another timing issue/ backfire

[spade33]

ok so i know this has been posted alot but i hvae been trying the tricks posted on here and stil have not been getting anywere so i was hopeing there might be one more that could help me. i just took the motor out to replace the gastkets and replace one of the valves and the rockers. so pretty much i just tore it down to a shortblock no mesing with the oiling system or the cam timing and cam. anyways when i put it back in i have everything adjusted out such as the valves and i can not get it to start. i know i have the right firing order and i belive i set the timming correctly but it still is spitting fuel out of the top of the carb, and every once in a while catching fire. (amusing to see but probably not safe) anyways, i assumed this ment it was 180 out but it stil does it when i flip it around. i have run out of ideas so i was hoping you guys could help me. ( to make sure i am on the compression stroke i have taken the valve cover off and made sure the piston was moving up with both valves closed, is this and ok way?) anywas does anyone have any ideas?

 

[D.Hearne]

Sure you're looking at the #1 cylinder ? (first cylinder on the passenger side bank) Get that one up close to TDC, then rotate the crank till the timing pointer's pointing at the timing marks, aligned to where the pointer is at 12* BTC. Look at the distributor rotor, is it pointing at the #1 terminal on the distributor cap? If so, then it should fire up. If still not, then maybe you have the valves too tight.

 

[spade33]

the number one terminal on the distributor can be whichever one you want it to be right as long as the plug from the number one spark plug is running to it? is that correct? and ya i got the right cylinder. and i thought it might be the valves as well so i went through and adjusted them ina way i was told to which is hopefully ( i start with the numbre one cylinder and rotate it untill the intake valve is starting to close and then tighten the exhuast rocker untill zero movement plus 3/4 turn. and then continue switching to the intake valve and so on and so forth. and ps d. hearn thank you for all ur help i can always count on a responce from you

 

[Rusty67]

Sounds to me like you are using the wrong firing order. Are you using the 289/302 firing order or the 351w/5.0 firing order ? Also, which cam do you have ?

 

[D.Hearne]

the number one terminal on the distributor can be whichever one you want it to be right as long as the plug from the number one spark plug is running to it? is that correct? and ya i got the right cylinder. and i thought it might be the valves as well so i went through and adjusted them ina way i was told to which is hopefully ( i start with the numbre one cylinder and rotate it untill the intake valve is starting to close and then tighten the exhuast rocker untill zero movement plus 3/4 turn. and then continue switching to the intake valve and so on and so forth. and ps d. hearn thank you for all ur help i can always count on a responce from you

You're adjusting the valves wrong. When the intake valve is closing, the exhaust valve is opening. So its not on the base circle, you want it on the base circle when adjusting it. I do mine at TDC of the firing stroke. That's when both valves are closed and on the base circle. Start with #1, adjust, then rotate the crank 1/4 turn and do the next in the firing order..............and so on till all are done.

 

[spade33]

ah d. hearne your my hero haha i actally got it started after i thought about ur message a little more. haha i went though and re did the timing. i have a video on engine building and it said the exact same thing you just did on how to do it so thank you again for all the help. idk were id be without you on my car haha and thank you to all the stangneters :SNSign:

 

[D.Hearne]

Glad to help.