77 HEI firing order

[badkarma510]

Trying to figure out my firing order...... more importantly, where the #1 is on the distributor...... wires are a mess so I am sure they are wrong, but dont know where to start on dizzy

 

[jckkys]

The firing order is 1-5-4-2-6-3-7-8 on all stock 289-302 stock EB engines. The #1 is molded into the distributor cap. The rotor turns counter clockwise.

 

[jw0747]

outside top of distributor cap where you plug in the wires should have a 1 molded in the plastic.

 

[Hozr]

Firing order depends on the cam, is it original?

From there turn the motor to compression on the #1 cylinder then see where the rotor id pointed. Markings on the cap are worthless if the distributor has been clocked incorrectly.

 

[badkarma510]

HEI distributor has no markings on top..... wondering what the timing on this should be.... motor has been rebuilt and new distributor installed

 

[jckkys]

'77 Broncos have a Dura-Spark I ignition. HEI is a brand name ignition from Delco-Remy, in other words GM. Ford distributor caps are marked as stated.

 

[Hozr]

Got any pics? Is the coil on top of the distributor or off to the side separate?

Again, what engine is it?

 

[badkarma510]

Its a HEI distributor.... picked up from JBG..... on their website....... thinking what I have is a cqarb problem, brand new Holley 550

 

[DirtDonk]

Is this a fresh rebuild badkarma? Or has it run before and you're just adding some new stuff to it?
If freshly rebuilt, do NOT crank the starter while you're trying to figure all of this out. Figure it out manually first, then try to start it. The reason is that if you have a flat-tappet cam you can ruin it before the engine ever starts. And I'm not exaggerating.

The #1 plug wire can go wherever you want it to, but the most common position on our Fords is ton one of the terminals approximately between the 12 o'clock and 2 o'clock positions.
Who installed the distributor? If it wasn't you you're going to have to pull the cap to see where the rotor is pointing at TDC. And therein lies another possible dilemma...
If you've been turning the engine over, either by hand or with the starter, and/or you did not rebuild it yourself, and/or you pulled the distributor to put the new one in without noting where TDC was originally, you're going to have to start from scratch.
Also, did you verify that the timing marks on the crank damper and the timing pointer on the front cover line up at #1 TDC on the compression stroke?

Answer as many of those questions as you can or feel like, and we can run down the entire procedure for you to start from scratch. After all, there is no one specific spot for a specific wire on the cap, until you've verified a whole passel of things.

Paul

 

[Rustytruck]

here is the 302 firing order. If the stock cam has been changed it might have the 5.0 firing order. If you can't get the stock firing order to work try the other firing order. Problem with this method is backfiring through the carb with the wrong firing order may blow the power valve in a Holley carb. You can tell by pulling the valve covers but that takes some head scratching.

http://www.mustangevolution.com/forum/attachments/31914d1316398122-5.0-5.8-firing-orders.jpg

 

[badkarma510]

Had to leave town for a fwew days and left with my mechanic. He got the guy that did the motor and they concluded that the dizzy was put in a little off, hopefully this will remedy the issues