Trying to start up my 302 motor

[rawlinss 14]

Trying to start up 302 with 600 holley carb. No such luck yet.

There is a fire coming up through the carb. What causes this?

 

:scared:

Edited October 7, 2012 by rawlinss

[timsmustang 12]

Usually caused by incorrect timing...

[rawlinss 14]

thanks...

[timsmustang 12]

The only way you're going to get a fire up through the carb is if there is a spark in the cylinder with the valves not closed. Either it's sparking at the wrong time or the valve train is messed up

[Mike65 476]

Sounds like you have the plug wires on wrong or the dist is in off time.

[rawlinss 14]

it is out of time. Should lifter springs be up or down when #1 piston is up??

[timsmustang 12]

Springs should be up with valves closed. Pull number one plug and turn engine over with your thumb over hole and you will know TDC by the air rushing out...

[rawlinss 14]

OK, TDC Set. Thanks Tim.

[timsmustang 12]

Great...let us know when you get it going

[rangerdoc 22]

Which 302 firing order are you using? If you used anything but a stock cam you probably will need to use a 351 firing order.

[rawlinss 14]

used a 302 firing order I found on-line. However, I do have an after market cam from Comp Cams and GT40P Heads....

Will look into different firing orders tomorrow....

[rawlinss 14]

We currently have the 302 motor set up as 15426378.

 

So with the

GT40P heads

600 holley

Wyan intake (SP)??

and after market cam

 

WHAT FIRING ORDER SHOULD I USE????

THANKS!!

Edited October 8, 2012 by rawlinss

[Phils69 27]

Post the Comp cam part #

[rangerdoc 22]

I agree to post your cam # to verify, but I'll bet you need to change to 13726548.

[Phils69 27]

Sounds like a nice setup you have there. Did you have much selection on headers for the P heads?

[rawlinss 14]

Sounds like a nice setup you have there. Did you have much selection on headers for the P heads?

 

 

no, only headers I found to fit were Sanderson Headers.

[rawlinss 14]

will check on cam part # when I get home tonight...

[rawlinss 14]

Cam I have is

 

Comp Cams PN 31-215-2

Edited October 8, 2012 by rawlinss

[fvike 173]

Fire up the carb can also be caused by the distributor being 180 degrees off.

Also, 302HO engines uses 351W fireing order. All other 302s don't.

 

Simply turn the engine, and see if cyl 5 or 3 opens next after cyl 1. If it's 5 then use 302 fire order (1-5-4-2-6-3-7-8). If it's 3, then use 351 fire order (1-3-7-2-6-5-4-8).

[rawlinss 14]

I agree to post your cam # to verify, but I'll bet you need to change to 13726548.

 

Comp Cams PN 31-215-2

[jholmes217 65]

Comp Cams PN 31-215-2

 

You should use a 289/302 firing order for that one. Pull number 1 plug, turn engine over until you feel the puff of air, then put the timing mark at 10 degrees BTDC. Drop your distributor down with the rotor pointed at number 1. Then put your spark plug back in and reattach the plug wire. Turn the key to the on position, but don't crank it. Then hook up your timing light. Slowly turn the distributor back and forth until you get a flash from the timing light. Tighten down the dizzy there. Now, try to start it.

Edited October 9, 2012 by jholmes217

[rawlinss 14]

Fresh rebuild and engine has not started yet. FYI also have a pertronix ignigter set up in old Distributor. Did away with points and condencer.

Waiting on a little more input to make next move.

Thanks.

Edited October 9, 2012 by rawlinss

[rangerdoc 22]

I was hoping it was as easy as the wrong firing order. Are you absolutely sure you have the wires on the dizzy cap set correctly? I had mine off by one to the left and it threw everything off. Is your #1 wire connected to the spot where your rotor is pointing at the #1 cylinder at TDC? With #1 cylinder at TDC the rotor should be pointing at the #1 cylinder. The #1 plug wire should be on top of the rotor at that point. Then follow your firing order around. You didn't connect the wires on the dizzy going the opposite direction by chance?

[rawlinss 14]

Dizzy cap was wrong. No more fire coming from the carb now thanks for your help. Still not started yet though. Having some electrical issues now. UGHhh

[rawlinss 14]

started her up now!!!!

Thank you all for your input. Much appreciated.

 

http://s202.beta.photobucket.com/user/GrabberStangGal/media/100_2982_zps4e235f08.mp4.html?sort=3&o=0

Edited October 10, 2012 by rawlinss