I just exchanged a long block on my 1982 F-150 302 truck. This engine comes with a DuraSpark III control system. I Understand the typical firing order 1-5-4-2-6-3-7-8 is not correct for this control system. Can you tell me what the proper firing order is?
Thank you very much.
Jim

 

Jim, isnt it stamped on the intake manifold?

 

Yes, the stamp is on the intake manifold 1-5-4-2-6-3-7-8. But this firing order is not compatible with the EEC111 control system. I have 2 books and they will not explain the alternate or corrected timing order. Thanks for your help on this!
Jim

 

The EEECIII should say Duraspark III in my last message to you.
Thanks
Jim

 

The firing order is the same as (most) all other 302 engines:

1-5-4-2-6-3-7-8

But, the the order the wires are arranged on the distributor cap is:

1-3-4-8-6-5-7-2

This is because the EEC-III distributor has electrodes on both sides of the rotor. So it fires alternately from both sides. So even though it's wired in a different order, if you go back and forth from one side to the other, the firing order is the same.

Since you have a new engine, you might find this useful too:

The computer controls all the timing. EEC-III automaticaly adjusts the distributor advance. You can't set the timing by rotating the distributor. But the computer needs a reference from TDC in order to be accurate.

Here's the procedure to align the reference point:

1. Set the crank on #1 cyl compression stroke, TDC.

2. Remove cap and rotor.

3. Look at the notch in the distributor shaft and the adaptor. Now turn the crankshaft until the small notch in the shaft lines up the the notch in the adapter. If the marks on the harmonic balancer are still between plus or minus 4 degrees of TDC, the distributor is in alignment.

4. If it's off by more than four degrees, turn the crankshaft back to TDC.

5. Loosen the two bolts on the sleeve the distributor shaft goes through.

6. Insert a screwdriver into the small notch in the distributor shaft and turn it to align with the notch in the adapter.

7. Tighten the bolts in the sleeve holding the shaft. Reinstall rotor and cap.

Here's a photo of the small notch in the shaft aligned the the notch in the adapter as seen through the adapter:

 

Thanks Horsepuller! My response was delayed due to work, but I am taking off today to try to work some more on my truck. We worked on it last night until late and have another question. Could you tell me the significance of the arrow on the rotor? GLAD YOU ARE OUT THERE!
Thanks
Jim
Palm Springs Area

 

The arrow is not really that important. It just points to the pin on the other side of the rotor that fits into the notch on the distributor.

Here's something else: When you install the Crankshaft Position Sensor, use a feeler gauge to set the gap between the magnet and the tip of the lobes on the pulse ring to .075" gap. The pulse ring has four lobes and is pressed onto the back of the harmonic balancer.

 

HORSEPULLER---YOU ARE THE GREATEST! Thank you for your reply. The truck isn't running yet, but with your help, I'm closer. This may be the final answer...I'll let you know. The 2 books that I have do not explain to set the gap as you suggested. YOU SHOULD WRITE A BOOK!
Thanks
Jim

 

Glad to help. Hope the job is going okay! Keep us informed on your progress.

Hey, I just realized you are new to the boards. Welcome to FTE and thanks for joining us in the '80-'86 forum!

 

HI Horsepuller,
I have put a 5.0L long block in my 83' F150, I had both engines sitting in my garage and swapped out all the stuff from the old engine to the new, being careful with this Duran park III ignition system, which I never worked with before, or even seen before, so, after a lot of work getting the new engine in place and getting everything hooked up according to your info and the books which don't tell you enough, I was able to get the truck to start up, but I found out that it must be off a little on the timing cause when I go to put it in gear, it starts to back fire through the carb and wants to stall, now I have done everything that I could possibly think of, including what you told others in the past, but you know what, neither the old engine or the new engine have timing marks to work with, so when I was building the new engine, I inserted a dowel in the #1 cylinder and watched the valves as I rotated the crank (old school) to find TDC, then I inserted the distributor in to place, and yes, it only goes in one way and can not rotate either way, so, back to my question, how do I get the engine from back firing and start performing right, I am at a loss here, HELP, thank you...

 

ki6gpb - Sorry no one responded, did you get this fixed ?

 

Hello. I have a 79 f150 with a 300 6. I just acquired a 351 Cleveland. Will f100 engine perches work. From my understanding the f100 was 2wd. Am I wrong? Kinda stuck until I get the right perches.

 

Read this post. https://www.ford-trucks.com/forums/1...l#post17019477

 

What are you putting the engine in? The 1979? Wrong forum, you are in the 80-86 forum. Better go to the correct forum to get a good answer.