It usually happens when the engine is cold and the choke isn't working.

 

http://www.moddedmustangs.com/reference/firing-orders.php

I had the same thing, I set my firing order to the old style 302, the one my Maverick Chiltons said, I swapped in a 95 5.0, whole different FO, I ws running on 4 cyl, and dumping a ton of fuel into the crankcase

 

Your CAM may be off a degree or two