stuck on firing order

biggyfan1

biggyfan1

Member
Mar 10, 2006
186
1
18
High Desert CA
#1
ok i was installing my Diss today with the motor on the stand and im not to sure what firing order i go by. the block is a 1989 mustang 5.0 HO now a 347. do i still use the stock firing order? im not even sure what stocl order is. i just know my #1 is passanger front. any help would be sweet1
 
#2
It depends on the cam you have. If you have the H.O. cam or a H.O. style roller cam replacement, the firing order is 1-3-7-2-6-5-4-8.

If this doesn't work, then you may have the older small block firing order that is 1-5-4-2-6-3-7-8
 
#3
well when i bought the cam i told them it was a roller out of a 1989 5.0 so im sure it is the HO style. i gave my manual away with my fox body mustang so i dont know where cyclender 2,3,4,5,6,7,8 are for that order. :bang:
 
#4
Cylinders are ordered from front passenger's side #1, then 2, 3, & 4 are same side in order moving toward firewall. So, #4 is passenger's side, firewall. Front driver's side is #5, working back to #8 at driver's side firewall.
 
#5
does it matter that when i placed my distributor in that the #1 is more tord the passenger side of the car and not the driver side like this picture shows? it just matters that i go in the same order right? clockwise 1 8 4 5 6 2 7 3. i placed the diss right where i want it and its all TDC with rotor aligned with #1 on the cap. my #1 starts where the # 6 is on this pic.
<a href="http://photobucket.com" target="_blank"><img src="http://i19.photobucket.com/albums/b170/biggyfan1/firingorder.jpg" border="0" alt="Photobucket - Video and Image Hosting"></a>
 
#6
Sounds like you have the distributor 180 degrees out, you're likely on the exhaust stroke, not the compression stroke. Pull a valve cover and watch as you rotate the balancer, make sure the intake valve is moving and not the exhaust. Or you can put your finger in the #1 hole and when it's trying to push it out due to compression, you're coming up on TDC. Then drop your distributor in and make sure it's pointing towards the 1 in the picture above.
 
#7
im almost sure it is at TDC #1 piston was on its way up and once it stoped at the top the timing marks were at 0 also. if i turn the crank over again and the piston comes up for the second time the timing marks dont line up, it only lines up every other time. cant i put my diss in at and angle and then after it is droped in cant i just make what ever post the rotor it lined up with the #1 post?
i thought as long as im at TDC and i can line up post #1 with piston #1 im fine. yet post #1 is depending on where i drop in the Diss. RIGHT?
 
#8
Well, I guess you can line it up anywhere you want it to be, you just have to rotate the picture to that point and lay them out that way, but why would you want to? From your sig, it looks like you might goto the strip, if you have anyone helping you, it'll throw them off, especially if your changing plugs between rounds. It's easy to pick the distributor up and reset it to do it right.
 
#9
If you are really at TDC compression stroke on #1, you can "clock" the dizzy anyway you want; just rotate the dizzy to point at #1 plug wire position. There is some limitation to how much you can turn the dizzy, so make sure you have enough turn available to properly time (advance) the motor later.

Your picture was okay, but you said "clockwise" when you should have said "counterclockwise". Don't get that wrong, else you will really be confused when it doesn't run.

If you have plug wire organizers that need certain length plug wires, then make sure you clock the dizzy to accommodate them. Or, if you will cut your own, then be consistent in the future how you clock the dizzy so they always fit.
 
#10
well i double checked it and its at TDC and it was pushing my thumb off the spark plug hole on the way up. and now that i took the Diss out and put it back in, it now set in the right position like the picture above shows. for some reason it wouldnt go down all the way last time and thats the reason i put it like i did. thanks for your advice guys. its all systems go on this problem.:nice:
 
#11
It didn't go in all the way 'cause the dizzy shaft wasn't engaging the oil pump drive, most likely. That's not a big problem when you are at TDC, but it can be if you pull it at some other point and need to get it back in the same tooth. That's why it is always a good idea to place the motor at TDC, compression stroke when you remove the dizzy - it's just a little easier to keep things straight.
 
#15
biggyfan1 said:
im almost sure it is at TDC #1 piston was on its way up and once it stoped at the top the timing marks were at 0 also. if i turn the crank over again and the piston comes up for the second time the timing marks dont line up, it only lines up every other time. cant i put my diss in at and angle and then after it is droped in cant i just make what ever post the rotor it lined up with the #1 post?
i thought as long as im at TDC and i can line up post #1 with piston #1 im fine. yet post #1 is depending on where i drop in the Diss. RIGHT?
Click to expand...

Sounds like you figured it out so I'll add this to clear things up for you: The timing marks line up with the timing pointer every revolution. There are two TDC's in a 4 cycle engine. At one TDC #1 cylinder fires, at the second #6 does. When #6 is firing, #1 is on it's exhaust stroke. As long as #1 is at TDC on the top of the compression stroke, you can wire the distributor starting from whatever terminal the rotor is pointing at.
 
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